diff --git a/CHANGELOG.md b/CHANGELOG.md
index f6e6f58..167bef0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,8 +13,15 @@ The format is inspired by [Keep a Changelog](https://keepachangelog.com/en/1.1.0
 - A Run whose Turnstile token the server rejects now ends with the server's message instead of re-challenging. The runner used to solve again every time the response carried the challenge marker, so a persistently failing Siteverify (wrong secret, hostname, or action) turned one click into an unbounded loop of solves, Worker POSTs, and Siteverify subrequests. Each Run now earns at most one challenge, and the failure message says to press Run again.
 - Siteverify calls time out after 10 seconds, tokens longer than Cloudflare's documented 2048 characters are rejected without a subrequest, and a `success: true` response with a missing or non-string `hostname` fails closed instead of raising a 500. The gaps surfaced by comparing `_verify_turnstile` with the canonical handler in Cloudflare's Turnstile Spin skill.
 - Production Python packages are locked. Pywrangler 1.17.4 vendors a committed, hash-pinned `pylock.toml` instead of resolving an unpinned `fastapi` at deploy time, and `uv.lock` pins the same versions (FastAPI 0.141.1, Starlette 1.7.0, Pydantic 2.10.6) so the test suite runs against exactly what ships. `tests/test_dependency_locks.py` fails on drift, and CI and `make deploy` fail if a sync would change `pylock.toml`. Starlette 1.7.0 also clears the five advisories against the previously tested 1.0.0.
+- The bytes-and-bytearray figure rendered doubled backslashes (`b'\\x63\\x61\\x66'`) and drew bytes the example never uses (#18). Redrawn from the example's real values, and three new figure contracts close the class of bug: no rendered text may carry a doubled backslash and escape sequences must appear in the example source (13), every arrow is at least 20 units (14), and `site.css` must define every figure token in both schemes (15).
 - Example-page runner wiring (Run interception, Reset, the share button, and keyboard navigation) no longer waits for the CDN-backed highlighter and editor modules: `runner.js` loads `async`, so a slow or unreachable esm.sh cannot stall it — ordered module scripts otherwise execute strictly after every preceding module settles, including their top-level awaits.
 
+### Changed
+
+- Figures now paint with `--fig-ink`, `--fig-ink-soft`, `--fig-accent` and `--fig-soft` tokens instead of literal colours, and `site.css` defines the tokens for both colour schemes. Dark mode recolours every figure with the page; the light "paper chip" behind figures is gone. Figure mono and sans faces follow the page's own font stacks, and mono runs are pinned to the grammar's character advance with `textLength` so divider positions hold on every platform. Paired figures in a banner share a baseline (a two-row subgrid). Five figures lost an accent that marked an arbitrary row (`naming-decisions`, `iteration-loop-selector`, `type-shape-catalog`, `reliability-signal-map`, `container-methods`); nine arrows that were mostly arrowhead were lengthened to the new 20-unit minimum.
+- Ten figures redrawn as mechanisms carrying the lesson's own values: closures is an environment diagram with the returned frame ghosted and one live `__closure__` reference; generators shows the cell's two `next()` calls on `countdown(3)` with the surviving local beside each; recursion shows the example's tree at the deepest frame of `total(tree)` with the values each frame returns; dicts shows the cell's keys hashed to slots with the insert of `"year"`; sentinel iteration shows `read_chunk` yielding `"py"` and `"thon"` and stopping on the empty string; string formatting's format spec is a railroad tracing the cell's `05.1f`, skipped stations ghosted under a bypass rail; bytes-and-bytearray draws the example's bytes as integer slots with the in-place write and moves to the cell that performs it; regular expressions shows the cell's two capture groups landing on `Ada: 10`; values shows `text` bound to a `str` object and the `type()` hop to where `upper()` lives; logging shows the cell's three records crossing the handler's INFO gate. The binding figure is a parametrised factory, so `variables` shows `message → "hi"` and `constants` shows `MAX_RETRIES → 3`.
+- The rubric states that table-shaped figures are redrawn rather than removed, that a figure whose caption names no single element carries no accent, and how cell-0 anchors are scored. The review, principles and queue are in `docs/diagram-upgrade-plan.md`.
+
 ### Added
 
 - `/about` page describing how the site is made — the verified-output pipeline, the runner sandbox, the figure grammar, and the quality gates — with a design-language section that renders the live CSS tokens (color swatches, spacing scale, type specimens, and a real walkthrough cell as a specimen). Linked from the nav on every page and listed in the sitemap.
diff --git a/docs/diagram-upgrade-plan.md b/docs/diagram-upgrade-plan.md
new file mode 100644
index 0000000..2678303
--- /dev/null
+++ b/docs/diagram-upgrade-plan.md
@@ -0,0 +1,179 @@
+# Diagram upgrade plan
+
+Written 2026-09-27 from a review of every attached figure on the live
+site, the gestalt review pages, the grammar, both rubrics and the
+registry. The rubrics remain the scoring instruments. This document
+records what the review found, the principles that follow from it,
+what the first pull request changed, and the queue after that.
+
+## What the review found
+
+The library's strengths are enforced rather than hoped for: the palette,
+stroke weights and typography are locked by contracts, captions assert
+what is true instead of narrating the picture, and the gestalt review
+page paints from the production paint functions. The figures that teach
+best show a mechanism changing state, such as aliasing before and after
+an append, the iterator caret advancing one row at a time, and the MRO
+diamond flattening into a chain.
+
+The weaknesses are measurable.
+
+| finding | measure |
+|---|---:|
+| paint functions using only cell, arrow, dashed line and text | 66 of 124 |
+| `cell` calls / `closed_arrow` calls / `lanes` calls | 236 / 129 / 1 |
+| attachments anchored after cell 0 | 106 of 115 |
+| example figures scoring exactly 9.0 (the rest 9.5, none lower) | 106 of 109 |
+| journey figures scoring exactly 9.0 | 21 of 21 |
+| arrows shorter than 20 units | 9 |
+
+Behind the numbers: figures hard-coded the light palette, so in dark
+mode each one sat on a cream chip; a paired banner had no shared
+baseline; the SVG asked for JetBrains Mono and Source Sans while the
+page loaded no web fonts, so the visitor's operating system chose the
+faces; several selector figures put the accent on whichever row the
+loop reached last; and because no contract read figure text, the
+bytes-and-bytearray figure rendered doubled backslashes for months and
+the regular-expressions figure drew a pattern the example never uses.
+
+## Principles
+
+1. **Show state over time.** One frame is a label. The same frame after
+   each step is a mechanism. Repeating one drawing is cheap in this
+   grammar; `iterator-unroll` and `generator-resume` do it.
+2. **Draw the heap.** Python's picture is frames on the left and objects
+   on the right with arrows crossing between them. The grammar now has
+   an `env` phrase for the frame, and closures uses it.
+3. **Redraw a weak figure; never replace it with a note.** A drawing
+   that would be no worse as a two-column table needs a mechanism
+   drawn in its place. Removing it and recording a rationale leaves the
+   page with less than it had, which the first draft of this plan got
+   wrong for four pages.
+4. **The figure carries the lesson's own names.** Reuse the mechanism
+   by parametrising the paint function, so `variables` shows `message`
+   and `constants` shows `MAX_RETRIES`.
+5. **Accent only what the caption names.** When the caption names no
+   single element, the figure has no accent.
+6. **Check figure content against the example.** Geometry contracts
+   cannot see a wrong label. A content contract can.
+7. **Paint with tokens.** The grammar emits `var(--fig-*)`; the page's
+   stylesheet decides the ink in each colour scheme.
+8. **Typography follows the page.** Mono and sans use the page's own
+   stacks, and mono runs carry `textLength` so divider maths holds on
+   every platform. The italic serif stays for identifiers.
+9. **Rank before scoring.** With 106 of 109 figures at 9.0, the score
+   is a ship gate. Choosing what to redesign next needs a ranking.
+
+## What the first pull request changed
+
+Grammar (`src/marginalia_grammar.py`):
+
+- `INK`, `INK_SOFT`, `EMPHASIS` and `SOFT_FILL` are `var(--fig-*)`
+  references. `FIGURE_TOKENS_LIGHT` and `FIGURE_TOKENS_DARK` hold the
+  values; `figure_token_css()` emits them for the gestalt pages and the
+  social-card shell.
+- `FONT_MONO` and `FONT_SANS` match `public/site.css`; every mono run is
+  pinned to `MONO_ADVANCE` with `textLength`.
+- `ARROW_MIN = 20`; `Canvas` records every arrow's length.
+- `name_box` and `bind` take a width so long names fit.
+- The `env` phrase draws a frame with bindings, optionally ghosted, and
+  returns anchors for heap arrows.
+
+Figures (`src/marginalia.py`):
+
+- `closure-cell` is an environment diagram: the returned frame ghosted,
+  `double` naming a heap function object, one accented `__closure__`
+  reference back into the frame.
+- `generator-resume` replaces `generator-ribbon`: three ribbons for
+  three `next()` calls on the cell's own `countdown(3)`, the surviving
+  local beside each.
+- `format-spec` is a railroad tracing the cell's own `05.1f`: visited
+  stations shaded, skipped stations ghosted under a bypass rail.
+- `bytes-vs-bytearray` draws the example's bytes as integer slots and
+  the in-place write `packet[0] = ord("P")`, anchored to the cell that
+  performs it.
+- `regex-groups` replaces `regex-anchors`: the cell's two capture
+  groups dropped onto the record `Ada: 10`.
+- `value-type-lookup` replaces `value-types`: `text` bound to a `str`
+  object, then the `type()` hop to the class where `upper()` lives.
+- `logging-threshold` replaces `logging-levels`: the cell's three
+  records crossing the handler's INFO gate, `debug` dropped.
+- `variables-bind` and `constants-bind` come from one parametrised
+  factory.
+- Nine arrows lengthened to the minimum; five figures lost an accent
+  that marked an arbitrary row.
+- `literal-forms` and `collections-containers` stay as they were, scored
+  8.5, until a mechanism replaces them.
+
+Page (`public/site.css`, `src/templates/about.html`):
+
+- `--fig-ink`, `--fig-ink-soft`, `--fig-accent` and `--fig-soft` defined
+  for light and dark; the dark-mode paper chip removed.
+- `.cell-banner figure` is a two-row subgrid, so paired figures
+  bottom-align their drawings and start both captions on one line.
+
+Contracts (`tests/test_marginalia_geometry.py`):
+
+- 13, content: no doubled backslash anywhere; an escape sequence in an
+  attached figure must appear in that example's source.
+- 14, arrow length: every arrow at least `ARROW_MIN`.
+- 15, theme tokens: `site.css` defines all four tokens in both schemes
+  with the grammar's values, and every grammar colour is a token.
+
+Rubrics: the redraw rule, the zero-accent rule, the placement note and
+the three contracts are in `docs/example-figure-rubric.md` and
+`docs/journey-visualisation-rubric.md`; the token and typography
+invariants are in `docs/visual-explainer-spec.md`.
+
+## Queue
+
+Ordered by payoff. Each item is one pull request.
+
+1. **State over time** for `context-managers` (enter, body, exit, with
+   the exception path as a second strip), `decorators` (two calls, two
+   wrappers) and `object-lifecycle`.
+2. **Heap drawings** with `env` for `scope-global-nonlocal`, `recursion`
+   (frames with `n` bindings instead of labelled cells) and `unpacking`.
+3. **Mechanisms for the two table figures.** `literals`: the same value
+   spelled three ways converging on one `int` object. `collections-module`:
+   one container's operation, or split the page.
+4. **Parametrise the remaining reused figures**: `iterator-unroll`,
+   `iter-protocol`, `class-triangle`, `operator-dispatch`,
+   `comprehension-equivalence`.
+5. **Move anchors to the cell where the move happens.** For each cell-0
+   attachment, ask whether a later cell holds the mutation, dispatch or
+   resume the figure depicts. Rewrite criterion 10 once the distribution
+   is honest.
+6. **Rank the gestalt.** A pairwise ranking table in the registry, and
+   redesign from the bottom ten. The 8.5 score stays as the gate.
+7. **Widen the content contract** from escape sequences to every mono
+   literal that looks like Python source: it must appear in the
+   example's code or output.
+8. **Buffers and hashes.** `dict-buckets` and `set-buckets` with hash
+   values from the example; `list-append` and `slice-ruler` as header
+   plus buffer.
+
+## What to study
+
+- **Composing Programs** (composingprograms.com) and **Python Tutor**
+  (pythontutor.com) for the environment diagram: frames left, objects
+  right, and how a closure and a recursive call are drawn.
+- **Ned Batchelder, "Facts and myths about Python names and values"**
+  for name-to-value drawings done the same way every time.
+- **Crafting Interpreters** (craftinginterpreters.com) for warm ink on
+  cream, one idea per figure, held consistent across a whole book.
+- **Sam Rose, samwho.dev** ("Hashing", "Memory Allocation") for
+  programmer-facing figures with a locked grammar; the model for the
+  bucket figures.
+- **Lydia Hallie, "JavaScript Visualized"** for the frame designs of
+  scope chain and closures.
+- **Bartosz Ciechanowski** (ciechanow.ski) for figures where exactly
+  one variable changes between frames.
+- **SQLite syntax diagrams** for what a railroad is; `format-spec`
+  follows them.
+- **The Rust Book, chapter 4** and **"Go Slices: usage and internals"**
+  for header-plus-buffer drawings of list, bytearray and slice.
+- **Tufte, Visual Explanations, "the smallest effective difference"**
+  for how little contrast emphasis needs.
+- **Maggie Appleton** and **Julia Evans** for mechanism drawings that stay playful without adding marks.
+- **Distill.pub** for captions that carry the claim.
diff --git a/docs/example-figure-rubric.md b/docs/example-figure-rubric.md
index 1eac551..736d218 100644
--- a/docs/example-figure-rubric.md
+++ b/docs/example-figure-rubric.md
@@ -60,6 +60,9 @@ per-figure scoring.
    figure. The accent goes on the single element the cell prose
    names (the live mutation, the captured cell, the dispatch arrow).
    Three accent marks competing for attention is no emphasis at all.
+   When the caption names no single element, as in a selector where
+   every branch is equal, the figure has zero accents, because an
+   accent on the row a loop happened to reach last marks nothing.
 8. **Restraint (0-1.0)** — no decoration that does not carry
    information. No drop shadows, gradients, ornamental rules,
    non-orthogonal tilts, or marks placed for "balance".
@@ -77,6 +80,14 @@ per-figure scoring.
     cell just made, not stand alone as a generic illustration of the
     example title.
 
+    As of September 2026, 106 of 115 attachments anchor after cell 0,
+    so this criterion is usually scored against the first cell. An
+    opening figure is a legitimate design, and it earns the 0.5 by
+    summarising the first cell's move rather than the title. When a
+    later cell holds the mutation, dispatch or resume the figure
+    depicts, move the anchor there; `bytes-and-bytearray` moved to
+    cell 3 for that reason.
+
 ## Topic gates (cell-shape specific)
 
 - **Binding cells** (assignments, `=`) — show the name-arrow with the
@@ -107,6 +118,34 @@ the figure can merge.
 
 - **One figure per cell, at most.** Two figures on one cell signal
   the cell is doing two things; split the cell instead.
+- **Table figures are redrawn, never removed.** Rows of `name | role`,
+  `type | spellings` or `level | number` are reference material; they
+  score 8.5 at most under criteria 2 and 4 because a table in the prose
+  would do the same work. The remedy is a mechanism in the same slot:
+  `values` became the `text → str` binding with the `type()` hop to
+  where `upper()` lives, and `logging` became three records crossing the
+  handler's level gate. Removing a shipped figure and recording a
+  rationale leaves the page with less than it had; the
+  `no_figure_rationales` registry is for pages whose lesson has no
+  drawable mechanism, and a page that once carried a figure does not
+  qualify.
+- **The figure carries the lesson's own names.** Where one mechanism
+  serves several lessons, parametrise the paint function
+  (`_bind_figure("MAX_RETRIES", "int", "3")`) instead of choosing
+  between placeholder names and a bespoke copy.
+- **Content fidelity, enforced.** No rendered text may contain a
+  doubled backslash, and a mono label containing an escape sequence
+  must appear verbatim in the example's Markdown source. The
+  `bytes-vs-bytearray` figure shipped `b'\\x63\\x61\\x66'` for
+  months because every contract measured geometry and none read the
+  label. *Contract 13 — FigureContentContract.*
+- **Minimum arrow length, enforced.** Every closed arrow is at least
+  `ARROW_MIN` (20) units long; below that it is mostly head. Widen
+  the gap between the boxes, never shrink the head. *Contract 14.*
+- **Both colour schemes, enforced.** Figures paint with the
+  `var(--fig-*)` tokens; `public/site.css` defines all four in the
+  light root and the dark media block with the grammar's values, so
+  no figure needs a light chip in dark mode. *Contract 15.*
 - **figcaption present and declarative.** Captions in the form
   "Two names share one mutable list — appending through one name
   changes the object visible through both." Not "this shows X" or
@@ -231,4 +270,8 @@ example reads as a coherent set rather than independently authored
 diagrams.
 
 The score is a guide, not a substitute for reading the cell beside
-its surrounding prose.
+its surrounding prose. Because 106 of 109 attached figures score 9.0
+and the rest 9.5, the score no longer says which figure to redesign
+next. Use the gestalt page to rank the library pairwise and redesign
+from the bottom, and keep the score as the ship gate
+(`docs/diagram-upgrade-plan.md`).
diff --git a/docs/journey-visualisation-rubric.md b/docs/journey-visualisation-rubric.md
index 18f8258..83eb91e 100644
--- a/docs/journey-visualisation-rubric.md
+++ b/docs/journey-visualisation-rubric.md
@@ -43,7 +43,10 @@ Score each section figure on a 10-point scale.
 7. **Emphasis scarcity (0-1.0)** — at most one accent mark per
    figure. The accent goes on the single element the section names
    (the live yield, the dispatch arrow, the captured cell). If three
-   things are orange the figure has no emphasis at all.
+   things are orange the figure has no emphasis at all. When the
+   caption names no single element, as in a selector where every branch
+   is equal, the figure has zero accents, because an accent on the row a
+   loop happened to reach last marks nothing.
 8. **Restraint (0-1.0)** — no decoration that does not carry
    information. No drop shadows, gradients, ornamental rules,
    non-orthogonal tilts, or marks placed for "balance".
@@ -95,7 +98,9 @@ Score each section figure on a 10-point scale.
   width the layout gives it (`clamp(280px, 70vw, 640px)`); design at a
   viewBox whose rendered width fits the shared 640px ceiling.
 - **Uses only the four palette constants.** `INK`, `INK_SOFT`,
-  `EMPHASIS`, `SOFT_FILL`. Anything else is grounds for redesign.
+  `EMPHASIS`, `SOFT_FILL`, which resolve to the page's `--fig-*`
+  tokens so a section figure renders in both colour schemes without a
+  chip. Anything else is grounds for redesign.
 
 ## Quality bands
 
diff --git a/docs/lessons-learned.md b/docs/lessons-learned.md
index 6e9a944..91a0a50 100644
--- a/docs/lessons-learned.md
+++ b/docs/lessons-learned.md
@@ -135,6 +135,14 @@ git diff --check
 - **A bypassed check needs its own signal.** Deployment smoke uses `PBE_SMOKE_BYPASS_SECRET`, so it never proves the production `TURNSTILE_SECRET_KEY` works, and the wide event recorded both "challenge issued" and "Siteverify rejected" as `fail`. A wrong or rotated secret would have passed smoke while every new session's first run failed. Turnstile Spin's "Fix with Spin" banner is Cloudflare noticing widgets that serve traffic without working server-side validation; the self-hosted equivalent is `challenged` versus `fail` outcomes plus Siteverify `error_codes`, with `invalid-input-secret` reported by `scripts/learner_report.py` as a configuration alert rather than a bot failure. Verify the signal against the live service, not a stub: real Siteverify returns `invalid-input-secret` and `missing-input-secret` with HTTP 400, so the common `if (!response.ok) throw` pattern (Spin's reference handler included) discards the one code that names the misconfiguration. Unit stubs had assumed a 200. The deploy-time half of the fix is a smoke-gated probe (`POST /__smoke/turnstile`) that sends the production secret with Cloudflare's dummy token. Classify on more than the error code: Cloudflare's always-fail test secret answers the dummy token with the same `invalid-input-response` as a working production secret, and only `metadata.result_with_testing_key` tells them apart.
 - **Check hand-rolled security code against the vendor's reference contract.** Reading the Turnstile Spin skill's canonical Siteverify handler beside `_verify_turnstile` found three gaps no test had asked about: no timeout, no 2048-character token bound, and a `null` hostname raising `AttributeError` (a 500) instead of failing closed. Use the reference as a checklist, and keep deliberate divergences written down: Invisible mode, session clearance instead of per-request verification, and the serving hostname instead of a configured allowlist (safe only while `workers.dev` and preview URLs stay disabled).
 - **Credential-bearing commands run code from the dependency tree.** Turnstile Spin refuses to run `secret put` or other credential-bearing commands through `npx`, package scripts, or a project-local binary. `make deploy` runs the repository-pinned Wrangler with the account's credentials, and Dependabot now proposes npm updates weekly. Exact pins, the three-day cooldown, and `npm ci --ignore-scripts` limit the exposure; review Wrangler and Miniflare bumps as credential-bearing changes, not routine ones.
+- Geometry contracts cannot see a wrong label. The bytes-and-bytearray figure rendered doubled backslashes, and bytes the example never used, for months while every clipping, collision, palette and accent contract passed; the regular-expressions figure drew a pattern the example never uses. Contract 13 now requires that escape sequences in a figure appear in the example source and that no rendered text carries a doubled backslash. A wider check (every code-like mono label must appear in the example) flags 54 of 115 attachments; three of those drew values the example never computes (`factorial(3)` on a page that sums a tree, keys `a` to `d` on a page whose dict holds `name` and `language`) and were redrawn from the cell. Placeholders such as `[a,b,c]` are allowed by the rubric and were left.
+- A score that every figure passes by the same margin cannot say what to redesign next. The v1 figure rubric saturated at 8.5, was rewritten, and v2 saturated at 9.0 (106 of 109). Rank the gestalt pairwise to choose the next redesign, and keep the score as the minimum.
+- A weak figure is redrawn, not removed. Four shipped figures (`values`, `literals`, `logging`, `collections-module`) were rows of `name | role`, and the first fix deleted them and recorded a rationale for each. A page that had a picture and now has a paragraph about a better picture has lost something, and the owner said so. `values` and `logging` were redrawn as mechanisms in the same pull request; `literals` and `collections-module` keep their tables at 8.5 until a mechanism replaces them. The `no_figure_rationales` registry is for pages whose lesson has no drawable mechanism.
+- Inline SVG inherits CSS custom properties, so figures should paint with `var(--fig-*)` tokens rather than literal colours. The dark-mode "paper chip" was a workaround for a palette baked into the grammar; once the tokens moved to `site.css` the chip, the second palette and the seam between figure and page all disappeared. Any shell that embeds a figure outside the site stylesheet (gestalt pages, social cards) must define the tokens itself.
+- Do not ask for fonts the page never loads. The grammar requested JetBrains Mono and Source Sans while the site shipped no web fonts, so which faces a visitor saw was decided by their OS, and the italic serif identifiers were the only serif on the page. Figure faces now follow the page's own stacks, and mono runs are pinned with `textLength` so divider math computed from `MONO_ADVANCE` holds on every platform.
+- Several selector figures accented the third branch because a loop variable happened to be true there. When the caption names no single element the figure gets zero accents; the one-accent contract already allowed zero and the rubric now says so.
+- An arrow shorter than about three times its head reads as a wedge between two boxes. `ARROW_MIN` (20 units) and Contract 14 keep the census in the grammar because the emitted shaft is already shortened by the head.
+- A paint function that takes the lesson's names removes the choice between reuse and fidelity. `_bind_figure("MAX_RETRIES", "int", "3")` and `_bind_figure("message", "str", '"hi"')` share one mechanism and each match the cell they sit under.
 
 ## Discoverability, theming, and learner analytics
 
diff --git a/docs/pr-evidence/README.md b/docs/pr-evidence/README.md
index bbbee45..72e8607 100644
--- a/docs/pr-evidence/README.md
+++ b/docs/pr-evidence/README.md
@@ -1,5 +1,33 @@
 # PR visual evidence
 
+## Diagram upgrade (2026-09-27)
+
+Before/after contact sheet of every figure whose drawing changed on the
+`claude/diagram-upgrade` branch relative to `main`, in both colour schemes.
+Rows are grouped: twelve redrawn figures to judge, nine adjusted figures (an
+arrow lengthened or an accent removed) to glance at. Each row carries a note
+from `diagram-upgrade-contact-sheet-notes.json` saying what changed and why.
+The base column in the dark sheet sits on the light paper chip the site used
+to draw; the head column is recoloured through the `--fig-*` tokens.
+
+| Evidence | Review point | Base | SHA-256 |
+| --- | --- | --- | --- |
+| [Light contact sheet](diagram-upgrade-contact-sheet-light.png) | 21 changed figure rows with element counts, shipped captions and per-row notes. | `main` (`3f300af`) | `55fc7a56bc03ef2841dc0bcf099b98911f667e56b3de7799414c90d1075b8abf` |
+| [Dark contact sheet](diagram-upgrade-contact-sheet-dark.png) | The same rows under `prefers-color-scheme: dark`: paper chip before, token recolouring after. | `main` (`3f300af`) | `d407aa9aaee7e943cc48887ecf1cd25adb4463eee9eeb3e0715482a8233cd611` |
+
+Regenerate both from the branch with:
+
+```bash
+uv run --python 3.13 scripts/build_figure_contact_sheet.py --base main \
+    --output docs/pr-evidence/diagram-upgrade-contact-sheet \
+    --notes docs/pr-evidence/diagram-upgrade-contact-sheet-notes.json
+```
+
+The script extracts the base revision with `git archive`, renders every attached
+figure from both trees, ignores colour, font and text-length attributes when
+deciding what changed, and captures the sheet through
+`scripts/capture_browser_screenshot.mjs`. The per-criterion scores for the
+redrawn figures are in `docs/rubric-audit-2026-09-27.md`.
 ## Turnstile rejection loop (2026-09-26)
 
 These captures show `/examples/values` six seconds after one Run click, with Siteverify rejecting every token. Both Workers used Cloudflare's invisible always-pass test site key (`1x00000000000000000000BB`), so the real Turnstile widget loaded and solved in the browser, and the always-fail test secret (`2x0000000000000000000000000000000AA`), so Siteverify rejected every solved token.
diff --git a/docs/pr-evidence/diagram-upgrade-contact-sheet-dark.png b/docs/pr-evidence/diagram-upgrade-contact-sheet-dark.png
new file mode 100644
index 0000000..1f1f4d9
Binary files /dev/null and b/docs/pr-evidence/diagram-upgrade-contact-sheet-dark.png differ
diff --git a/docs/pr-evidence/diagram-upgrade-contact-sheet-light.png b/docs/pr-evidence/diagram-upgrade-contact-sheet-light.png
new file mode 100644
index 0000000..6b62c80
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diff --git a/docs/pr-evidence/diagram-upgrade-contact-sheet-notes.json b/docs/pr-evidence/diagram-upgrade-contact-sheet-notes.json
new file mode 100644
index 0000000..4b52f93
--- /dev/null
+++ b/docs/pr-evidence/diagram-upgrade-contact-sheet-notes.json
@@ -0,0 +1,23 @@
+{
+  "variables": "Same mechanism, the cell's own name and value: message → \"hi\" instead of x → 42.",
+  "constants": "Same mechanism, the cell's own name and value: MAX_RETRIES → 3; the name box widens to fit.",
+  "closures": "Environment diagram. The returned frame is ghosted; double names a function object whose __closure__ points back into it.",
+  "generators": "State over time: one ribbon per next() call the cell makes on countdown(3), with the local n beside each row.",
+  "string-formatting": "Railroad tracing the cell's 05.1f. Visited stations shaded; skipped stations ghosted under a bypass rail.",
+  "bytes-and-bytearray": "The example's real bytes as integer slots, the in-place write shown. The old figure drew bytes the example never uses, with doubled backslashes. Anchor moved to the cell that mutates packet.",
+  "regular-expressions": "The cell's own pattern; capture groups dropped onto the record they extract. The old figure drew a pattern the example never uses.",
+  "values": "The cell's binding text → str plus the type() hop to the class where upper() lives, replacing four stacked typed boxes.",
+  "logging": "The cell's three records crossing the handler's INFO gate; debug stops at the gate. Replaces the five-level lookup table.",
+  "decorators": "Arrow in the 'before' row lengthened from 16 to 22 units.",
+  "recursion": "The example's own tree at the deepest frame of total(tree), with the values each frame returns. The old figure drew factorial(3), which the example never computes.",
+  "type-aliases": "Arrow lengthened from 16 to 22 units; the Index box moves down 6.",
+  "multiple-return-values": "Both arrows lengthened from 18 to 22 units.",
+  "match-statements": "First-match arrow lengthened from 14 to 20 units.",
+  "assignment-expressions": "Case boxes spread so the arrows between them are 22 units; the accent on the middle case removed.",
+  "container-protocols": "Accent and soft fill removed from the middle row; the caption names all three routes equally.",
+  "journey section · Choose the right loop shape.": "Accent and soft fill removed from the sentinel row; the caption names no single loop.",
+  "journey section · Describe realistic data shapes.": "Accent and soft fill removed from the Union row.",
+  "journey section · Make failure explicit.": "Accent and soft fill removed from the except row.",
+  "dicts": "The cell's own keys hashed to slots, with the insert of \"year\" accented. The old figure drew keys a to d and a collision the example never shows.",
+  "sentinel-iteration": "The cell's read_chunk and its chunks \"py\", \"thon\", \"\". The old figure drew iter(read, '') with placeholder values."
+}
diff --git a/docs/quality-registries.toml b/docs/quality-registries.toml
index 492aa7f..1ba768b 100644
--- a/docs/quality-registries.toml
+++ b/docs/quality-registries.toml
@@ -199,8 +199,9 @@ expires = "2026-12-01"
 [no_figure_rationales]
 # Slugs may be added here only when the page is constraint-shaped,
 # infrastructure-shaped, or aggregator-shaped and a single mechanism
-# figure would distort the lesson. Current production attaches figures
-# to every example, so this registry is intentionally empty.
+# figure would distort the lesson. A weak figure is redrawn, not removed:
+# a page that had a figure keeps one. Current production attaches
+# figures to every example, so this registry is intentionally empty.
 
 [journey_outcomes]
 
@@ -1381,7 +1382,7 @@ caption = "Lists are mutable sequences. `.append` extends the same list object 
 slug = "dicts"
 anchor = "cell-0"
 figure = "dict-buckets"
-caption = "Each key is hashed to a bucket; collisions chain into the next slot. Lookup is constant-time on average."
+caption = "hash(key) picks the slot: \"year\" lands in an empty one, and profile[\"name\"] goes straight to its slot without scanning the other entries."
 
 [[figure_attachments]]
 slug = "unpacking"
@@ -1429,7 +1430,7 @@ caption = "@dec rebinds the name to wrapper(f₀); the original function survive
 slug = "recursion"
 anchor = "cell-1"
 figure = "call-stack"
-caption = "Each call pushes a new frame with the same name and a smaller argument; the base case unwinds back up the stack."
+caption = "At the leaf with value 4, three frames of total are stacked, each waiting on the one below; unwinding returns 4, then 3 + 4 = 7, then 1 + 2 + 7 = 10."
 
 [[figure_attachments]]
 slug = "exception-chaining"
@@ -1507,7 +1508,7 @@ caption = "In the same signature, the bare `*` works the other way: parameters a
 slug = "closures"
 anchor = "cell-0"
 figure = "closure-cell"
-caption = "The inner function keeps a reference into the outer scope's cell, so the captured factor survives the outer return."
+caption = "make_multiplier(2) has returned, but the function object double names still points into that frame's cell, so the captured factor outlives the call."
 
 [[figure_attachments]]
 slug = "scope-global-nonlocal"
@@ -1518,8 +1519,8 @@ caption = "Name lookup walks LEGB — local, enclosing, global, built-in — out
 [[figure_attachments]]
 slug = "generators"
 anchor = "cell-0"
-figure = "generator-ribbon"
-caption = "A generator's body is a timeline cut by yield gates: each next() advances to the next gate; locals survive the pause."
+figure = "generator-resume"
+caption = "The cell's two next() calls on countdown(3), one timeline each: every call resumes the body to the next yield gate, and the local n survives the pause."
 
 [[figure_attachments]]
 slug = "type-hints"
@@ -1655,15 +1656,15 @@ caption = "Early returns handle the exceptional cases first so the main work is
 
 [[figure_attachments]]
 slug = "bytes-and-bytearray"
-anchor = "cell-0"
+anchor = "cell-3"
 figure = "bytes-vs-bytearray"
-caption = "bytes is a frozen sequence of integers; bytearray is the mutable counterpart with append/extend/etc."
+caption = "Both objects hold the same two bytes as integers; b\"py\" cannot change, while packet[0] = ord(\"P\") rewrites the first slot of the bytearray in place."
 
 [[figure_attachments]]
 slug = "sentinel-iteration"
 anchor = "cell-0"
 figure = "sentinel-iteration"
-caption = "`iter(callable, sentinel)` calls the callable repeatedly, stopping when it returns the sentinel."
+caption = "iter(read_chunk, \"\") keeps calling read_chunk and yields \"py\" and \"thon\"; the empty string is the sentinel, so it stops the loop and is never yielded."
 
 [[figure_attachments]]
 slug = "partial-functions"
@@ -1746,8 +1747,8 @@ caption = "Six type pairs bridge the JSON text boundary; each json value maps to
 [[figure_attachments]]
 slug = "regular-expressions"
 anchor = "cell-0"
-figure = "regex-anchors"
-caption = "^ and $ anchor the pattern; quantifiers like {2} bound how many times a token repeats."
+figure = "regex-groups"
+caption = "findall returns only what the parentheses capture: `([A-Za-z]+)` takes the name and `(\\d+)` the score, one (name, score) pair per record."
 
 [[figure_attachments]]
 slug = "number-parsing"
@@ -1759,7 +1760,7 @@ caption = "int() turns text into a typed number; malformed input raises ValueErr
 slug = "string-formatting"
 anchor = "cell-1"
 figure = "format-spec"
-caption = "The format spec is a railroad of named optional fields: alignment, sign, width, precision, type."
+caption = "The format spec is a railroad of optional stations in a fixed order; this cell's 05.1f visits zero-pad, width, precision and type and bypasses the rest."
 
 [[figure_attachments]]
 slug = "truthiness"
@@ -1791,12 +1792,6 @@ anchor = "cell-3"
 figure = "list-append"
 caption = "A list is the other intent: a variable number of similar items, growing in place with `.append`."
 
-[[figure_attachments]]
-slug = "values"
-anchor = "cell-0"
-figure = "value-types"
-caption = "Every literal is an object with a type; the type carries the behaviour, not the variable name."
-
 [[figure_attachments]]
 slug = "yield-from"
 anchor = "cell-0"
@@ -1902,9 +1897,33 @@ caption = "A function takes inputs, evaluates a body, and returns a value: `gree
 [[figure_attachments]]
 slug = "constants"
 anchor = "cell-0"
-figure = "variables-bind"
+figure = "constants-bind"
 caption = "UPPER_CASE is a naming convention, not a language constraint; the binding behaves like any other variable."
 
+[[figure_attachments]]
+slug = "values"
+anchor = "cell-0"
+figure = "value-type-lookup"
+caption = "text names a str object, and type(text) is str: the type carries upper() and the rest of the behaviour, not the name."
+
+[[figure_attachments]]
+slug = "literals"
+anchor = "cell-0"
+figure = "literal-forms"
+caption = "Each Python type has its own literal spellings; ints accept decimal, hex, and binary; strings accept either quote."
+
+[[figure_attachments]]
+slug = "logging"
+anchor = "cell-0"
+figure = "logging-threshold"
+caption = "The handler's level is a gate: debug is below INFO and never reaches stdout, while info and warning pass through unchanged."
+
+[[figure_attachments]]
+slug = "collections-module"
+anchor = "cell-0"
+figure = "collections-containers"
+caption = "Four specialised containers for shapes the built-in types don't cover well: deque, Counter, defaultdict, namedtuple."
+
 [[figure_attachments]]
 slug = "while-loops"
 anchor = "cell-0"
@@ -1923,12 +1942,6 @@ anchor = "cell-0"
 figure = "match-pattern-variants"
 caption = "Capture, alternative, guard, and class patterns each name a different way a value can match a case."
 
-[[figure_attachments]]
-slug = "literals"
-anchor = "cell-0"
-figure = "literal-forms"
-caption = "Each Python type has its own literal spellings; ints accept decimal, hex, and binary; strings accept either quote."
-
 [[figure_attachments]]
 slug = "packages"
 anchor = "cell-0"
@@ -1947,12 +1960,6 @@ anchor = "cell-0"
 figure = "subprocess-spawn"
 caption = "subprocess.run spawns a child process and captures its stdout, stderr, and exit code as portable evidence."
 
-[[figure_attachments]]
-slug = "logging"
-anchor = "cell-0"
-figure = "logging-levels"
-caption = "Five severity levels; the logger's configured threshold drops everything below it."
-
 [[figure_attachments]]
 slug = "testing"
 anchor = "cell-0"
@@ -2013,12 +2020,6 @@ anchor = "cell-0"
 figure = "isinstance-check"
 caption = "isinstance and issubclass ask the runtime; the answer is a bool, not a static type refinement."
 
-[[figure_attachments]]
-slug = "collections-module"
-anchor = "cell-0"
-figure = "collections-containers"
-caption = "Four specialised containers for shapes the built-in types don't cover well: deque, Counter, defaultdict, namedtuple."
-
 [[figure_attachments]]
 slug = "structured-data-shapes"
 anchor = "cell-0"
@@ -2217,8 +2218,8 @@ comment = "signature with explicit `/` separator"
 
 [[example_figure_scores]]
 slug = "closures"
-score = 9.0
-comment = "captured cell reference"
+score = 9.5
+comment = "environment diagram: ghosted returned frame, heap function object, one live __closure__ reference; 1.5/1/0.75/1/1 · 1/1/1 · 1/0.5"
 
 [[example_figure_scores]]
 slug = "scope-global-nonlocal"
@@ -2228,7 +2229,7 @@ comment = "LEGB nested rings"
 [[example_figure_scores]]
 slug = "recursion"
 score = 9.0
-comment = "stacked frames with same name, different argument"
+comment = "the example's own tree at its deepest frame, return values unwinding; earns-place 0.75, the cell's output already gives 10; 1.5/0.75/1/1/1 · 1/1/1 · 1/0.5"
 
 [[example_figure_scores]]
 slug = "lists"
@@ -2238,7 +2239,7 @@ comment = "cells with append mechanism"
 [[example_figure_scores]]
 slug = "dicts"
 score = 9.0
-comment = "hash buckets with collision chain"
+comment = "the cell's own keys hashed to slots, the insert of \"year\" accented; earns-place 0.75, one-move 0.75 since insert and lookup share the caption; 1.5/0.75/0.75/1/1 · 1/1/1 · 1/0.5"
 
 [[example_figure_scores]]
 slug = "slices"
@@ -2257,8 +2258,8 @@ comment = "ghost annotations over runtime values"
 
 [[example_figure_scores]]
 slug = "generators"
-score = 9.0
-comment = "ribbon cut by yield gates"
+score = 9.5
+comment = "the cell's two next() ribbons on countdown(3), local n shown surviving; earns-place 0.75, the prose says the same; 1.5/0.75/1/1/1 · 1/1/1 · 1/0.5"
 
 [[example_figure_scores]]
 slug = "exceptions"
@@ -2393,12 +2394,12 @@ comment = "function literal: params / expression"
 [[example_figure_scores]]
 slug = "string-formatting"
 score = 9.0
-comment = "format-spec railroad"
+comment = "railroad tracing the cell's 05.1f; one-move 0.75, restraint 0.75 and fit 0.75: still the densest figure in the set at the banner ceiling; 1.5/1/0.75/1/1 · 1/1/0.75 · 0.75/0.5"
 
 [[example_figure_scores]]
 slug = "regular-expressions"
 score = 9.0
-comment = "pattern ruler with anchors"
+comment = "the cell's pattern with both capture groups dropped onto Ada: 10; one-move 0.75 and restraint 0.75 for two rows plus two drops; 1.5/1/0.75/1/1 · 1/1/0.75 · 1/0.5"
 
 [[example_figure_scores]]
 slug = "json"
@@ -2415,16 +2416,6 @@ slug = "datetime"
 score = 9.0
 comment = "one instant, two clock offsets"
 
-[[example_figure_scores]]
-slug = "values"
-score = 9.0
-comment = "every literal is a typed object"
-
-[[example_figure_scores]]
-slug = "literals"
-score = 9.0
-comment = "literal spellings per type"
-
 [[example_figure_scores]]
 slug = "booleans"
 score = 9.0
@@ -2498,7 +2489,27 @@ comment = "specific call: greet('Ada') → 'Hello, Ada'"
 [[example_figure_scores]]
 slug = "constants"
 score = 9.0
-comment = "name binding; UPPER_CASE is convention"
+comment = "name binding with the cell's own MAX_RETRIES → 3; earns-place 0.5, the prose already says it is an ordinary binding; 1.5/0.5/1/1/1 · 1/1/1 · 1/0.5"
+
+[[example_figure_scores]]
+slug = "values"
+score = 9.0
+comment = "text → str binding plus the type() hop to where upper() lives; earns-place 0.75 since the cell prints type(text), one-move 0.75; 1.5/0.75/0.75/1/1 · 1/1/1 · 1/0.5"
+
+[[example_figure_scores]]
+slug = "literals"
+score = 8.5
+comment = "literal spellings per type; a reference table, kept until a mechanism figure replaces it"
+
+[[example_figure_scores]]
+slug = "logging"
+score = 9.5
+comment = "the cell's three records crossing the handler's INFO gate, debug dropped; earns-place 0.75 since the output already shows the drop; 1.5/0.75/1/1/1 · 1/1/1 · 1/0.5"
+
+[[example_figure_scores]]
+slug = "collections-module"
+score = 8.5
+comment = "deque / Counter / defaultdict / namedtuple; a catalogue, kept until the page is split"
 
 [[example_figure_scores]]
 slug = "import-aliases"
@@ -2567,13 +2578,13 @@ comment = "__bool__ → __len__ → True fallback chain"
 
 [[example_figure_scores]]
 slug = "bytes-and-bytearray"
-score = 9.0
-comment = "frozen vs mutable contrast"
+score = 9.5
+comment = "the example's two bytes as integer slots, packet[0] rewritten in place, anchored to the mutating cell; 1.5/0.75/1/1/1 · 1/1/1 · 1/0.5"
 
 [[example_figure_scores]]
 slug = "sentinel-iteration"
 score = 9.0
-comment = "iter(callable, sentinel) stop condition"
+comment = "the cell's read_chunk and chunks; the empty string ghosted as the sentinel; earns-place 0.75, the output already omits it; 1.5/0.75/1/1/1 · 1/1/1 · 1/0.5"
 
 [[example_figure_scores]]
 slug = "partial-functions"
@@ -2600,11 +2611,6 @@ slug = "subprocesses"
 score = 9.0
 comment = "spawn → child → captured output"
 
-[[example_figure_scores]]
-slug = "logging"
-score = 9.0
-comment = "five thresholded levels"
-
 [[example_figure_scores]]
 slug = "testing"
 score = 9.0
@@ -2640,11 +2646,6 @@ slug = "runtime-type-checks"
 score = 9.0
 comment = "isinstance returns bool"
 
-[[example_figure_scores]]
-slug = "collections-module"
-score = 9.0
-comment = "deque / Counter / defaultdict / namedtuple"
-
 [[example_figure_scores]]
 slug = "structured-data-shapes"
 score = 9.0
diff --git a/docs/rubric-audit-2026-09-27.md b/docs/rubric-audit-2026-09-27.md
new file mode 100644
index 0000000..1b7c49d
--- /dev/null
+++ b/docs/rubric-audit-2026-09-27.md
@@ -0,0 +1,234 @@
+# Rubric audit snapshot — 2026-09-29
+
+This snapshot puts the catalog's quality ledgers beside each other for an editorial pass. Every number is computed from the live registries at generation time; rows marked CURATED are editorial judgements that the audit pass must re-affirm by review — this report does not validate them.
+
+## Scoreboard
+
+- Examples: count=109, min=7.1, avg=8.98, median=9, below9=1, distribution=7.1 × 1, 9 × 108
+- Example diagrams: count=109, min=8.5, avg=9.02, median=9, below9=2, distribution=8.5 × 2, 9 × 100, 9.5 × 7
+- Journey diagrams: count=21, min=9, avg=9.02, median=9, below9=0, distribution=9 × 20, 9.5 × 1
+- Accepted waiver: `hello-world` at 7.1 (floor 7.0, expires 2026-12-01).
+- Graph health: 109 linked sources, 361 edges, 0 orphaned examples.
+
+## Example rubric dimensions
+
+| Dimension | Evidence | Result |
+| --- | --- | --- |
+| Conceptual payoff | Curated score registry + criterion search | CURATED (re-affirm by review) |
+| Rationale | Criterion search + notes-supported gate | GATED by check_notes_supported |
+| Alternatives and boundaries | Confusable pairs, footguns, broad tours, graph edges | GATED by quality-checks |
+| Executable determinism | `verify_examples.py` over every program and cell | GATED by verify-examples |
+| Python idiom and accuracy | Python 3.13 verification, docs links, Ruff | GATED by verify-examples + lint |
+| Literate fit | Markdown parser requires prose beside every cell | GATED by the loader |
+| Source/result pairing | Every runnable cell carries expected output | GATED by verify-examples |
+| Concept decomposition | Criterion search + curated score floor | CURATED (re-affirm by review) |
+| Progressive walkthrough | Cell sequence review + criterion search | CURATED (re-affirm by review) |
+| Representative coverage | Broad-surface and syntax-surface gates | GATED by check_broad_surface_tours |
+| Practical usefulness | Criterion search + editorial score comments | CURATED (re-affirm by review) |
+| Editorial progression | Quality registry + graph audit | GATED by audit_example_graph |
+
+## Example-figure rubric dimensions
+
+| Dimension | Evidence | Result |
+| --- | --- | --- |
+| Cell fidelity | Attachment anchor resolves to a real rendered cell | GATED by FigureAnchorContract |
+| Earns its place | Curated figure scores | CURATED (re-affirm by review) |
+| One conceptual move | Figure score rationale + emphasis-scarcity contract | CURATED + accent contract |
+| Mechanism over metaphor | Canvas grammar uses bindings, arrows, cells, lanes, boundaries | CURATED (re-affirm by review) |
+| Caption quality | Unique, complete-sentence figcaptions | GATED by FigureCaptionContract |
+| Grammar conformance | Palette, font, and stroke contracts | GATED by geometry contracts |
+| Emphasis scarcity | At most one accent mark per figure | GATED by FigureEmphasisScarcityContract |
+| Restraint | Locked primitive grammar; no bespoke SVG | GATED by the grammar's surface |
+| Banner-row fit | Intrinsic-width contract | GATED by FigureSizeContract |
+| Pairs with surrounding cell | Caption/figure agreement on the marginalia gestalt | CURATED (re-affirm by review) |
+
+## Journey-visualisation rubric dimensions
+
+| Dimension | Evidence | Result |
+| --- | --- | --- |
+| Section fidelity | Section figure keyed by journey section title | GATED by SectionFigureContract |
+| Pedagogical scope | Section-level captions and score rationales | CURATED (re-affirm by review) |
+| One conceptual move | One figure per section and one emphasis mark | GATED + CURATED |
+| Mechanism over metaphor | Canvas primitives show protocols, boundaries, lanes, or flows | CURATED (re-affirm by review) |
+| Caption alignment | Section figure captions unique and declarative | GATED by FigureCaptionContract |
+| Grammar conformance | Shared geometry contracts | GATED by geometry contracts |
+| Independence from lesson figures | Section figures compared with example attachments | computed: no reuse |
+| Layout fit | Journey figure dimensions within production column | GATED by FigureSizeContract |
+| Outcome support | `check_journey_outcomes.py` over all journey sections | GATED by check_journey_outcomes |
+| Prerequisite order | Journey order reviewed against lesson dependencies | CURATED (re-affirm by review) |
+
+## Example and diagram inventory
+
+| Slug | Quality | Heuristic | Cells | Notes | Edges | Figure | Anchor | Fig score | Weakest heuristic axes |
+| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
+| hello-world | 7.1 | 8.3 | 1 | 2 | 2 | program-output | cell-0 | 9.0 | alternatives_and_boundaries=0.25, concept_decomposition=0.58, representative_coverage=0.65 |
+| values | 9.0 | 9.3 | 3 | 3 | 4 | value-type-lookup | cell-0 | 9.0 | alternatives_and_boundaries=0.25, practical_usefulness=0.80, conceptual_payoff=1.00 |
+| literals | 9.0 | 9.6 | 6 | 4 | 4 | literal-forms | cell-0 | 8.5 | alternatives_and_boundaries=0.50, conceptual_payoff=0.97, rationale=1.00 |
+| numbers | 9.0 | 9.4 | 4 | 4 | 2 | number-lines | cell-0 | 9.0 | alternatives_and_boundaries=0.50, practical_usefulness=0.80, conceptual_payoff=0.90 |
+| booleans | 9.0 | 9.8 | 3 | 4 | 3 | boolean-truth-table | cell-0 | 9.0 | alternatives_and_boundaries=0.70, conceptual_payoff=1.00, rationale=1.00 |
+| operators | 9.0 | 9.5 | 6 | 4 | 4 | expression-tree | cell-0 | 9.0 | alternatives_and_boundaries=0.50, conceptual_payoff=0.90, rationale=1.00 |
+| none | 9.0 | 9.6 | 3 | 3 | 4 | none-singleton | cell-0 | 9.0 | alternatives_and_boundaries=0.50, conceptual_payoff=0.97, rationale=1.00 |
+| variables | 9.0 | 9.3 | 3 | 3 | 4 | variables-bind | cell-0 | 9.5 | alternatives_and_boundaries=0.50, conceptual_payoff=0.80, practical_usefulness=0.80 |
+| constants | 9.0 | 9.4 | 3 | 3 | 3 | constants-bind | cell-0 | 9.0 | alternatives_and_boundaries=0.50, practical_usefulness=0.80, conceptual_payoff=0.97 |
+| truthiness | 9.0 | 9.5 | 3 | 2 | 4 | truthy-check | cell-0 | 9.0 | alternatives_and_boundaries=0.50, conceptual_payoff=0.87, rationale=1.00 |
+| equality-and-identity | 9.0 | 9.4 | 4 | 4 | 4 | identity-and-equality | cell-0 | 9.0 | alternatives_and_boundaries=0.50, practical_usefulness=0.80, conceptual_payoff=0.90 |
+| mutability | 9.0 | 9.4 | 3 | 3 | 4 | 2 figures | — | — | alternatives_and_boundaries=0.50, practical_usefulness=0.80, conceptual_payoff=0.90 |
+| object-lifecycle | 9.0 | 8.7 | 2 | 3 | 3 | object-lifecycle | cell-0 | 9.0 | alternatives_and_boundaries=0.25, rationale=0.65, concept_decomposition=0.80 |
+| strings | 9.0 | 9.5 | 3 | 5 | 4 | codepoints-bytes | cell-0 | 9.0 | alternatives_and_boundaries=0.50, practical_usefulness=0.80, conceptual_payoff=1.00 |
+| bytes-and-bytearray | 9.0 | 9.5 | 4 | 4 | 3 | bytes-vs-bytearray | cell-3 | 9.5 | alternatives_and_boundaries=0.50, practical_usefulness=0.80, conceptual_payoff=1.00 |
+| string-formatting | 9.0 | 9.2 | 3 | 3 | 4 | format-spec | cell-1 | 9.0 | alternatives_and_boundaries=0.25, conceptual_payoff=0.80, rationale=1.00 |
+| conditionals | 9.0 | 9.3 | 3 | 3 | 4 | branch-fork | cell-0 | 9.0 | alternatives_and_boundaries=0.50, practical_usefulness=0.80, conceptual_payoff=0.87 |
+| guard-clauses | 9.0 | 9.2 | 2 | 3 | 3 | guard-clauses | cell-0 | 9.0 | alternatives_and_boundaries=0.50, concept_decomposition=0.80, representative_coverage=0.80 |
+| assignment-expressions | 9.0 | 9.2 | 2 | 3 | 3 | naming-decisions | cell-0 | 9.0 | alternatives_and_boundaries=0.70, concept_decomposition=0.80, representative_coverage=0.80 |
+| for-loops | 9.0 | 9.5 | 3 | 3 | 3 | iterator-unroll | cell-1 | 9.0 | alternatives_and_boundaries=0.50, conceptual_payoff=0.90, rationale=1.00 |
+| break-and-continue | 9.0 | 9.4 | 2 | 3 | 3 | early-exit | cell-0 | 9.0 | alternatives_and_boundaries=0.70, concept_decomposition=0.80, representative_coverage=0.80 |
+| loop-else | 9.0 | 9.3 | 2 | 3 | 3 | loop-else-gate | cell-0 | 9.0 | alternatives_and_boundaries=0.50, representative_coverage=0.75, concept_decomposition=0.80 |
+| iterating-over-iterables | 9.0 | 9.7 | 3 | 3 | 3 | iter-protocol | cell-0 | 9.0 | alternatives_and_boundaries=0.70, conceptual_payoff=0.93, rationale=1.00 |
+| iterators | 9.0 | 9.6 | 3 | 3 | 3 | iter-protocol | cell-0 | 9.0 | alternatives_and_boundaries=0.50, conceptual_payoff=0.93, rationale=1.00 |
+| iterator-vs-iterable | 9.0 | 9.6 | 4 | 3 | 3 | 2 figures | — | — | alternatives_and_boundaries=0.50, conceptual_payoff=0.97, rationale=1.00 |
+| sentinel-iteration | 9.0 | 9.1 | 2 | 3 | 3 | sentinel-iteration | cell-0 | 9.0 | alternatives_and_boundaries=0.50, representative_coverage=0.75, concept_decomposition=0.80 |
+| match-statements | 9.0 | 9.4 | 3 | 4 | 4 | match-dispatch-ladder | cell-0 | 9.0 | alternatives_and_boundaries=0.50, practical_usefulness=0.80, conceptual_payoff=0.93 |
+| advanced-match-patterns | 9.0 | 9.4 | 3 | 3 | 3 | match-pattern-variants | cell-0 | 9.0 | alternatives_and_boundaries=0.50, practical_usefulness=0.80, conceptual_payoff=0.90 |
+| while-loops | 9.0 | 9.2 | 2 | 3 | 3 | 2 figures | — | — | alternatives_and_boundaries=0.70, concept_decomposition=0.80, representative_coverage=0.80 |
+| lists | 9.0 | 9.3 | 3 | 3 | 4 | list-append | cell-0 | 9.0 | alternatives_and_boundaries=0.50, practical_usefulness=0.80, conceptual_payoff=0.87 |
+| tuples | 9.0 | 9.5 | 4 | 4 | 3 | 2 figures | — | — | alternatives_and_boundaries=0.50, conceptual_payoff=0.87, rationale=1.00 |
+| unpacking | 9.0 | 9.7 | 3 | 3 | 4 | unpacking-bind | cell-0 | 9.0 | alternatives_and_boundaries=0.70, conceptual_payoff=0.90, rationale=1.00 |
+| dicts | 9.0 | 9.6 | 4 | 4 | 4 | dict-buckets | cell-0 | 9.0 | alternatives_and_boundaries=0.50, conceptual_payoff=1.00, rationale=1.00 |
+| sets | 9.0 | 9.5 | 3 | 3 | 3 | set-buckets | cell-0 | 9.0 | alternatives_and_boundaries=0.70, practical_usefulness=0.80, conceptual_payoff=0.87 |
+| slices | 9.0 | 9.0 | 2 | 3 | 3 | slice-ruler | cell-0 | 9.0 | alternatives_and_boundaries=0.50, conceptual_payoff=0.80, concept_decomposition=0.80 |
+| comprehensions | 9.0 | 9.5 | 3 | 4 | 4 | comprehension-equivalence | cell-0 | 9.0 | alternatives_and_boundaries=0.50, conceptual_payoff=0.90, rationale=1.00 |
+| comprehension-patterns | 9.0 | 9.1 | 2 | 3 | 3 | comprehension-equivalence | cell-0 | 9.0 | alternatives_and_boundaries=0.70, representative_coverage=0.75, concept_decomposition=0.80 |
+| sorting | 9.0 | 9.6 | 3 | 3 | 3 | sort-stability | cell-1 | 9.0 | alternatives_and_boundaries=0.50, conceptual_payoff=1.00, rationale=1.00 |
+| collections-module | 9.0 | 9.8 | 3 | 3 | 4 | collections-containers | cell-0 | 8.5 | alternatives_and_boundaries=0.70, conceptual_payoff=1.00, rationale=1.00 |
+| copying-collections | 9.0 | 9.6 | 3 | 3 | 3 | aliasing-mutation | cell-0 | 9.5 | alternatives_and_boundaries=0.50, conceptual_payoff=0.93, rationale=1.00 |
+| functions | 9.0 | 9.4 | 4 | 4 | 4 | function-with-body | cell-0 | 9.0 | alternatives_and_boundaries=0.50, practical_usefulness=0.80, conceptual_payoff=0.97 |
+| keyword-only-arguments | 9.0 | 9.2 | 4 | 3 | 4 | kw-only-separator | cell-0 | 9.0 | alternatives_and_boundaries=0.25, practical_usefulness=0.80, conceptual_payoff=0.87 |
+| positional-only-parameters | 9.0 | 9.3 | 3 | 3 | 3 | 2 figures | — | — | alternatives_and_boundaries=0.50, conceptual_payoff=0.80, practical_usefulness=0.80 |
+| args-and-kwargs | 9.0 | 9.6 | 3 | 3 | 4 | args-kwargs | cell-0 | 9.0 | alternatives_and_boundaries=0.70, conceptual_payoff=0.80, rationale=1.00 |
+| multiple-return-values | 9.0 | 9.0 | 2 | 3 | 3 | multiple-return | cell-0 | 9.0 | alternatives_and_boundaries=0.50, concept_decomposition=0.80, representative_coverage=0.80 |
+| closures | 9.0 | 9.2 | 3 | 4 | 4 | closure-cell | cell-0 | 9.5 | alternatives_and_boundaries=0.25, practical_usefulness=0.80, conceptual_payoff=0.93 |
+| partial-functions | 9.0 | 9.6 | 3 | 3 | 3 | partial-functions | cell-0 | 9.0 | alternatives_and_boundaries=0.50, conceptual_payoff=0.93, rationale=1.00 |
+| scope-global-nonlocal | 9.0 | 9.2 | 2 | 3 | 3 | scope-rings | cell-0 | 9.0 | alternatives_and_boundaries=0.70, concept_decomposition=0.80, representative_coverage=0.80 |
+| recursion | 9.0 | 9.0 | 2 | 3 | 3 | call-stack | cell-1 | 9.0 | alternatives_and_boundaries=0.50, representative_coverage=0.75, concept_decomposition=0.80 |
+| lambdas | 9.0 | 9.7 | 3 | 3 | 3 | lambda-expression | cell-0 | 9.0 | alternatives_and_boundaries=0.70, conceptual_payoff=0.90, rationale=1.00 |
+| generators | 9.0 | 9.6 | 4 | 4 | 3 | generator-resume | cell-0 | 9.5 | alternatives_and_boundaries=0.70, practical_usefulness=0.80, conceptual_payoff=1.00 |
+| yield-from | 9.0 | 9.0 | 2 | 3 | 3 | yield-delegation | cell-0 | 9.0 | alternatives_and_boundaries=0.50, representative_coverage=0.75, concept_decomposition=0.80 |
+| generator-expressions | 9.0 | 9.4 | 3 | 3 | 4 | lazy-stream | cell-1 | 9.0 | alternatives_and_boundaries=0.50, practical_usefulness=0.80, conceptual_payoff=0.90 |
+| itertools | 9.0 | 9.6 | 3 | 4 | 4 | itertools-chain | cell-0 | 9.0 | alternatives_and_boundaries=0.50, conceptual_payoff=0.93, rationale=1.00 |
+| decorators | 9.0 | 9.2 | 3 | 3 | 4 | decorator-rebind | cell-0 | 9.0 | alternatives_and_boundaries=0.25, practical_usefulness=0.80, conceptual_payoff=0.93 |
+| classes | 9.0 | 9.4 | 4 | 5 | 4 | class-triangle | cell-0 | 9.0 | alternatives_and_boundaries=0.50, practical_usefulness=0.80, conceptual_payoff=0.90 |
+| inheritance-and-super | 9.0 | 9.2 | 2 | 3 | 4 | mro-chain | cell-0 | 9.0 | alternatives_and_boundaries=0.70, concept_decomposition=0.80, representative_coverage=0.80 |
+| classmethods-and-staticmethods | 9.0 | 9.5 | 4 | 4 | 3 | method-kinds | cell-0 | 9.0 | alternatives_and_boundaries=0.50, practical_usefulness=0.80, conceptual_payoff=1.00 |
+| dataclasses | 9.0 | 9.4 | 3 | 3 | 3 | dataclass-fields | cell-0 | 9.0 | alternatives_and_boundaries=0.25, conceptual_payoff=0.93, rationale=1.00 |
+| properties | 9.0 | 9.5 | 3 | 3 | 4 | property-fork | cell-0 | 9.0 | alternatives_and_boundaries=0.50, practical_usefulness=0.80, conceptual_payoff=1.00 |
+| special-methods | 9.0 | 9.5 | 8 | 6 | 4 | operator-dispatch | cell-0 | 9.0 | alternatives_and_boundaries=0.50, practical_usefulness=0.80, conceptual_payoff=1.00 |
+| truth-and-size | 9.0 | 9.6 | 3 | 3 | 3 | truth-and-size | cell-0 | 9.0 | alternatives_and_boundaries=0.70, practical_usefulness=0.80, conceptual_payoff=1.00 |
+| container-protocols | 9.0 | 9.7 | 3 | 3 | 3 | container-methods | cell-0 | 9.0 | alternatives_and_boundaries=0.70, conceptual_payoff=0.93, rationale=1.00 |
+| callable-objects | 9.0 | 9.5 | 3 | 3 | 4 | callable-objects | cell-0 | 9.0 | alternatives_and_boundaries=0.70, practical_usefulness=0.80, conceptual_payoff=0.87 |
+| operator-overloading | 9.0 | 9.4 | 3 | 3 | 3 | operator-dispatch | cell-0 | 9.0 | alternatives_and_boundaries=0.50, practical_usefulness=0.80, conceptual_payoff=0.97 |
+| attribute-access | 9.0 | 9.4 | 3 | 3 | 4 | attribute-lookup | cell-0 | 9.0 | alternatives_and_boundaries=0.50, practical_usefulness=0.80, conceptual_payoff=0.93 |
+| bound-and-unbound-methods | 9.0 | 9.4 | 4 | 5 | 4 | bound-unbound | cell-0 | 9.0 | alternatives_and_boundaries=0.50, practical_usefulness=0.80, conceptual_payoff=0.97 |
+| descriptors | 9.0 | 9.3 | 2 | 3 | 3 | descriptor-protocol | cell-0 | 9.0 | alternatives_and_boundaries=0.50, concept_decomposition=0.80, representative_coverage=0.80 |
+| metaclasses | 9.0 | 9.2 | 2 | 3 | 3 | 2 figures | — | — | alternatives_and_boundaries=0.70, concept_decomposition=0.80, representative_coverage=0.80 |
+| context-managers | 9.0 | 9.5 | 3 | 4 | 3 | context-bowtie | cell-0 | 9.0 | alternatives_and_boundaries=0.50, practical_usefulness=0.80, conceptual_payoff=1.00 |
+| delete-statements | 9.0 | 9.6 | 3 | 3 | 3 | delete-name-erased | cell-0 | 9.0 | alternatives_and_boundaries=0.50, conceptual_payoff=0.93, rationale=1.00 |
+| exceptions | 9.0 | 9.5 | 3 | 4 | 4 | exception-lanes | cell-0 | 9.0 | alternatives_and_boundaries=0.50, practical_usefulness=0.80, conceptual_payoff=1.00 |
+| assertions | 9.0 | 9.2 | 2 | 3 | 3 | assertion-check | cell-0 | 9.0 | alternatives_and_boundaries=0.50, representative_coverage=0.75, concept_decomposition=0.80 |
+| exception-chaining | 9.0 | 9.1 | 2 | 3 | 3 | exception-cause-context | cell-0 | 9.0 | alternatives_and_boundaries=0.50, concept_decomposition=0.80, representative_coverage=0.80 |
+| exception-groups | 9.0 | 9.1 | 2 | 3 | 3 | exception-group-peel | cell-0 | 9.0 | alternatives_and_boundaries=0.50, concept_decomposition=0.80, representative_coverage=0.80 |
+| warnings | 9.0 | 9.1 | 2 | 3 | 3 | warning-signal | cell-0 | 9.0 | alternatives_and_boundaries=0.50, concept_decomposition=0.80, representative_coverage=0.80 |
+| modules | 9.0 | 9.8 | 4 | 4 | 2 | sys-path-resolution | cell-0 | 9.0 | alternatives_and_boundaries=0.70, conceptual_payoff=1.00, rationale=1.00 |
+| import-aliases | 9.0 | 9.3 | 2 | 4 | 2 | import-alias | cell-0 | 9.0 | alternatives_and_boundaries=0.70, concept_decomposition=0.80, representative_coverage=0.80 |
+| packages | 9.0 | 9.8 | 4 | 4 | 3 | package-tree | cell-0 | 9.0 | alternatives_and_boundaries=0.70, conceptual_payoff=1.00, rationale=1.00 |
+| virtual-environments | 9.0 | 8.8 | 1 | 4 | 3 | venv-boundary | cell-0 | 9.0 | alternatives_and_boundaries=0.45, concept_decomposition=0.58, representative_coverage=0.75 |
+| type-hints | 9.0 | 9.6 | 5 | 5 | 4 | annotation-ghost | cell-0 | 9.0 | alternatives_and_boundaries=0.50, conceptual_payoff=0.97, rationale=1.00 |
+| runtime-type-checks | 9.0 | 9.6 | 3 | 3 | 4 | isinstance-check | cell-0 | 9.0 | alternatives_and_boundaries=0.70, practical_usefulness=0.80, conceptual_payoff=0.93 |
+| union-and-optional-types | 9.0 | 9.6 | 3 | 3 | 3 | union-types | cell-0 | 9.0 | alternatives_and_boundaries=0.50, conceptual_payoff=0.93, rationale=1.00 |
+| type-aliases | 9.0 | 9.5 | 3 | 3 | 3 | type-alias-name | cell-0 | 9.0 | alternatives_and_boundaries=0.50, conceptual_payoff=0.83, rationale=1.00 |
+| typed-dicts | 9.0 | 9.6 | 3 | 3 | 4 | typed-dict-shape | cell-0 | 9.0 | alternatives_and_boundaries=0.50, conceptual_payoff=1.00, rationale=1.00 |
+| structured-data-shapes | 9.0 | 9.8 | 4 | 4 | 4 | structured-shapes | cell-0 | 9.0 | alternatives_and_boundaries=0.70, conceptual_payoff=1.00, rationale=1.00 |
+| literal-and-final | 9.0 | 9.4 | 3 | 3 | 4 | literal-constrained | cell-0 | 9.0 | alternatives_and_boundaries=0.50, practical_usefulness=0.80, conceptual_payoff=0.93 |
+| callable-types | 9.0 | 9.4 | 3 | 3 | 3 | callable-type | cell-0 | 9.0 | alternatives_and_boundaries=0.50, practical_usefulness=0.80, conceptual_payoff=0.90 |
+| generics-and-typevar | 9.0 | 9.6 | 3 | 4 | 3 | generic-preservation | cell-0 | 9.0 | alternatives_and_boundaries=0.50, conceptual_payoff=0.97, rationale=1.00 |
+| paramspec | 9.0 | 9.5 | 3 | 4 | 3 | paramspec-preserve | cell-0 | 9.0 | alternatives_and_boundaries=0.50, practical_usefulness=0.80, conceptual_payoff=1.00 |
+| overloads | 9.0 | 9.5 | 3 | 3 | 3 | overload-signatures | cell-0 | 9.0 | alternatives_and_boundaries=0.50, practical_usefulness=0.80, conceptual_payoff=1.00 |
+| casts-and-any | 9.0 | 9.7 | 3 | 3 | 3 | cast-escape | cell-0 | 9.0 | alternatives_and_boundaries=0.70, conceptual_payoff=0.97, rationale=1.00 |
+| newtype | 9.0 | 9.4 | 3 | 3 | 3 | newtype-phantom | cell-0 | 9.0 | alternatives_and_boundaries=0.50, practical_usefulness=0.80, conceptual_payoff=0.97 |
+| protocols | 9.0 | 9.7 | 3 | 3 | 4 | protocol-check | cell-0 | 9.0 | alternatives_and_boundaries=0.70, conceptual_payoff=0.93, rationale=1.00 |
+| abstract-base-classes | 9.0 | 9.6 | 4 | 4 | 3 | class-triangle | cell-0 | 9.0 | alternatives_and_boundaries=0.70, practical_usefulness=0.80, conceptual_payoff=1.00 |
+| enums | 9.0 | 9.2 | 2 | 4 | 3 | enum-members | cell-0 | 9.0 | alternatives_and_boundaries=0.70, concept_decomposition=0.80, representative_coverage=0.80 |
+| regular-expressions | 9.0 | 9.6 | 6 | 6 | 2 | regex-groups | cell-0 | 9.0 | alternatives_and_boundaries=0.50, conceptual_payoff=1.00, rationale=1.00 |
+| number-parsing | 9.0 | 9.4 | 3 | 3 | 3 | number-parse | cell-0 | 9.0 | alternatives_and_boundaries=0.50, practical_usefulness=0.80, conceptual_payoff=0.97 |
+| custom-exceptions | 9.0 | 9.1 | 3 | 3 | 4 | custom-exception-chain | cell-0 | 9.0 | alternatives_and_boundaries=0.50, rationale=0.65, practical_usefulness=0.80 |
+| json | 9.0 | 9.5 | 4 | 4 | 3 | json-python-mapping | cell-0 | 9.0 | alternatives_and_boundaries=0.50, practical_usefulness=0.80, conceptual_payoff=1.00 |
+| logging | 9.0 | 9.0 | 2 | 3 | 3 | logging-threshold | cell-0 | 9.5 | alternatives_and_boundaries=0.25, concept_decomposition=0.80, representative_coverage=0.80 |
+| testing | 9.0 | 9.4 | 3 | 3 | 3 | aaa-pattern | cell-0 | 9.0 | alternatives_and_boundaries=0.50, practical_usefulness=0.80, conceptual_payoff=0.97 |
+| subprocesses | 9.0 | 8.8 | 1 | 4 | 3 | subprocess-spawn | cell-0 | 9.0 | alternatives_and_boundaries=0.50, concept_decomposition=0.58, representative_coverage=0.75 |
+| threads-and-processes | 9.0 | 9.2 | 2 | 4 | 3 | gil-lanes | cell-0 | 9.0 | alternatives_and_boundaries=0.70, representative_coverage=0.75, concept_decomposition=0.80 |
+| networking | 9.0 | 8.7 | 1 | 4 | 3 | socket-byte-boundary | cell-0 | 9.0 | alternatives_and_boundaries=0.50, concept_decomposition=0.58, representative_coverage=0.75 |
+| datetime | 9.0 | 9.6 | 3 | 3 | 3 | datetime-instant | cell-0 | 9.0 | alternatives_and_boundaries=0.70, practical_usefulness=0.80, conceptual_payoff=1.00 |
+| csv-data | 9.0 | 9.6 | 3 | 3 | 3 | csv-records | cell-0 | 9.0 | alternatives_and_boundaries=0.50, conceptual_payoff=1.00, rationale=1.00 |
+| async-await | 9.0 | 9.6 | 5 | 4 | 3 | async-swimlane | cell-1 | 9.0 | alternatives_and_boundaries=0.70, practical_usefulness=0.80, conceptual_payoff=1.00 |
+| async-iteration-and-context | 9.0 | 9.4 | 3 | 3 | 3 | async-swimlane | cell-0 | 9.0 | alternatives_and_boundaries=0.50, practical_usefulness=0.80, conceptual_payoff=0.93 |
+
+## Journey section inventory
+
+| Journey | Section | Support examples | Outcomes | Figure | Score | Caption |
+| --- | --- | --- | --- | --- | --- | --- |
+| runtime | Start with executable evidence. | 5 | 4 | runtime-evidence-loop | 9.0 | Examples are evidence loops: source, a run step, and visible output stay together. |
+| runtime | Separate value, identity, and absence. | 6 | 4 | runtime-object-axes | 9.0 | Runtime objects answer separate questions: equal value, same identity, or the singleton that marks absence. |
+| runtime | Read expressions as object operations. | 5 | 4 | runtime-expression-model | 9.0 | Expression syntax enters the data model; object methods produce the result. |
+| control-flow | Choose between paths. | 4 | 4 | control-decision-map | 9.0 | Facts flow into one decision point; exactly one branch owns the next step. |
+| control-flow | Name and shape decisions. | 3 | 3 | control-fact-shape | 9.0 | Name a fact when a condition needs it; match shape when the data structure is the decision. |
+| control-flow | Stop as soon as the answer is known. | 3 | 3 | control-stop-boundary | 9.0 | Early exits draw a boundary: once the answer is found, the tail stays unread. |
+| iteration | Choose the right loop shape. | 5 | 4 | iteration-loop-selector | 9.0 | Choose the loop from its stopping rule: exhaustion, condition, or sentinel marker. |
+| iteration | See the protocol behind `for`. | 4 | 3 | iteration-protocol-map | 9.5 | for is surface syntax; iter() creates an iterator and next() pulls values until StopIteration. |
+| iteration | Compose lazy value streams. | 3 | 3 | iteration-lazy-pull | 9.0 | Lazy pipelines run from the consumer's pull: next() requests one value through each stage. |
+| shapes | Pick the container that matches the question. | 5 | 4 | container-questions | 9.0 | Each container answers a different question: ordered, fixed, lookup, unique. |
+| shapes | Move between shapes deliberately. | 6 | 4 | reshape-pipeline | 9.0 | Most everyday code reshapes data: one input, one transform, one new value. |
+| shapes | Cross text and data boundaries. | 5 | 4 | text-data-boundary | 9.0 | Programs receive text and produce structured data; parsing makes the boundary explicit. |
+| interfaces | Start with functions as named behavior. | 5 | 4 | function-signature | 9.0 | A function is the first abstraction boundary: arguments in, body, return value out. |
+| interfaces | Use functions as values. | 6 | 4 | function-as-value | 9.0 | Functions are first-class values. A second name binds to the same function object. |
+| interfaces | Bundle behavior with state. | 14 | 4 | class-with-state | 9.0 | Classes group fields and methods so data and behavior move together behind one interface. |
+| types | Keep runtime and static analysis separate. | 5 | 4 | type-runtime-static-split | 9.0 | Runtime values run the program; static tools inspect separate annotations and report before execution. |
+| types | Describe realistic data shapes. | 6 | 4 | type-shape-catalog | 9.0 | Real data contracts combine fields, variants, and expected absence instead of one scalar type. |
+| types | Scale annotations for reusable libraries. | 5 | 4 | type-library-contract | 9.0 | Reusable APIs carry caller contracts through the library boundary with generics, parameters, and overloads. |
+| reliability | Make failure explicit. | 6 | 4 | reliability-signal-map | 9.0 | Different failure shapes need explicit signals: assertions, recovery, chained causes, or warnings. |
+| reliability | Control resource and module boundaries. | 6 | 4 | reliability-boundary-map | 9.0 | Reliable programs name their boundaries: resources clean up, modules import, environments constrain runtime. |
+| reliability | Handle operations that outlive one expression. | 7 | 4 | reliability-operation-boundary | 9.0 | Async, threaded, test, and logging work cross an operation boundary before evidence comes back. |
+
+## Journey figure independence watchlist
+
+No journey section figures reuse production example paint functions.
+
+## Computed findings
+
+- No gate-blocking conditions detected in the computed ledgers.
+- Weakest example diagram score: 8.5; weakest journey diagram score: 9.
+
+CURATED dimensions above are not validated by this report; the audit pass owns re-affirming them (the marginalia gestalt page shows every figure with its production caption for exactly that review).
+
+## Curated: figures changed by the diagram upgrade (2026-09-30)
+
+Scored by hand against `docs/example-figure-rubric.md` v2. Columns are the ten criteria in rubric order: cell fidelity (1.5), earns its place (1.0), one conceptual move (1.0), mechanism over metaphor (1.0), caption quality (1.0) · grammar (1.0), emphasis scarcity (1.0), restraint (1.0) · banner fit (1.0), pairs with cell (0.5). The registry stores the total rounded down to the nearest half point.
+
+| slug | figure | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | total | where it loses |
+|---|---|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|---|
+| closures | closure-cell | 1.5 | 1.0 | 0.75 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 0.5 | 9.75 → 9.5 | Two frames and two arrows take a beat longer than two seconds to resolve. |
+| generators | generator-resume | 1.5 | 0.75 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 0.5 | 9.75 → 9.5 | The prose already says next() resumes to the next yield; the rows add the surviving local. Two rows now, matching the cell's two calls. |
+| string-formatting | format-spec | 1.5 | 1.0 | 0.75 | 1.0 | 1.0 | 1.0 | 1.0 | 0.75 | 0.75 | 0.5 | 9.25 → 9.0 | Densest figure in the set at the banner ceiling; the traced path and the grammar are two things to read. Scored below the row of boxes it replaced on density, above it on fidelity. |
+| bytes-and-bytearray | bytes-vs-bytearray | 1.5 | 0.75 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 0.5 | 9.75 → 9.5 | The cell's prose already states frozen versus mutable; the slots add only that bytes are integers. |
+| regular-expressions | regex-groups | 1.5 | 1.0 | 0.75 | 1.0 | 1.0 | 1.0 | 1.0 | 0.75 | 1.0 | 0.5 | 9.5 → 9.0 | Pattern row, text row and two drops read the move twice. Rounded down for the second reading. |
+| values | value-type-lookup | 1.5 | 0.75 | 0.75 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 0.5 | 9.5 → 9.0 | The cell prints `type(text).__name__`, so the hop restates code; binding plus hop is two small moves. |
+| logging | logging-threshold | 1.5 | 0.75 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 0.5 | 9.75 → 9.5 | The cell's output already shows `debug` missing; the gate makes the reason visible. |
+| recursion | call-stack | 1.5 | 0.75 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 0.5 | 9.75 → 9.5 | The cell's output already gives 10; the stack shows where 7 and 4 come from. Held at 9.0 in the registry until reviewed on the page. |
+| dicts | dict-buckets | 1.5 | 0.75 | 0.75 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 0.5 | 9.5 → 9.0 | Insert and lookup share one caption; the figure draws the insert. |
+| sentinel-iteration | sentinel-iteration | 1.5 | 0.75 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 0.5 | 9.75 → 9.5 | The output already omits the sentinel. Held at 9.0 in the registry until reviewed on the page. |
+| variables | variables-bind | 1.5 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 0.5 | 10.0 → 9.5 | Held at the previous 9.5: the drawing is unchanged apart from the cell's own name and value. |
+| constants | constants-bind | 1.5 | 0.5 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 0.5 | 9.5 → 9.0 | The prose says the binding behaves like any other, which is all the figure shows. |
+| literals | literal-forms | 1.5 | 0.5 | 0.5 | 0.5 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 0.5 | 8.5 | A table of spellings; kept because a page with a table beats a page with a note, queued for a mechanism. |
+| collections-module | collections-containers | 1.5 | 0.5 | 0.5 | 0.5 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 0.5 | 8.5 | A catalogue of four containers; same reasoning as `literals`. |
+
+The adjusted figures (arrow lengthened or arbitrary accent removed) keep their previous scores; the drawings are otherwise unchanged, and criterion 7 now reads the zero-accent selectors as correct rather than as missing emphasis.
+
+The library-wide check behind the recursion, dicts and sentinel redraws: of 115 attachments, 54 carry a code-like mono label that does not appear verbatim in the example's source. Most are formatting drift (`["python","workers"]` against `['python', 'workers']`) or placeholders the rubric allows (`[a,b,c]`, `obj.x`). The three redrawn here were the ones drawing values the example never computes; the rest are queued in `docs/diagram-upgrade-plan.md`.
diff --git a/docs/visual-explainer-spec.md b/docs/visual-explainer-spec.md
index ecdc813..0695522 100644
--- a/docs/visual-explainer-spec.md
+++ b/docs/visual-explainer-spec.md
@@ -61,7 +61,10 @@ Banner positions:
 | `after-walkthrough`| once, after the last cell             |
 
 Each position holds **one or more** figures via `cell-banner` markup.
-Captions are per-figure.
+Captions are per-figure. Each `figure` is a two-row subgrid (drawing,
+caption): in a pair of small multiples the drawings bottom-align in
+row one and both captions start on the same line in row two, even when
+one drawing is taller.
 
 ```html
 <section class="literate-program">
@@ -91,7 +94,7 @@ Captions are per-figure.
   justify-items: center;
 }
 .cell-banner figure   { margin: 0; padding: 0; max-width: 360px; }
-.cell-banner svg      { width: 100%; height: auto; display: block; }
+.cell-banner svg      { max-width: 100%; height: auto; display: block; }
 .cell-banner figcaption {
   margin-top: var(--space-2);
   color: var(--muted);
@@ -222,11 +225,30 @@ explicitly. Re-introducing either is a defect.
    explanation. Figures destined for promotion to the production
    registry must drop their inline prose first.
 
+3. **Figures paint with tokens, never literal colours.** `INK`,
+   `INK_SOFT`, `EMPHASIS` and `SOFT_FILL` are `var(--fig-*)`
+   references. Inline SVG inherits custom properties, so the page's
+   stylesheet decides the ink and one paint function is right in light
+   mode, dark mode, the gestalt pages and the social cards. There is
+   no paper chip. Any HTML shell that embeds a figure outside
+   `site.css` must define the tokens with
+   `figure_token_css(FIGURE_TOKENS_LIGHT)`; Contract 15 checks that
+   `site.css` carries both sets.
+
+4. **Typography follows the page and mono runs are pinned.** The
+   grammar's mono and sans stacks are the page's own (the site loads no
+   web fonts). `Canvas.mono` emits `textLength` with
+   `lengthAdjust="spacing"` so every mono run advances exactly
+   `MONO_ADVANCE` per character whatever face the platform resolves,
+   and a divider computed from the advance lands on the right glyph.
+
 ## Files
 
 - `src/marginalia_grammar.py` — palette, tokens, words, phrases, metrics.
-  Aligned with `public/site.css` design tokens; figures use the four
-  palette constants and never pick colours directly.
+  The four palette constants are `var(--fig-*)` references and
+  `FIGURE_TOKENS_LIGHT` / `FIGURE_TOKENS_DARK` hold their values;
+  figures never pick colours directly. `env` draws an environment
+  frame; `ARROW_MIN` is the shortest arrow allowed.
 - `docs/quality-registries.toml` — source of truth for attachments,
   captions, journeys, and curated editorial scores.
 - `src/editorial_registry.py` — loader for the registry (or its generated
@@ -267,6 +289,7 @@ explicitly. Re-introducing either is a defect.
 - **No contributor surface.** Contributors do not author figures or
   preview placement.
 - **No chromatic decoration.** Figures use only the locked palette
-  (`--text`, `--muted`, `--accent`, `--accent-soft`-equivalent neutral).
-  Emphasis is scarce: at most one accent mark per figure, used only for
-  the single element the prose names.
+  (`--fig-ink`, `--fig-ink-soft`, `--fig-accent`, `--fig-soft`, defined
+  in `public/site.css` for both colour schemes). Emphasis is scarce: at
+  most one accent mark per figure, used only for the single element the
+  prose names, and none when the prose names none.
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diff --git a/public/og/literals.jpg b/public/og/literals.jpg
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diff --git a/public/og/logging.jpg b/public/og/logging.jpg
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diff --git a/public/og/loop-else.jpg b/public/og/loop-else.jpg
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diff --git a/public/og/manifest.json b/public/og/manifest.json
index 938564e..678dc17 100644
--- a/public/og/manifest.json
+++ b/public/og/manifest.json
@@ -1,125 +1,125 @@
 {
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     <h1>Journey-figures gestalt</h1>
     <p class="meta">Every journey section's figure on one page so the set can be reasoned about as a whole. Score against <a class="text-link" href="https://github.com/adewale/pythonbyexample/blob/main/docs/journey-visualisation-rubric.md">the rubric</a>; redesign anything below the 8.5 gate before shipping to /journeys/&lt;slug&gt;.</p>
   </section>
-  <section class="journey-block"><h2>Runtime</h2><p class="meta">This journey builds the smallest coherent model of Python at runtime: programs run statements, names refer to objects, objects have types, and operations ask those objects to do work.</p><div class="section-grid"><figure><h3>Start with executable evidence.</h3><svg viewBox="-14 -14 334 124" width="534" height="198" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="10" width="104" height="76" fill="none" stroke="#521000" stroke-width="1.0"/><text x="6" y="7" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">PAGE</text><rect x="14" y="26" width="74" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="51.0" y="41.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">source</text><rect x="14" y="56" width="74" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="51.0" y="71.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">output</text><line x1="104" y1="48" x2="135.0" y2="48.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="142,48 135.0,50.8 135.0,45.2" fill="#FF4801"/><circle cx="160" cy="48" r="16" fill="none" stroke="#521000" stroke-width="1.0"/><text x="160" y="52" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="9" fill="#521000" text-anchor="middle">run</text><line x1="176" y1="48" x2="207.0" y2="48.0" stroke="#521000" stroke-width="1.0"/><polygon points="214,48 207.0,50.8 207.0,45.2" fill="#521000"/><rect x="216" y="34" width="88" height="28" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="260.0" y="52.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">evidence</text></svg><figcaption>Examples are evidence loops: source, a run step, and visible output stay together.</figcaption></figure><figure><h3>Separate value, identity, and absence.</h3><svg viewBox="-14 -14 242 132" width="387" height="211" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="36" width="70" height="28" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="35.0" y="54.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">object</text><line x1="70" y1="50" x2="106.43197795977251" y2="22.242302506839994" stroke="#521000" stroke-width="1.0"/><polygon points="112,18 108.1288989625085,24.46951132293099 104.73505695703652,20.015093690748998" fill="#521000"/><rect x="114" y="6" width="86" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="157.0" y="21.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">== value</text><line x1="70" y1="50" x2="105.0" y2="50.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="112,50 105.0,52.8 105.0,47.2" fill="#FF4801"/><rect x="114" y="38" width="98" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="163.0" y="53.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">is identity</text><line x1="70" y1="50" x2="106.43197795977251" y2="77.75769749316001" stroke="#521000" stroke-width="1.0"/><polygon points="112,82 104.73505695703652,79.984906309251 108.1288989625085,75.53048867706902" fill="#521000"/><rect x="114" y="70" width="86" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="157.0" y="85.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">None</text></svg><figcaption>Runtime objects answer separate questions: equal value, same identity, or the singleton that marks absence.</figcaption></figure><figure><h3>Read expressions as object operations.</h3><svg viewBox="-14 -14 372 124" width="595" height="198" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="34" width="64" height="28" fill="none" stroke="#521000" stroke-width="1.0"/><text x="32.0" y="52.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">syntax</text><line x1="64" y1="48" x2="95.0" y2="48.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="102,48 95.0,50.8 95.0,45.2" fill="#FF4801"/><rect x="104" y="12" width="128" height="72" fill="none" stroke="#521000" stroke-width="1.0"/><text x="110" y="9" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">DATA MODEL</text><rect x="116" y="24" width="104" height="16" 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y="52.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">result</text></svg><figcaption>Expression syntax enters the data model; object methods produce the result.</figcaption></figure></div></section><section class="journey-block"><h2>Control Flow</h2><p class="meta">This journey follows how a Python program chooses which path runs, names facts at decision points, and exits early when the remaining work no longer applies.</p><div class="section-grid"><figure><h3>Choose between paths.</h3><svg viewBox="-14 -14 272 132" width="435" height="211" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="38" width="58" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="29.0" y="54.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">facts</text><line x1="58" y1="50" x2="85.0" y2="50.0" stroke="#521000" 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marker.</figcaption></figure><figure><h3>See the protocol behind `for`.</h3><svg viewBox="-14 -14 334 160" width="534" height="256" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="8" width="54" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="27.0" y="23.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">for</text><line x1="27" y1="30" x2="27" y2="52" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><rect x="0" y="56" width="70" height="28" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="4" y="51" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">ITERABLE</text><text x="35.0" y="74.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">xs</text><line x1="72" y1="70" 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result visible.</p><div class="section-grid"><figure><h3>Pick the container that matches the question.</h3><svg viewBox="-14 -14 308 116" width="493" height="186" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="26" width="64" height="28" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="4" y="21" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">LIST</text><text x="32.0" y="44.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">[a,b]</text><text x="32" y="70" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">ordered</text><rect x="70" y="26" width="64" height="28" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="74" y="21" font-family="-apple-system, 'Source Sans Pro', 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A second name binds to the same function object.</figcaption></figure><figure><h3>Bundle behavior with state.</h3><svg viewBox="-14 -14 180 136" width="288" height="218" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="8" width="150" height="92" fill="none" stroke="#521000" stroke-width="1.0"/><text x="6" y="5" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">CLASS BOX</text><text x="12" y="26" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">STATE</text><rect x="12" y="32" width="126" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="75.0" y="47.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">x · y</text><text x="12" y="64" font-family="-apple-system, 'Source Sans Pro', 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report before execution.</figcaption></figure><figure><h3>Describe realistic data shapes.</h3><svg viewBox="-14 -14 318 136" width="509" height="218" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="44" width="62" height="24" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="31.0" y="60.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">data</text><line x1="62" y1="56" x2="102.5455058478131" y2="23.387310513715548" stroke="#521000" stroke-width="1.0"/><polygon points="108,19 104.30043005329932,25.569108174590305 100.79058164232688,21.20551285284079" fill="#521000"/><rect x="110" y="8" width="78" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="149.0" y="23.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">fields</text><rect x="198" y="8" width="90" height="22" 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+  <section class="journey-block"><h2>Runtime</h2><p class="meta">This journey builds the smallest coherent model of Python at runtime: programs run statements, names refer to objects, objects have types, and operations ask those objects to do work.</p><div class="section-grid"><figure><h3>Start with executable evidence.</h3><svg viewBox="-14 -14 334 124" width="534" height="198" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="10" width="104" height="76" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="6" y="7" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">PAGE</text><rect x="14" y="26" width="74" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="51.0" y="41.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="36" 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shape, transforming it directly, and making the result visible.</p><div class="section-grid"><figure><h3>Pick the container that matches the question.</h3><svg viewBox="-14 -14 308 116" width="493" height="186" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="26" width="64" height="28" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="4" y="21" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">LIST</text><text x="32.0" y="44.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="30" lengthAdjust="spacing">[a,b]</text><text x="32" y="70" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">ordered</text><rect x="70" y="26" width="64" height="28" fill="var(--fig-soft)" 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A second name binds to the same function object.</figcaption></figure><figure><h3>Bundle behavior with state.</h3><svg viewBox="-14 -14 180 136" width="288" height="218" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="8" width="150" height="92" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="6" y="5" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">CLASS BOX</text><text x="12" y="26" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">STATE</text><rect x="12" y="32" width="126" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="75.0" y="47.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="30" lengthAdjust="spacing">x · y</text><text x="12" y="64" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">METHODS</text><rect x="12" y="70" width="126" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="75.0" y="85.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="54" lengthAdjust="spacing">move(...)</text></svg><figcaption>Classes group fields and methods so data and behavior move together behind one interface.</figcaption></figure></div></section><section class="journey-block"><h2>Types</h2><p class="meta">This journey maps Python&#x27;s runtime object model to optional static annotations so learners know what types can and cannot promise.</p><div class="section-grid"><figure><h3>Keep runtime and static analysis separate.</h3><svg viewBox="-14 -14 252 154" width="403" height="246" aria-hidden="true" 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lengthAdjust="spacing">typed result</text></svg><figcaption>Reusable APIs carry caller contracts through the library boundary with generics, parameters, and overloads.</figcaption></figure></div></section><section class="journey-block"><h2>Reliability</h2><p class="meta">This journey follows the boundaries where programs fail, clean up, split into modules, communicate with the outside world, and run concurrent work.</p><div class="section-grid"><figure><h3>Make failure explicit.</h3><svg viewBox="-14 -14 298 156" width="477" height="250" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="52" width="70" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="35.0" y="68.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">problem</text><line x1="70" y1="64" x2="107.44446038580821" y2="20.314796216557077" 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lengthAdjust="spacing">soft</text><rect x="194" y="100" width="72" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="230.0" y="115.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">warn</text></svg><figcaption>Different failure shapes need explicit signals: assertions, recovery, chained causes, or warnings.</figcaption></figure><figure><h3>Control resource and module boundaries.</h3><svg viewBox="-14 -14 314 138" width="502" height="221" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="44" width="58" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="29.0" y="60.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">code</text><line x1="58" y1="56" x2="79.0" 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height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="143.0" y="96.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="18" lengthAdjust="spacing">env</text><line x1="184" y1="92" x2="205.0" y2="92.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="212,92 205.0,94.8 205.0,89.2" fill="var(--fig-ink)"/><rect x="214" y="82" width="58" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="243.0" y="96.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">runtime</text></svg><figcaption>Reliable programs name their boundaries: resources clean up, modules import, environments constrain runtime.</figcaption></figure><figure><h3>Handle operations that outlive one expression.</h3><svg viewBox="-14 -14 382 132" width="611" height="211" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="44" width="58" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="29.0" y="60.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">call</text><line x1="58" y1="56" x2="89.0" y2="56.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="96,56 89.0,58.8 89.0,53.2" fill="var(--fig-accent)"/><rect x="98" y="18" width="128" height="76" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="104" y="15" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">OPERATION</text><rect x="110" y="32" width="46" height="18" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="133.0" y="45.0" font-family="ui-monospace, SFMono-Regular, 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textLength="18" lengthAdjust="spacing">log</text><line x1="226" y1="56" x2="259.0" y2="56.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="266,56 259.0,58.8 259.0,53.2" fill="var(--fig-ink)"/><rect x="268" y="44" width="82" height="24" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="309.0" y="60.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="48" lengthAdjust="spacing">evidence</text></svg><figcaption>Async, threaded, test, and logging work cross an operation boundary before evidence comes back.</figcaption></figure></div></section>
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diff --git a/public/prototyping/layout-banner-pair.html b/public/prototyping/layout-banner-pair.html
index db4b647..4efcb2b 100644
--- a/public/prototyping/layout-banner-pair.html
+++ b/public/prototyping/layout-banner-pair.html
@@ -61,7 +61,7 @@ <h1>Mutability</h1>
 second.append(&quot;workers&quot;)
 print(first)
 print(second)</code></pre></div><div class="cell-output"><p class="cell-label">Output</p><pre><code>[&#x27;python&#x27;, &#x27;workers&#x27;]
-[&#x27;python&#x27;, &#x27;workers&#x27;]</code></pre></div></div></section><div class="cell-banner cell-banner--2"><figure><svg viewBox="-14 -14 248 203" width="397" height="325" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="12" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">BEFORE</text><rect x="0" y="18" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="34.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">first</text><rect x="0" y="48" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="64.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">second</text><line x1="60" y1="30" x2="80.03839178306819" y2="42.331318020349656" stroke="#521000" stroke-width="1.0"/><polygon points="86,46 78.57091899120806,44.71596130712238 81.50586457492832,39.946674733576934" fill="#521000"/><line x1="60" y1="60" x2="79.83670230054477" y2="49.31869876124512" stroke="#521000" stroke-width="1.0"/><polygon points="86,46 81.16418180504282,51.784017841027215 78.50922279604673,46.85337968146303" fill="#521000"/><rect x="88" y="32" width="88" height="28" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="132.0" y="50.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">["python"]</text><text x="0" y="102" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">AFTER APPEND</text><rect x="0" y="108" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="124.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">first</text><rect x="0" y="138" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="154.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">second</text><line x1="60" y1="120" x2="80.03839178306819" y2="132.33131802034967" stroke="#521000" stroke-width="1.0"/><polygon points="86,136 78.57091899120806,134.7159613071224 81.50586457492832,129.94667473357694" fill="#521000"/><line x1="60" y1="150" x2="79.83670230054477" y2="139.31869876124512" stroke="#521000" stroke-width="1.0"/><polygon points="86,136 81.16418180504282,141.7840178410272 78.50922279604673,136.85337968146303" fill="#521000"/><rect x="88" y="122" width="130" height="28" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="153.0" y="140.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">["python","workers"]</text></svg><figcaption>Two names share one mutable list — appending through one name changes the object visible through both.</figcaption></figure><figure><svg viewBox="-14 -14 248 213" width="397" height="341" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="12" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">TUPLE — FROZEN</text><rect x="0" y="18" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="34.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">first</text><rect x="0" y="48" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="64.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">second</text><line x1="60" y1="30" x2="80.03839178306819" y2="42.331318020349656" stroke="#521000" stroke-width="1.0"/><polygon points="86,46 78.57091899120806,44.71596130712238 81.50586457492832,39.946674733576934" fill="#521000"/><line x1="60" y1="60" x2="79.83670230054477" y2="49.31869876124512" stroke="#521000" stroke-width="1.0"/><polygon points="86,46 81.16418180504282,51.784017841027215 78.50922279604673,46.85337968146303" fill="#521000"/><rect x="88" y="32" width="110" height="28" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="143.0" y="50.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">("python",)</text><text x="0" y="102" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">NO .APPEND</text><rect x="0" y="108" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="124.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">first</text><rect x="0" y="138" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="154.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">second</text><line x1="60" y1="120" x2="80.03839178306819" y2="132.33131802034967" stroke="#521000" stroke-width="1.0"/><polygon points="86,136 78.57091899120806,134.7159613071224 81.50586457492832,129.94667473357694" fill="#521000"/><line x1="60" y1="150" x2="79.83670230054477" y2="139.31869876124512" stroke="#521000" stroke-width="1.0"/><polygon points="86,136 81.16418180504282,141.7840178410272 78.50922279604673,136.85337968146303" fill="#521000"/><rect x="88" y="122" width="110" height="28" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="143.0" y="140.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">("python",)</text><text x="150" y="170" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">tuples raise AttributeError</text></svg><figcaption>By contrast, a tuple is frozen — its contents cannot change in place, so aliasing carries no mutation hazard.</figcaption></figure></div><section class="lesson-step lp-cell"><div class="lp-prose"><p>Immutable objects do not change in place. String methods such as <code class="syntax-inline">upper()</code> return a new string, leaving the original string unchanged.</p></div><div class="cell-code-stack"><div class="cell-source"><p class="cell-label">Source</p><pre><code class="language-python">text = &quot;python&quot;
+[&#x27;python&#x27;, &#x27;workers&#x27;]</code></pre></div></div></section><div class="cell-banner cell-banner--2"><figure><svg viewBox="-14 -14 248 203" width="397" height="325" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="12" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">BEFORE</text><rect x="0" y="18" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="34.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">first</text><rect x="0" y="48" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="64.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">second</text><line x1="60" y1="30" x2="80.03839178306819" y2="42.331318020349656" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,46 78.57091899120806,44.71596130712238 81.50586457492832,39.946674733576934" fill="var(--fig-ink)"/><line x1="60" y1="60" x2="79.83670230054477" y2="49.31869876124512" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,46 81.16418180504282,51.784017841027215 78.50922279604673,46.85337968146303" fill="var(--fig-ink)"/><rect x="88" y="32" width="88" height="28" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="132.0" y="50.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="60" lengthAdjust="spacing">["python"]</text><text x="0" y="102" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">AFTER APPEND</text><rect x="0" y="108" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="124.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">first</text><rect x="0" y="138" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="154.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">second</text><line x1="60" y1="120" x2="80.03839178306819" y2="132.33131802034967" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,136 78.57091899120806,134.7159613071224 81.50586457492832,129.94667473357694" fill="var(--fig-ink)"/><line x1="60" y1="150" x2="79.83670230054477" y2="139.31869876124512" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,136 81.16418180504282,141.7840178410272 78.50922279604673,136.85337968146303" fill="var(--fig-ink)"/><rect x="88" y="122" width="130" height="28" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="153.0" y="140.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="120" lengthAdjust="spacing">["python","workers"]</text></svg><figcaption>Two names share one mutable list — appending through one name changes the object visible through both.</figcaption></figure><figure><svg viewBox="-14 -14 248 213" width="397" height="341" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="12" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">TUPLE — FROZEN</text><rect x="0" y="18" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="34.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">first</text><rect x="0" y="48" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="64.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">second</text><line x1="60" y1="30" x2="80.03839178306819" y2="42.331318020349656" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,46 78.57091899120806,44.71596130712238 81.50586457492832,39.946674733576934" fill="var(--fig-ink)"/><line x1="60" y1="60" x2="79.83670230054477" y2="49.31869876124512" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,46 81.16418180504282,51.784017841027215 78.50922279604673,46.85337968146303" fill="var(--fig-ink)"/><rect x="88" y="32" width="110" height="28" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="143.0" y="50.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="66" lengthAdjust="spacing">("python",)</text><text x="0" y="102" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">NO .APPEND</text><rect x="0" y="108" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="124.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">first</text><rect x="0" y="138" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="154.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">second</text><line x1="60" y1="120" x2="80.03839178306819" y2="132.33131802034967" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,136 78.57091899120806,134.7159613071224 81.50586457492832,129.94667473357694" fill="var(--fig-ink)"/><line x1="60" y1="150" x2="79.83670230054477" y2="139.31869876124512" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,136 81.16418180504282,141.7840178410272 78.50922279604673,136.85337968146303" fill="var(--fig-ink)"/><rect x="88" y="122" width="110" height="28" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="143.0" y="140.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="66" lengthAdjust="spacing">("python",)</text><text x="150" y="170" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">tuples raise AttributeError</text></svg><figcaption>By contrast, a tuple is frozen — its contents cannot change in place, so aliasing carries no mutation hazard.</figcaption></figure></div><section class="lesson-step lp-cell"><div class="lp-prose"><p>Immutable objects do not change in place. String methods such as <code class="syntax-inline">upper()</code> return a new string, leaving the original string unchanged.</p></div><div class="cell-code-stack"><div class="cell-source"><p class="cell-label">Source</p><pre><code class="language-python">text = &quot;python&quot;
 upper_text = text.upper()
 print(text)
 print(upper_text)</code></pre></div><div class="cell-output"><p class="cell-label">Output</p><pre><code>python
diff --git a/public/prototyping/layout-banner-single.html b/public/prototyping/layout-banner-single.html
index f1f1815..991e3d0 100644
--- a/public/prototyping/layout-banner-single.html
+++ b/public/prototyping/layout-banner-single.html
@@ -61,7 +61,7 @@ <h1>Mutability</h1>
 second.append(&quot;workers&quot;)
 print(first)
 print(second)</code></pre></div><div class="cell-output"><p class="cell-label">Output</p><pre><code>[&#x27;python&#x27;, &#x27;workers&#x27;]
-[&#x27;python&#x27;, &#x27;workers&#x27;]</code></pre></div></div></section><div class="cell-banner cell-banner--1"><figure><svg viewBox="-14 -14 248 203" width="397" height="325" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="12" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">BEFORE</text><rect x="0" y="18" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="34.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">first</text><rect x="0" y="48" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="64.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">second</text><line x1="60" y1="30" x2="80.03839178306819" y2="42.331318020349656" stroke="#521000" stroke-width="1.0"/><polygon points="86,46 78.57091899120806,44.71596130712238 81.50586457492832,39.946674733576934" fill="#521000"/><line x1="60" y1="60" x2="79.83670230054477" y2="49.31869876124512" stroke="#521000" stroke-width="1.0"/><polygon points="86,46 81.16418180504282,51.784017841027215 78.50922279604673,46.85337968146303" fill="#521000"/><rect x="88" y="32" width="88" height="28" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="132.0" y="50.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">["python"]</text><text x="0" y="102" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">AFTER APPEND</text><rect x="0" y="108" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="124.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">first</text><rect x="0" y="138" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="154.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">second</text><line x1="60" y1="120" x2="80.03839178306819" y2="132.33131802034967" stroke="#521000" stroke-width="1.0"/><polygon points="86,136 78.57091899120806,134.7159613071224 81.50586457492832,129.94667473357694" fill="#521000"/><line x1="60" y1="150" x2="79.83670230054477" y2="139.31869876124512" stroke="#521000" stroke-width="1.0"/><polygon points="86,136 81.16418180504282,141.7840178410272 78.50922279604673,136.85337968146303" fill="#521000"/><rect x="88" y="122" width="130" height="28" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="153.0" y="140.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">["python","workers"]</text></svg><figcaption>Two names share one mutable list — appending through one name changes the object visible through both.</figcaption></figure></div><section class="lesson-step lp-cell"><div class="lp-prose"><p>Immutable objects do not change in place. String methods such as <code class="syntax-inline">upper()</code> return a new string, leaving the original string unchanged.</p></div><div class="cell-code-stack"><div class="cell-source"><p class="cell-label">Source</p><pre><code class="language-python">text = &quot;python&quot;
+[&#x27;python&#x27;, &#x27;workers&#x27;]</code></pre></div></div></section><div class="cell-banner cell-banner--1"><figure><svg viewBox="-14 -14 248 203" width="397" height="325" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="12" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">BEFORE</text><rect x="0" y="18" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="34.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">first</text><rect x="0" y="48" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="64.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">second</text><line x1="60" y1="30" x2="80.03839178306819" y2="42.331318020349656" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,46 78.57091899120806,44.71596130712238 81.50586457492832,39.946674733576934" fill="var(--fig-ink)"/><line x1="60" y1="60" x2="79.83670230054477" y2="49.31869876124512" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,46 81.16418180504282,51.784017841027215 78.50922279604673,46.85337968146303" fill="var(--fig-ink)"/><rect x="88" y="32" width="88" height="28" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="132.0" y="50.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="60" lengthAdjust="spacing">["python"]</text><text x="0" y="102" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">AFTER APPEND</text><rect x="0" y="108" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="124.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">first</text><rect x="0" y="138" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="154.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">second</text><line x1="60" y1="120" x2="80.03839178306819" y2="132.33131802034967" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,136 78.57091899120806,134.7159613071224 81.50586457492832,129.94667473357694" fill="var(--fig-ink)"/><line x1="60" y1="150" x2="79.83670230054477" y2="139.31869876124512" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,136 81.16418180504282,141.7840178410272 78.50922279604673,136.85337968146303" fill="var(--fig-ink)"/><rect x="88" y="122" width="130" height="28" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="153.0" y="140.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="120" lengthAdjust="spacing">["python","workers"]</text></svg><figcaption>Two names share one mutable list — appending through one name changes the object visible through both.</figcaption></figure></div><section class="lesson-step lp-cell"><div class="lp-prose"><p>Immutable objects do not change in place. String methods such as <code class="syntax-inline">upper()</code> return a new string, leaving the original string unchanged.</p></div><div class="cell-code-stack"><div class="cell-source"><p class="cell-label">Source</p><pre><code class="language-python">text = &quot;python&quot;
 upper_text = text.upper()
 print(text)
 print(upper_text)</code></pre></div><div class="cell-output"><p class="cell-label">Output</p><pre><code>python
diff --git a/public/prototyping/layout-banner-trio.html b/public/prototyping/layout-banner-trio.html
index a0addd0..f232969 100644
--- a/public/prototyping/layout-banner-trio.html
+++ b/public/prototyping/layout-banner-trio.html
@@ -56,7 +56,7 @@
     <h1>Mutability</h1>
     <p class="meta">Some objects change in place, while others return new values.</p>
   </section>
-  <section class="literate-program" aria-label="Annotated code walkthrough"><div class="cell-banner cell-banner--1"><figure><svg viewBox="-14 -14 248 203" width="397" height="325" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="12" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">BEFORE</text><rect x="0" y="18" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="34.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">first</text><rect x="0" y="48" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="64.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">second</text><line x1="60" y1="30" x2="80.03839178306819" y2="42.331318020349656" stroke="#521000" stroke-width="1.0"/><polygon points="86,46 78.57091899120806,44.71596130712238 81.50586457492832,39.946674733576934" fill="#521000"/><line x1="60" y1="60" x2="79.83670230054477" y2="49.31869876124512" stroke="#521000" stroke-width="1.0"/><polygon points="86,46 81.16418180504282,51.784017841027215 78.50922279604673,46.85337968146303" fill="#521000"/><rect x="88" y="32" width="88" height="28" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="132.0" y="50.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">["python"]</text><text x="0" y="102" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">AFTER APPEND</text><rect x="0" y="108" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="124.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">first</text><rect x="0" y="138" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="154.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">second</text><line x1="60" y1="120" x2="80.03839178306819" y2="132.33131802034967" stroke="#521000" stroke-width="1.0"/><polygon points="86,136 78.57091899120806,134.7159613071224 81.50586457492832,129.94667473357694" fill="#521000"/><line x1="60" y1="150" x2="79.83670230054477" y2="139.31869876124512" stroke="#521000" stroke-width="1.0"/><polygon points="86,136 81.16418180504282,141.7840178410272 78.50922279604673,136.85337968146303" fill="#521000"/><rect x="88" y="122" width="130" height="28" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="153.0" y="140.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">["python","workers"]</text></svg><figcaption>Two names share one mutable list — appending through one name changes the object visible through both.</figcaption></figure></div><section class="lesson-step lp-cell"><div class="lp-prose"><p>Mutable objects can change in place. <code class="syntax-inline">first</code> and <code class="syntax-inline">second</code> point to the same list, so appending through one name changes the object seen through both names.</p></div><div class="cell-code-stack"><div class="cell-source"><p class="cell-label">Source</p><pre><code class="language-python">first = [&quot;python&quot;]
+  <section class="literate-program" aria-label="Annotated code walkthrough"><div class="cell-banner cell-banner--1"><figure><svg viewBox="-14 -14 248 203" width="397" height="325" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="12" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">BEFORE</text><rect x="0" y="18" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="34.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">first</text><rect x="0" y="48" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="64.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">second</text><line x1="60" y1="30" x2="80.03839178306819" y2="42.331318020349656" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,46 78.57091899120806,44.71596130712238 81.50586457492832,39.946674733576934" fill="var(--fig-ink)"/><line x1="60" y1="60" x2="79.83670230054477" y2="49.31869876124512" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,46 81.16418180504282,51.784017841027215 78.50922279604673,46.85337968146303" fill="var(--fig-ink)"/><rect x="88" y="32" width="88" height="28" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="132.0" y="50.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="60" lengthAdjust="spacing">["python"]</text><text x="0" y="102" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">AFTER APPEND</text><rect x="0" y="108" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="124.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">first</text><rect x="0" y="138" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="154.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">second</text><line x1="60" y1="120" x2="80.03839178306819" y2="132.33131802034967" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,136 78.57091899120806,134.7159613071224 81.50586457492832,129.94667473357694" fill="var(--fig-ink)"/><line x1="60" y1="150" x2="79.83670230054477" y2="139.31869876124512" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,136 81.16418180504282,141.7840178410272 78.50922279604673,136.85337968146303" fill="var(--fig-ink)"/><rect x="88" y="122" width="130" height="28" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="153.0" y="140.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="120" lengthAdjust="spacing">["python","workers"]</text></svg><figcaption>Two names share one mutable list — appending through one name changes the object visible through both.</figcaption></figure></div><section class="lesson-step lp-cell"><div class="lp-prose"><p>Mutable objects can change in place. <code class="syntax-inline">first</code> and <code class="syntax-inline">second</code> point to the same list, so appending through one name changes the object seen through both names.</p></div><div class="cell-code-stack"><div class="cell-source"><p class="cell-label">Source</p><pre><code class="language-python">first = [&quot;python&quot;]
 second = first
 second.append(&quot;workers&quot;)
 print(first)
@@ -65,11 +65,11 @@ <h1>Mutability</h1>
 upper_text = text.upper()
 print(text)
 print(upper_text)</code></pre></div><div class="cell-output"><p class="cell-label">Output</p><pre><code>python
-PYTHON</code></pre></div></div></section><div class="cell-banner cell-banner--2"><figure><svg viewBox="-14 -14 248 203" width="397" height="325" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="12" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">BEFORE</text><rect x="0" y="18" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="34.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">first</text><rect x="0" y="48" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="64.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">second</text><line x1="60" y1="30" x2="80.03839178306819" y2="42.331318020349656" stroke="#521000" stroke-width="1.0"/><polygon points="86,46 78.57091899120806,44.71596130712238 81.50586457492832,39.946674733576934" fill="#521000"/><line x1="60" y1="60" x2="79.83670230054477" y2="49.31869876124512" stroke="#521000" stroke-width="1.0"/><polygon points="86,46 81.16418180504282,51.784017841027215 78.50922279604673,46.85337968146303" fill="#521000"/><rect x="88" y="32" width="88" height="28" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="132.0" y="50.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">["python"]</text><text x="0" y="102" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">AFTER APPEND</text><rect x="0" y="108" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="124.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">first</text><rect x="0" y="138" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="154.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">second</text><line x1="60" y1="120" x2="80.03839178306819" y2="132.33131802034967" stroke="#521000" stroke-width="1.0"/><polygon points="86,136 78.57091899120806,134.7159613071224 81.50586457492832,129.94667473357694" fill="#521000"/><line x1="60" y1="150" x2="79.83670230054477" y2="139.31869876124512" stroke="#521000" stroke-width="1.0"/><polygon points="86,136 81.16418180504282,141.7840178410272 78.50922279604673,136.85337968146303" fill="#521000"/><rect x="88" y="122" width="130" height="28" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="153.0" y="140.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">["python","workers"]</text></svg><figcaption>Mutable: change visible through any alias.</figcaption></figure><figure><svg viewBox="-14 -14 248 213" width="397" height="341" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="12" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">TUPLE — FROZEN</text><rect x="0" y="18" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="34.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">first</text><rect x="0" y="48" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="64.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">second</text><line x1="60" y1="30" x2="80.03839178306819" y2="42.331318020349656" stroke="#521000" stroke-width="1.0"/><polygon points="86,46 78.57091899120806,44.71596130712238 81.50586457492832,39.946674733576934" fill="#521000"/><line x1="60" y1="60" x2="79.83670230054477" y2="49.31869876124512" stroke="#521000" stroke-width="1.0"/><polygon points="86,46 81.16418180504282,51.784017841027215 78.50922279604673,46.85337968146303" fill="#521000"/><rect x="88" y="32" width="110" height="28" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="143.0" y="50.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">("python",)</text><text x="0" y="102" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">NO .APPEND</text><rect x="0" y="108" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="124.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">first</text><rect x="0" y="138" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="154.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">second</text><line x1="60" y1="120" x2="80.03839178306819" y2="132.33131802034967" stroke="#521000" stroke-width="1.0"/><polygon points="86,136 78.57091899120806,134.7159613071224 81.50586457492832,129.94667473357694" fill="#521000"/><line x1="60" y1="150" x2="79.83670230054477" y2="139.31869876124512" stroke="#521000" stroke-width="1.0"/><polygon points="86,136 81.16418180504282,141.7840178410272 78.50922279604673,136.85337968146303" fill="#521000"/><rect x="88" y="122" width="110" height="28" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="143.0" y="140.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">("python",)</text><text x="150" y="170" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">tuples raise AttributeError</text></svg><figcaption>Immutable: aliases share a frozen value.</figcaption></figure></div><section class="lesson-step lp-cell"><div class="lp-prose"><p>Some APIs make the boundary explicit. <code class="syntax-inline">sorted()</code> returns a new list, while methods such as <code class="syntax-inline">append()</code> and <code class="syntax-inline">list.sort()</code> mutate an existing list.</p></div><div class="cell-code-stack"><div class="cell-source"><p class="cell-label">Source</p><pre><code class="language-python">numbers = [3, 1, 2]
+PYTHON</code></pre></div></div></section><div class="cell-banner cell-banner--2"><figure><svg viewBox="-14 -14 248 203" width="397" height="325" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="12" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">BEFORE</text><rect x="0" y="18" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="34.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">first</text><rect x="0" y="48" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="64.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">second</text><line x1="60" y1="30" x2="80.03839178306819" y2="42.331318020349656" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,46 78.57091899120806,44.71596130712238 81.50586457492832,39.946674733576934" fill="var(--fig-ink)"/><line x1="60" y1="60" x2="79.83670230054477" y2="49.31869876124512" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,46 81.16418180504282,51.784017841027215 78.50922279604673,46.85337968146303" fill="var(--fig-ink)"/><rect x="88" y="32" width="88" height="28" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="132.0" y="50.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="60" lengthAdjust="spacing">["python"]</text><text x="0" y="102" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">AFTER APPEND</text><rect x="0" y="108" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="124.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">first</text><rect x="0" y="138" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="154.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">second</text><line x1="60" y1="120" x2="80.03839178306819" y2="132.33131802034967" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,136 78.57091899120806,134.7159613071224 81.50586457492832,129.94667473357694" fill="var(--fig-ink)"/><line x1="60" y1="150" x2="79.83670230054477" y2="139.31869876124512" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,136 81.16418180504282,141.7840178410272 78.50922279604673,136.85337968146303" fill="var(--fig-ink)"/><rect x="88" y="122" width="130" height="28" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="153.0" y="140.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="120" lengthAdjust="spacing">["python","workers"]</text></svg><figcaption>Mutable: change visible through any alias.</figcaption></figure><figure><svg viewBox="-14 -14 248 213" width="397" height="341" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="12" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">TUPLE — FROZEN</text><rect x="0" y="18" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="34.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">first</text><rect x="0" y="48" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="64.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">second</text><line x1="60" y1="30" x2="80.03839178306819" y2="42.331318020349656" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,46 78.57091899120806,44.71596130712238 81.50586457492832,39.946674733576934" fill="var(--fig-ink)"/><line x1="60" y1="60" x2="79.83670230054477" y2="49.31869876124512" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,46 81.16418180504282,51.784017841027215 78.50922279604673,46.85337968146303" fill="var(--fig-ink)"/><rect x="88" y="32" width="110" height="28" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="143.0" y="50.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="66" lengthAdjust="spacing">("python",)</text><text x="0" y="102" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">NO .APPEND</text><rect x="0" y="108" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="124.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">first</text><rect x="0" y="138" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="154.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">second</text><line x1="60" y1="120" x2="80.03839178306819" y2="132.33131802034967" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,136 78.57091899120806,134.7159613071224 81.50586457492832,129.94667473357694" fill="var(--fig-ink)"/><line x1="60" y1="150" x2="79.83670230054477" y2="139.31869876124512" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,136 81.16418180504282,141.7840178410272 78.50922279604673,136.85337968146303" fill="var(--fig-ink)"/><rect x="88" y="122" width="110" height="28" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="143.0" y="140.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="66" lengthAdjust="spacing">("python",)</text><text x="150" y="170" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">tuples raise AttributeError</text></svg><figcaption>Immutable: aliases share a frozen value.</figcaption></figure></div><section class="lesson-step lp-cell"><div class="lp-prose"><p>Some APIs make the boundary explicit. <code class="syntax-inline">sorted()</code> returns a new list, while methods such as <code class="syntax-inline">append()</code> and <code class="syntax-inline">list.sort()</code> mutate an existing list.</p></div><div class="cell-code-stack"><div class="cell-source"><p class="cell-label">Source</p><pre><code class="language-python">numbers = [3, 1, 2]
 ordered = sorted(numbers)
 print(ordered)
 print(numbers)</code></pre></div><div class="cell-output"><p class="cell-label">Output</p><pre><code>[1, 2, 3]
-[3, 1, 2]</code></pre></div></div></section><div class="cell-banner cell-banner--1"><figure><svg viewBox="-14 -14 248 213" width="397" height="341" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="12" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">TUPLE — FROZEN</text><rect x="0" y="18" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="34.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">first</text><rect x="0" y="48" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="64.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">second</text><line x1="60" y1="30" x2="80.03839178306819" y2="42.331318020349656" stroke="#521000" stroke-width="1.0"/><polygon points="86,46 78.57091899120806,44.71596130712238 81.50586457492832,39.946674733576934" fill="#521000"/><line x1="60" y1="60" x2="79.83670230054477" y2="49.31869876124512" stroke="#521000" stroke-width="1.0"/><polygon points="86,46 81.16418180504282,51.784017841027215 78.50922279604673,46.85337968146303" fill="#521000"/><rect x="88" y="32" width="110" height="28" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="143.0" y="50.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">("python",)</text><text x="0" y="102" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">NO .APPEND</text><rect x="0" y="108" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="124.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">first</text><rect x="0" y="138" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="154.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">second</text><line x1="60" y1="120" x2="80.03839178306819" y2="132.33131802034967" stroke="#521000" stroke-width="1.0"/><polygon points="86,136 78.57091899120806,134.7159613071224 81.50586457492832,129.94667473357694" fill="#521000"/><line x1="60" y1="150" x2="79.83670230054477" y2="139.31869876124512" stroke="#521000" stroke-width="1.0"/><polygon points="86,136 81.16418180504282,141.7840178410272 78.50922279604673,136.85337968146303" fill="#521000"/><rect x="88" y="122" width="110" height="28" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="143.0" y="140.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">("python",)</text><text x="150" y="170" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">tuples raise AttributeError</text></svg><figcaption>When in doubt, reach for the immutable shape.</figcaption></figure></div></section>
+[3, 1, 2]</code></pre></div></div></section><div class="cell-banner cell-banner--1"><figure><svg viewBox="-14 -14 248 213" width="397" height="341" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="12" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">TUPLE — FROZEN</text><rect x="0" y="18" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="34.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">first</text><rect x="0" y="48" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="64.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">second</text><line x1="60" y1="30" x2="80.03839178306819" y2="42.331318020349656" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,46 78.57091899120806,44.71596130712238 81.50586457492832,39.946674733576934" fill="var(--fig-ink)"/><line x1="60" y1="60" x2="79.83670230054477" y2="49.31869876124512" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,46 81.16418180504282,51.784017841027215 78.50922279604673,46.85337968146303" fill="var(--fig-ink)"/><rect x="88" y="32" width="110" height="28" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="143.0" y="50.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="66" lengthAdjust="spacing">("python",)</text><text x="0" y="102" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">NO .APPEND</text><rect x="0" y="108" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="124.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">first</text><rect x="0" y="138" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="154.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">second</text><line x1="60" y1="120" x2="80.03839178306819" y2="132.33131802034967" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,136 78.57091899120806,134.7159613071224 81.50586457492832,129.94667473357694" fill="var(--fig-ink)"/><line x1="60" y1="150" x2="79.83670230054477" y2="139.31869876124512" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,136 81.16418180504282,141.7840178410272 78.50922279604673,136.85337968146303" fill="var(--fig-ink)"/><rect x="88" y="122" width="110" height="28" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="143.0" y="140.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="66" lengthAdjust="spacing">("python",)</text><text x="150" y="170" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">tuples raise AttributeError</text></svg><figcaption>When in doubt, reach for the immutable shape.</figcaption></figure></div></section>
   <p class="eyebrow">Notes</p>
   <ul class="notes-list"><li>Lists and dictionaries are mutable; strings and tuples are immutable.</li><li>Aliasing is useful, but copy mutable containers when independent changes are needed.</li><li>Pay attention to whether an operation mutates in place or returns a new value.</li></ul>
   <section class="playground" aria-label="Editable runnable example">
diff --git a/public/prototyping/marginalia-gestalt.html b/public/prototyping/marginalia-gestalt.html
index 873544a..e8896e7 100644
--- a/public/prototyping/marginalia-gestalt.html
+++ b/public/prototyping/marginalia-gestalt.html
@@ -10,6 +10,7 @@
     --ink: #521000;
     --ink-soft: rgba(82, 16, 0, 0.7);
     --rule: #EBD5C1;
+    --fig-ink: #521000; --fig-ink-soft: rgba(82, 16, 0, 0.7); --fig-accent: #FF4801; --fig-soft: rgba(82, 16, 0, 0.05);
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@@ -67,805 +68,805 @@ <h2 class="section">Examples</h2>
 <div class="card">
   <p class="eyebrow">Basics · 01</p>
   <h3>Hello World</h3>
-  <svg viewBox="-14 -14 268 108" width="429" height="173" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="28" width="92" height="28" fill="none" stroke="#521000" stroke-width="1.0"/><text x="46.0" y="46.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">print("…")</text><line x1="92" y1="42" x2="117.0" y2="42.0" stroke="#521000" stroke-width="1.0"/><polygon points="124,42 117.0,44.8 117.0,39.2" fill="#521000"/><text x="108" y="36" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">stdout</text><rect x="126" y="28" width="110" height="28" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="181.0" y="46.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">hello world</text></svg>
+  <svg viewBox="-14 -14 268 108" width="429" height="173" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="28" width="92" height="28" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="46.0" y="46.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="60" lengthAdjust="spacing">print("…")</text><line x1="92" y1="42" x2="117.0" y2="42.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="124,42 117.0,44.8 117.0,39.2" fill="var(--fig-ink)"/><text x="108" y="36" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">stdout</text><rect x="126" y="28" width="110" height="28" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="181.0" y="46.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="66" lengthAdjust="spacing">hello world</text></svg>
   <p class="caption">Every Python program starts as source and produces text on standard output. The smallest mental model.</p>
   <p class="score score-high">9.0 · program → output, smallest mechanism</p>
 </div>
 <div class="card">
   <p class="eyebrow">Basics · 02</p>
   <h3>Values</h3>
-  <svg viewBox="-14 -14 188 144" width="301" height="230" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="160" height="26" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="4" y="10" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">INT</text><text x="80.0" y="17.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">42</text><rect x="0" y="30" width="160" height="26" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="4" y="40" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">STR</text><text x="80.0" y="47.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">"hi"</text><rect x="0" y="60" width="160" height="26" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="4" y="70" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">LIST</text><text x="80.0" y="77.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">[1,2,3]</text><rect x="0" y="90" width="160" height="26" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="4" y="100" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">DICT</text><text x="80.0" y="107.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">{k:v}</text></svg>
-  <p class="caption">Every literal is an object with a type; the type carries the behaviour, not the variable name.</p>
-  <p class="score score-high">9.0 · every literal is a typed object</p>
+  <svg viewBox="-14 -14 308 108" width="493" height="173" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="34.0" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="50.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">text</text><rect x="88" y="30" width="80" height="32" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="92" y="25" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">STR</text><text x="128.0" y="50.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="48" lengthAdjust="spacing">"python"</text><line x1="62" y1="46.0" x2="79.0" y2="46.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,46.0 79.0,48.8 79.0,43.2" fill="var(--fig-ink)"/><line x1="168" y1="46" x2="204" y2="46" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><text x="186" y="40" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">type()</text><rect x="206" y="22" width="72" height="44" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="212" y="19" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">CLASS STR</text><text x="242" y="48" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">upper()</text></svg>
+  <p class="caption">text names a str object, and type(text) is str: the type carries upper() and the rest of the behaviour, not the name.</p>
+  <p class="score score-high">9.0 · text → str binding plus the type() hop to where upper() lives; earns-place 0.75 since the cell prints type(text), one-move 0.75; 1.5/0.75/0.75/1/1 · 1/1/1 · 1/0.5</p>
 </div>
 <div class="card">
   <p class="eyebrow">Basics · 03</p>
   <h3>Literals</h3>
-  <svg viewBox="-14 -14 280 160" width="448" height="256" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="50" height="20" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="25.0" y="14.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">int</text><rect x="52" y="0" width="200" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="152.0" y="14.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">42  ·  0x2a  ·  0b101</text><rect x="0" y="22" width="50" height="20" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="25.0" y="36.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">float</text><rect x="52" y="22" width="200" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="152.0" y="36.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">3.14  ·  1e-3</text><rect x="0" y="44" width="50" height="20" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="25.0" y="58.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">str</text><rect x="52" y="44" width="200" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="152.0" y="58.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">"hi"  ·  'hi'</text><rect x="0" y="66" width="50" height="20" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="25.0" y="80.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">list</text><rect x="52" y="66" width="200" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="152.0" y="80.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">[1, 2, 3]</text><rect x="0" y="88" width="50" height="20" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="25.0" y="102.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">dict</text><rect x="52" y="88" width="200" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="152.0" y="102.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">{k: v}</text><rect x="0" y="110" width="50" height="20" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="25.0" y="124.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">set</text><rect x="52" y="110" width="200" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="152.0" y="124.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">{1, 2, 3}</text></svg>
+  <svg viewBox="-14 -14 280 160" width="448" height="256" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="50" height="20" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="25.0" y="14.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="18" lengthAdjust="spacing">int</text><rect x="52" y="0" width="200" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="152.0" y="14.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="126" lengthAdjust="spacing">42  ·  0x2a  ·  0b101</text><rect x="0" y="22" width="50" height="20" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="25.0" y="36.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="30" lengthAdjust="spacing">float</text><rect x="52" y="22" width="200" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="152.0" y="36.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="78" lengthAdjust="spacing">3.14  ·  1e-3</text><rect x="0" y="44" width="50" height="20" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="25.0" y="58.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="18" lengthAdjust="spacing">str</text><rect x="52" y="44" width="200" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="152.0" y="58.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="78" lengthAdjust="spacing">"hi"  ·  'hi'</text><rect x="0" y="66" width="50" height="20" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="25.0" y="80.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">list</text><rect x="52" y="66" width="200" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="152.0" y="80.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="54" lengthAdjust="spacing">[1, 2, 3]</text><rect x="0" y="88" width="50" height="20" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="25.0" y="102.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">dict</text><rect x="52" y="88" width="200" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="152.0" y="102.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="36" lengthAdjust="spacing">{k: v}</text><rect x="0" y="110" width="50" height="20" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="25.0" y="124.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="18" lengthAdjust="spacing">set</text><rect x="52" y="110" width="200" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="152.0" y="124.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="54" lengthAdjust="spacing">{1, 2, 3}</text></svg>
   <p class="caption">Each Python type has its own literal spellings; ints accept decimal, hex, and binary; strings accept either quote.</p>
-  <p class="score score-high">9.0 · literal spellings per type</p>
+  <p class="score score-mid">8.5 · literal spellings per type; a reference table, kept until a mechanism figure replaces it</p>
 </div>
 <div class="card">
   <p class="eyebrow">Basics · 04</p>
   <h3>Numbers</h3>
-  <svg viewBox="-14 -14 288 106" width="461" height="170" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="8" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">INT · UNBOUNDED</text><line x1="0" y1="22" x2="260" y2="22" stroke="#521000" stroke-width="0.6"/><line x1="0.0" y1="19.0" x2="0.0" y2="25.0" stroke="#521000" stroke-width="0.6"/><line x1="32.5" y1="19.0" x2="32.5" y2="25.0" stroke="#521000" stroke-width="0.6"/><line x1="65.0" y1="19.0" x2="65.0" y2="25.0" stroke="#521000" stroke-width="0.6"/><line x1="97.5" y1="19.0" x2="97.5" y2="25.0" stroke="#521000" stroke-width="0.6"/><line x1="130.0" y1="19.0" x2="130.0" y2="25.0" stroke="#521000" stroke-width="0.6"/><line x1="162.5" y1="19.0" x2="162.5" y2="25.0" stroke="#521000" stroke-width="0.6"/><line x1="195.0" y1="19.0" x2="195.0" y2="25.0" stroke="#521000" stroke-width="0.6"/><line x1="227.5" y1="19.0" x2="227.5" y2="25.0" stroke="#521000" stroke-width="0.6"/><line x1="260.0" y1="19.0" x2="260.0" y2="25.0" stroke="#521000" stroke-width="0.6"/><text x="0" y="50" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">FLOAT · REPRESENTABLE SPACING WIDENS</text><line x1="0" y1="64" x2="260" y2="64" stroke="#521000" stroke-width="0.6"/><line x1="10" y1="61.0" x2="10" y2="67.0" stroke="#521000" stroke-width="0.6"/><line x1="30" y1="61.0" x2="30" y2="67.0" stroke="#521000" stroke-width="0.6"/><line x1="60" y1="61.0" x2="60" y2="67.0" stroke="#521000" stroke-width="0.6"/><line x1="100" y1="61.0" x2="100" y2="67.0" stroke="#521000" stroke-width="0.6"/><line x1="130" y1="61.0" x2="130" y2="67.0" stroke="#521000" stroke-width="0.6"/><line x1="140" y1="61.0" x2="140" y2="67.0" stroke="#521000" stroke-width="0.6"/><line x1="148" y1="61.0" x2="148" y2="67.0" stroke="#521000" stroke-width="0.6"/><line x1="160" y1="61.0" x2="160" y2="67.0" stroke="#521000" stroke-width="0.6"/><line x1="188" y1="61.0" x2="188" y2="67.0" stroke="#521000" stroke-width="0.6"/><line x1="230" y1="61.0" x2="230" y2="67.0" stroke="#521000" stroke-width="0.6"/><line x1="260" y1="61.0" x2="260" y2="67.0" stroke="#521000" stroke-width="0.6"/><circle cx="140" cy="64" r="2.5" fill="#FF4801"/></svg>
+  <svg viewBox="-14 -14 288 106" width="461" height="170" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="8" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">INT · UNBOUNDED</text><line x1="0" y1="22" x2="260" y2="22" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="0.0" y1="19.0" x2="0.0" y2="25.0" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="32.5" y1="19.0" x2="32.5" y2="25.0" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="65.0" y1="19.0" x2="65.0" y2="25.0" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="97.5" y1="19.0" x2="97.5" y2="25.0" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="130.0" y1="19.0" x2="130.0" y2="25.0" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="162.5" y1="19.0" x2="162.5" y2="25.0" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="195.0" y1="19.0" x2="195.0" y2="25.0" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="227.5" y1="19.0" x2="227.5" y2="25.0" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="260.0" y1="19.0" x2="260.0" y2="25.0" stroke="var(--fig-ink)" stroke-width="0.6"/><text x="0" y="50" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">FLOAT · REPRESENTABLE SPACING WIDENS</text><line x1="0" y1="64" x2="260" y2="64" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="10" y1="61.0" x2="10" y2="67.0" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="30" y1="61.0" x2="30" y2="67.0" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="60" y1="61.0" x2="60" y2="67.0" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="100" y1="61.0" x2="100" y2="67.0" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="130" y1="61.0" x2="130" y2="67.0" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="140" y1="61.0" x2="140" y2="67.0" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="148" y1="61.0" x2="148" y2="67.0" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="160" y1="61.0" x2="160" y2="67.0" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="188" y1="61.0" x2="188" y2="67.0" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="230" y1="61.0" x2="230" y2="67.0" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="260" y1="61.0" x2="260" y2="67.0" stroke="var(--fig-ink)" stroke-width="0.6"/><circle cx="140" cy="64" r="2.5" fill="var(--fig-accent)"/></svg>
   <p class="caption">Ints have unbounded precision; floats use IEEE doubles whose representable values thin out near the extremes.</p>
   <p class="score score-high">9.0 · int unbounded vs float thinning, both registers</p>
 </div>
 <div class="card">
   <p class="eyebrow">Basics · 05</p>
   <h3>Booleans</h3>
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+  <svg viewBox="-14 -14 160 92" width="256" height="147" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="64" y="0" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="middle" letter-spacing="0.5">A AND B</text><text x="80" y="16" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">T</text><text x="112" y="16" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">F</text><text x="58" y="36" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="end">T</text><text x="58" y="56" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="end">F</text><rect x="64" y="22" width="32" height="20" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="80.0" y="36.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">T</text><rect x="96" y="22" width="32" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="112.0" y="36.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">F</text><rect x="64" y="42" width="32" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="80.0" y="56.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">F</text><rect x="96" y="42" width="32" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="112.0" y="56.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">F</text></svg>
   <p class="caption">`a and b` returns True only when both are True; otherwise it returns the first falsy value.</p>
   <p class="score score-high">9.0 · 2×2 truth table</p>
 </div>
 <div class="card">
   <p class="eyebrow">Basics · 06</p>
   <h3>Operators</h3>
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+  <svg viewBox="-14 -14 248 120" width="397" height="192" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><circle cx="120" cy="12" r="12" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="120" y="16" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="9" fill="var(--fig-ink)" text-anchor="middle" textLength="5.4" lengthAdjust="spacing">*</text><circle cx="80" cy="50" r="12" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="80" y="54" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="9" fill="var(--fig-ink)" text-anchor="middle" textLength="5.4" lengthAdjust="spacing">+</text><circle cx="180" cy="50" r="10" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="180" y="54" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="9" fill="var(--fig-ink)" text-anchor="middle" textLength="5.4" lengthAdjust="spacing">4</text><circle cx="56" cy="80" r="10" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="56" y="84" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="9" fill="var(--fig-ink)" text-anchor="middle" textLength="5.4" lengthAdjust="spacing">2</text><circle cx="104" cy="80" r="10" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="104" y="84" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="9" fill="var(--fig-ink)" text-anchor="middle" textLength="5.4" lengthAdjust="spacing">3</text><line x1="111.30000679686704" y1="20.264993542976317" x2="88.69999320313296" y2="41.73500645702369" stroke="var(--fig-ink)" stroke-width="1.0"/><line x1="130.13782890665075" y1="18.42062497421214" x2="171.5518092444577" y2="44.649479188156555" stroke="var(--fig-ink)" stroke-width="1.0"/><line x1="72.50365942934691" y1="59.370425713316365" x2="62.246950475544246" y2="72.19131190556969" stroke="var(--fig-ink)" stroke-width="1.0"/><line x1="87.49634057065309" y1="59.370425713316365" x2="97.75304952445576" y2="72.19131190556969" stroke="var(--fig-ink)" stroke-width="1.0"/></svg>
   <p class="caption">An expression like `(2 + 3) * 4` parses as a tree; operator precedence and parentheses determine its shape.</p>
   <p class="score score-high">9.0 · expression tree mechanism</p>
 </div>
 <div class="card">
   <p class="eyebrow">Basics · 07</p>
   <h3>None</h3>
-  <svg viewBox="-14 -14 268 112" width="429" height="179" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="16.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">a</text><rect x="0" y="28" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="44.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">b</text><rect x="0" y="56" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="72.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">c</text><line x1="60" y1="12" x2="151.26933236651425" y2="38.07695210471835" stroke="#521000" stroke-width="1.0"/><polygon points="158,40 150.5001132084016,40.769219158112655 152.0385515246269,35.38468505132405" fill="#521000"/><line x1="60" y1="40" x2="151.0" y2="40.0" stroke="#521000" stroke-width="1.0"/><polygon points="158,40 151.0,42.8 151.0,37.2" fill="#521000"/><line x1="60" y1="68" x2="151.26933236651425" y2="41.92304789528165" stroke="#521000" stroke-width="1.0"/><polygon points="158,40 152.0385515246269,44.61531494867595 150.5001132084016,39.230780841887345" fill="#521000"/><rect x="160" y="24" width="80" height="32" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="164" y="19" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">NONETYPE</text><text x="200.0" y="44.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">None</text></svg>
+  <svg viewBox="-14 -14 268 112" width="429" height="179" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="16.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">a</text><rect x="0" y="28" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="44.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">b</text><rect x="0" y="56" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="72.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">c</text><line x1="60" y1="12" x2="151.26933236651425" y2="38.07695210471835" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="158,40 150.5001132084016,40.769219158112655 152.0385515246269,35.38468505132405" fill="var(--fig-ink)"/><line x1="60" y1="40" x2="151.0" y2="40.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="158,40 151.0,42.8 151.0,37.2" fill="var(--fig-ink)"/><line x1="60" y1="68" x2="151.26933236651425" y2="41.92304789528165" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="158,40 152.0385515246269,44.61531494867595 150.5001132084016,39.230780841887345" fill="var(--fig-ink)"/><rect x="160" y="24" width="80" height="32" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="164" y="19" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">NONETYPE</text><text x="200.0" y="44.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">None</text></svg>
   <p class="caption">`None` is a single object: every name that points at None points at the same object.</p>
   <p class="score score-high">9.0 · three names converging on one None</p>
 </div>
 <div class="card">
   <p class="eyebrow">Basics · 08</p>
   <h3>Variables</h3>
-  <svg viewBox="-14 -14 208 72" width="333" height="115" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="10.0" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="26.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">x</text><rect x="80" y="6" width="70" height="32" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="84" y="1" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">INT</text><text x="115.0" y="26.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">42</text><line x1="62" y1="22.0" x2="71.0" y2="22.0" stroke="#521000" stroke-width="1.0"/><polygon points="78,22.0 71.0,24.8 71.0,19.2" fill="#521000"/></svg>
+  <svg viewBox="-14 -14 198 72" width="317" height="115" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="10.0" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="26.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">message</text><rect x="88" y="6" width="70" height="32" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="92" y="1" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">STR</text><text x="123.0" y="26.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">"hi"</text><line x1="62" y1="22.0" x2="79.0" y2="22.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,22.0 79.0,24.8 79.0,19.2" fill="var(--fig-ink)"/></svg>
   <p class="caption">A name is a label that points at an object. Assignment binds the label; the object exists independently.</p>
   <p class="score score-high">9.5 · the canonical name → object picture</p>
 </div>
 <div class="card">
   <p class="eyebrow">Basics · 09</p>
   <h3>Constants</h3>
-  <svg viewBox="-14 -14 208 72" width="333" height="115" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="10.0" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="26.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">x</text><rect x="80" y="6" width="70" height="32" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="84" y="1" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">INT</text><text x="115.0" y="26.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">42</text><line x1="62" y1="22.0" x2="71.0" y2="22.0" stroke="#521000" stroke-width="1.0"/><polygon points="78,22.0 71.0,24.8 71.0,19.2" fill="#521000"/></svg>
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   <p class="caption">UPPER_CASE is a naming convention, not a language constraint; the binding behaves like any other variable.</p>
-  <p class="score score-high">9.0 · name binding; UPPER_CASE is convention</p>
+  <p class="score score-high">9.0 · name binding with the cell's own MAX_RETRIES → 3; earns-place 0.5, the prose already says it is an ordinary binding; 1.5/0.5/1/1/1 · 1/1/1 · 1/0.5</p>
 </div>
 <div class="card">
   <p class="eyebrow">Basics · 10</p>
   <h3>Truthiness</h3>
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   <p class="caption">bool(x) is True except for a small fixed set: 0, 0.0, "", [], {}, None, False.</p>
   <p class="score score-high">9.0 · bool(x) with the falsy set as a strip</p>
 </div>
 <div class="card">
   <p class="eyebrow">Data Model · 11</p>
   <h3>Equality and Identity</h3>
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   <p class="caption">Two names can share one object (`is` and `==` both true) or hold two equal-but-distinct objects (only `==` true).</p>
   <p class="score score-high">9.0 · shared vs separate object, side-by-side</p>
 </div>
 <div class="card">
   <p class="eyebrow">Data Model · 12</p>
   <h3>Mutability</h3>
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   <p class="caption">Two names share one mutable list — appending through one name changes the object visible through both.</p>
   <p class="score score-high">9.5 · three-state small multiple of aliased mutation</p>
 </div>
 <div class="card">
   <p class="eyebrow">Data Model · 12</p>
   <h3>Mutability</h3>
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   <p class="caption">By contrast, a tuple is frozen — its contents cannot change in place, so aliasing carries no mutation hazard.</p>
   <p class="score score-high">9.5 · three-state small multiple of aliased mutation</p>
 </div>
 <div class="card">
   <p class="eyebrow">Basics · 13</p>
   <h3>Object Lifecycle</h3>
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   <p class="caption">Names keep the same object reachable; deleting one name matters only when it removes the last reference.</p>
   <p class="score score-high">9.0 · names keep object reachable until last reference disappears</p>
 </div>
 <div class="card">
   <p class="eyebrow">Text · 14</p>
   <h3>Strings</h3>
-  <svg viewBox="-14 -14 228 112" width="365" height="179" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="8" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">CODEPOINTS</text><rect x="0" y="16" width="40" height="28" fill="none" stroke="#521000" stroke-width="1.0"/><text x="20.0" y="34.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">c</text><rect x="40" y="16" width="40" height="28" fill="none" stroke="#521000" stroke-width="1.0"/><text x="60.0" y="34.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">a</text><rect x="80" y="16" width="40" height="28" fill="none" stroke="#521000" stroke-width="1.0"/><text x="100.0" y="34.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">f</text><rect x="120" y="16" width="40" height="28" fill="none" stroke="#521000" stroke-width="1.0"/><text x="140.0" y="34.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">é</text><text x="0" y="60" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">UTF-8 BYTES</text><rect x="0" y="68" width="40" height="14" fill="none" stroke="#521000" stroke-width="1.0"/><text x="20.0" y="79.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">63</text><rect x="40" y="68" width="40" height="14" fill="none" stroke="#521000" stroke-width="1.0"/><text x="60.0" y="79.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">61</text><rect x="80" y="68" width="40" height="14" fill="none" stroke="#521000" stroke-width="1.0"/><text x="100.0" y="79.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">66</text><rect x="120" y="68" width="20" height="14" fill="none" stroke="#521000" stroke-width="1.0"/><text x="130.0" y="79.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">c3</text><rect x="140" y="68" width="20" height="14" fill="none" stroke="#521000" stroke-width="1.0"/><text x="150.0" y="79.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">a9</text></svg>
+  <svg viewBox="-14 -14 228 112" width="365" height="179" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="8" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">CODEPOINTS</text><rect x="0" y="16" width="40" height="28" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="20.0" y="34.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">c</text><rect x="40" y="16" width="40" height="28" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="60.0" y="34.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">a</text><rect x="80" y="16" width="40" height="28" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="100.0" y="34.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">f</text><rect x="120" y="16" width="40" height="28" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="140.0" y="34.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">é</text><text x="0" y="60" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">UTF-8 BYTES</text><rect x="0" y="68" width="40" height="14" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="20.0" y="79.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="12" lengthAdjust="spacing">63</text><rect x="40" y="68" width="40" height="14" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="60.0" y="79.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="12" lengthAdjust="spacing">61</text><rect x="80" y="68" width="40" height="14" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="100.0" y="79.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="12" lengthAdjust="spacing">66</text><rect x="120" y="68" width="20" height="14" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="130.0" y="79.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="12" lengthAdjust="spacing">c3</text><rect x="140" y="68" width="20" height="14" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="150.0" y="79.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="12" lengthAdjust="spacing">a9</text></svg>
   <p class="caption">Strings are sequences of Unicode codepoints. UTF-8 encoding turns them into bytes; `é` takes two bytes, `c` takes one.</p>
   <p class="score score-high">9.0 · codepoints + bytes registers</p>
 </div>
 <div class="card">
   <p class="eyebrow">Text · 15</p>
   <h3>Bytes and Bytearray</h3>
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-  <p class="caption">bytes is a frozen sequence of integers; bytearray is the mutable counterpart with append/extend/etc.</p>
-  <p class="score score-high">9.0 · frozen vs mutable contrast</p>
+  <svg viewBox="-14 -14 228 118" width="365" height="189" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="4" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">BYTES — FROZEN</text><rect x="0" y="12" width="44" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="22.0" y="27.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">0x70</text><rect x="44" y="12" width="44" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="66.0" y="27.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">0x79</text><text x="98" y="27" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="start">b"py"</text><text x="0" y="48" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">BYTEARRAY — MUTABLE</text><polygon points="22,61 18,55 26,55" fill="var(--fig-accent)"/><rect x="0" y="62" width="44" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="22.0" y="77.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">0x50</text><rect x="44" y="62" width="44" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="66.0" y="77.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">0x79</text><text x="98" y="70" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="start">packet[0] = ord("P")</text><text x="98" y="84" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="start">bytearray(b'Py')</text></svg>
+  <p class="caption">Both objects hold the same two bytes as integers; b"py" cannot change, while packet[0] = ord("P") rewrites the first slot of the bytearray in place.</p>
+  <p class="score score-high">9.5 · the example's two bytes as integer slots, packet[0] rewritten in place, anchored to the mutating cell; 1.5/0.75/1/1/1 · 1/1/1 · 1/0.5</p>
 </div>
 <div class="card">
   <p class="eyebrow">Text · 16</p>
   <h3>String Formatting</h3>
-  <svg viewBox="-14 -14 248 92" width="397" height="147" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="4" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">FORMAT SPEC</text><rect x="0" y="16" width="36" height="18" fill="none" stroke="#521000" stroke-width="1.0"/><text x="18.0" y="29.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">align</text><rect x="38" y="16" width="30" height="18" fill="none" stroke="#521000" stroke-width="1.0"/><text x="53.0" y="29.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">sign</text><rect x="70" y="16" width="40" height="18" fill="none" stroke="#521000" stroke-width="1.0"/><text x="90.0" y="29.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">width</text><rect x="112" y="16" width="22" height="18" fill="none" stroke="#521000" stroke-width="1.0"/><text x="123.0" y="29.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">,</text><rect x="136" y="16" width="44" height="18" fill="none" stroke="#521000" stroke-width="1.0"/><text x="158.0" y="29.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">.prec</text><rect x="182" y="16" width="32" height="18" fill="none" stroke="#521000" stroke-width="1.0"/><text x="198.0" y="29.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">type</text><text x="0" y="54" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="start">{:&gt;6,.2f}</text></svg>
-  <p class="caption">The format spec is a railroad of named optional fields: alignment, sign, width, precision, type.</p>
-  <p class="score score-high">9.0 · format-spec railroad</p>
+  <svg viewBox="-14 -14 400 110" width="640" height="176" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><line x1="0" y1="36" x2="10" y2="36" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="10" y1="36" x2="10" y2="18" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="10" y1="18" x2="60" y2="18" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="60" y1="18" x2="60" y2="36" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="10" y1="36" x2="16" y2="36" stroke="var(--fig-ink)" stroke-width="0.6"/><rect x="16" y="27" width="38" height="18" fill="none" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><text x="35.0" y="40.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="30" lengthAdjust="spacing">align</text><line x1="54" y1="36" x2="60" y2="36" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="66" y1="36" x2="66" y2="18" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="66" y1="18" x2="110" y2="18" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="110" y1="18" x2="110" y2="36" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="66" y1="36" x2="72" y2="36" stroke="var(--fig-ink)" stroke-width="0.6"/><rect x="72" y="27" width="32" height="18" fill="none" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><text x="88.0" y="40.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">sign</text><line x1="104" y1="36" x2="110" y2="36" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="116" y1="36" x2="122" y2="36" stroke="var(--fig-ink)" stroke-width="0.6"/><rect x="122" y="27" width="14" height="18" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="129.0" y="40.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">0</text><line x1="136" y1="36" x2="142" y2="36" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="148" y1="36" x2="154" y2="36" stroke="var(--fig-ink)" stroke-width="0.6"/><rect x="154" y="27" width="38" height="18" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="173.0" y="40.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="30" lengthAdjust="spacing">width</text><line x1="192" y1="36" x2="198" y2="36" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="204" y1="36" x2="204" y2="18" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="204" y1="18" x2="230" y2="18" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="230" y1="18" x2="230" y2="36" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="204" y1="36" x2="210" y2="36" stroke="var(--fig-ink)" stroke-width="0.6"/><rect x="210" y="27" width="14" height="18" fill="none" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><text x="217.0" y="40.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">,</text><line x1="224" y1="36" x2="230" y2="36" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="236" y1="36" x2="242" y2="36" stroke="var(--fig-ink)" stroke-width="0.6"/><rect x="242" y="27" width="62" height="18" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="273.0" y="40.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="54" lengthAdjust="spacing">precision</text><line x1="304" y1="36" x2="310" y2="36" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="316" y1="36" x2="322" y2="36" stroke="var(--fig-ink)" stroke-width="0.6"/><rect x="322" y="27" width="32" height="18" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="338.0" y="40.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">type</text><line x1="354" y1="36" x2="360" y2="36" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="360" y1="36" x2="370" y2="36" stroke="var(--fig-ink)" stroke-width="0.6"/><text x="0" y="62" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">THIS CELL</text><text x="0" y="76" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="start" textLength="78" lengthAdjust="spacing">{score:05.1f}</text></svg>
+  <p class="caption">The format spec is a railroad of optional stations in a fixed order; this cell's 05.1f visits zero-pad, width, precision and type and bypasses the rest.</p>
+  <p class="score score-high">9.0 · railroad tracing the cell's 05.1f; one-move 0.75, restraint 0.75 and fit 0.75: still the densest figure in the set at the banner ceiling; 1.5/1/0.75/1/1 · 1/1/0.75 · 0.75/0.5</p>
 </div>
 <div class="card">
   <p class="eyebrow">Control Flow · 17</p>
   <h3>Conditionals</h3>
-  <svg viewBox="-14 -14 260 128" width="416" height="205" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="36" width="52" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="26.0" y="51.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">value</text><line x1="52" y1="47" x2="73.0" y2="47.0" stroke="#521000" stroke-width="1.0"/><polygon points="80,47 73.0,49.8 73.0,44.2" fill="#521000"/><circle cx="98" cy="47" r="14" fill="none" stroke="#521000" stroke-width="1.0"/><text x="98" y="51" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="9" fill="#521000" text-anchor="middle">?</text><line x1="110" y1="38" x2="151.7390096630006" y2="17.130495168499706" stroke="#521000" stroke-width="1.0"/><polygon points="158,14 152.99120773040048,19.63489130329947 150.4868115956007,14.626099033699942" fill="#521000"/><line x1="110" y1="56" x2="151.7390096630006" y2="76.8695048315003" stroke="#521000" stroke-width="1.0"/><polygon points="158,80 150.4868115956007,79.37390096630006 152.99120773040048,74.36510869670053" fill="#521000"/><rect x="160" y="4" width="68" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="194.0" y="19.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">case A</text><rect x="160" y="70" width="68" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="194.0" y="85.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">case B</text></svg>
+  <svg viewBox="-14 -14 260 128" width="416" height="205" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="36" width="52" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="26.0" y="51.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="30" lengthAdjust="spacing">value</text><line x1="52" y1="47" x2="73.0" y2="47.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="80,47 73.0,49.8 73.0,44.2" fill="var(--fig-ink)"/><circle cx="98" cy="47" r="14" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="98" y="51" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="9" fill="var(--fig-ink)" text-anchor="middle" textLength="5.4" lengthAdjust="spacing">?</text><line x1="110" y1="38" x2="151.7390096630006" y2="17.130495168499706" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="158,14 152.99120773040048,19.63489130329947 150.4868115956007,14.626099033699942" fill="var(--fig-ink)"/><line x1="110" y1="56" x2="151.7390096630006" y2="76.8695048315003" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="158,80 150.4868115956007,79.37390096630006 152.99120773040048,74.36510869670053" fill="var(--fig-ink)"/><rect x="160" y="4" width="68" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="194.0" y="19.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="36" lengthAdjust="spacing">case A</text><rect x="160" y="70" width="68" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="194.0" y="85.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="36" lengthAdjust="spacing">case B</text></svg>
   <p class="caption">A predicate sorts a value into one of several branches; if/elif/else is the explicit spelling.</p>
   <p class="score score-high">9.0 · predicate forks value to branch</p>
 </div>
 <div class="card">
   <p class="eyebrow">Control Flow · 18</p>
   <h3>Guard Clauses</h3>
-  <svg viewBox="-14 -14 292 132" width="467" height="211" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="180" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="90.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">if not valid: return</text><rect x="0" y="24" width="180" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="90.0" y="39.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">if missing: return None</text><rect x="0" y="48" width="180" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="90.0" y="63.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">if special_case: return X</text><rect x="0" y="78" width="180" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="90.0" y="93.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">main work …</text><line x1="190" y1="11" x2="213.0" y2="11.0" stroke="#521000" stroke-width="1.0"/><polygon points="220,11 213.0,13.8 213.0,8.2" fill="#521000"/><line x1="190" y1="35" x2="213.0" y2="35.0" stroke="#521000" stroke-width="1.0"/><polygon points="220,35 213.0,37.8 213.0,32.2" fill="#521000"/><line x1="190" y1="59" x2="213.0" y2="59.0" stroke="#521000" stroke-width="1.0"/><polygon points="220,59 213.0,61.8 213.0,56.2" fill="#521000"/><text x="222" y="38" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="start">exit</text></svg>
+  <svg viewBox="-14 -14 292 132" width="467" height="211" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="180" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="90.0" y="15.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="120" lengthAdjust="spacing">if not valid: return</text><rect x="0" y="24" width="180" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="90.0" y="39.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="138" lengthAdjust="spacing">if missing: return None</text><rect x="0" y="48" width="180" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="90.0" y="63.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="150" lengthAdjust="spacing">if special_case: return X</text><rect x="0" y="78" width="180" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="90.0" y="93.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="66" lengthAdjust="spacing">main work …</text><line x1="190" y1="11" x2="213.0" y2="11.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="220,11 213.0,13.8 213.0,8.2" fill="var(--fig-ink)"/><line x1="190" y1="35" x2="213.0" y2="35.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="220,35 213.0,37.8 213.0,32.2" fill="var(--fig-ink)"/><line x1="190" y1="59" x2="213.0" y2="59.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="220,59 213.0,61.8 213.0,56.2" fill="var(--fig-ink)"/><text x="222" y="38" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="start">exit</text></svg>
   <p class="caption">Early returns handle the exceptional cases first so the main work is the body of the function, not its tail.</p>
   <p class="score score-high">9.0 · early returns, main body at the tail</p>
 </div>
 <div class="card">
   <p class="eyebrow">Control Flow · 19</p>
   <h3>Assignment Expressions</h3>
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   <p class="caption">The walrus binds a name during the surrounding expression; one expression, two outputs.</p>
   <p class="score score-high">9.0 · walrus binds while comparing</p>
 </div>
 <div class="card">
   <p class="eyebrow">Control Flow · 20</p>
   <h3>For Loops</h3>
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   <p class="caption">Each call to next() advances the caret one cell along the iterable — the same shape behind range(), strings, and any sequence.</p>
   <p class="score score-high">9.0 · 4-row caret advance</p>
 </div>
 <div class="card">
   <p class="eyebrow">Control Flow · 21</p>
   <h3>Break and Continue</h3>
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+  <svg viewBox="-14 -14 172 144" width="275" height="230" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="28" width="28" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="14.0" y="44.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">a</text><rect x="28" y="28" width="28" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="42.0" y="44.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">b</text><rect x="56" y="28" width="28" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="70.0" y="44.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">c</text><rect x="84" y="28" width="28" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="98.0" y="44.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">d</text><rect x="112" y="28" width="28" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="126.0" y="44.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">e</text><circle cx="70" cy="40" r="2.5" fill="var(--fig-ink)"/><line x1="70" y1="56" x2="70.0" y2="71.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="70,78 67.2,71.0 72.8,71.0" fill="var(--fig-accent)"/><rect x="40" y="80" width="80" height="24" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="80.0" y="96.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="78" lengthAdjust="spacing">found · break</text><text x="70" y="14" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">first match</text></svg>
   <p class="caption">break exits the loop; continue skips to the next iteration. Both interrupt the natural fall-through.</p>
   <p class="score score-high">9.0 · early exit at first match</p>
 </div>
 <div class="card">
   <p class="eyebrow">Control Flow · 22</p>
   <h3>Loop Else</h3>
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+  <svg viewBox="-14 -14 340 104" width="544" height="166" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="20" width="110" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="55.0" y="36.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="54" lengthAdjust="spacing">loop body</text><line x1="110" y1="20" x2="143.7390096630006" y2="3.1304951684997055" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="150,0 144.99120773040048,5.63489130329947 142.4868115956007,0.6260990336999415" fill="var(--fig-accent)"/><rect x="152" y="0" width="160" height="20" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="232.0" y="14.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="144" lengthAdjust="spacing">fell through · else runs</text><line x1="110" y1="44" x2="143.29521600345194" y2="53.98856480103558" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="150,56 142.49064192386618,56.670478399654804 144.0997900830377,51.306651202416354" fill="var(--fig-ink)"/><rect x="152" y="50" width="160" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="232.0" y="64.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="120" lengthAdjust="spacing">broke · else skipped</text></svg>
   <p class="caption">The loop's else branch runs only when the loop falls through naturally; break skips it.</p>
   <p class="score score-high">9.0 · fell-through vs broke, two outcomes</p>
 </div>
 <div class="card">
   <p class="eyebrow">Iteration · 23</p>
   <h3>Iterating over Iterables</h3>
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+  <svg viewBox="-14 -14 332 98" width="531" height="157" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="30" width="82" height="28" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="4" y="25" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">ITERABLE</text><text x="41.0" y="48.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">[a,b,c]</text><line x1="84" y1="44" x2="118" y2="44" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><text x="101" y="38" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">iter()</text><rect x="120" y="30" width="80" height="28" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="124" y="25" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">ITERATOR</text><line x1="200" y1="44" x2="225.0" y2="44.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="232,44 225.0,46.8 225.0,41.2" fill="var(--fig-accent)"/><text x="216" y="38" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">next()</text><rect x="234" y="32" width="22" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="245.0" y="48.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">a</text><rect x="256" y="32" width="22" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="267.0" y="48.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">b</text><rect x="278" y="32" width="22" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="289.0" y="48.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">c</text></svg>
   <p class="caption">`for` desugars to iter()+next(): one iter() call, then next() until StopIteration ends the loop.</p>
   <p class="score score-high">9.0 · iter() exposes the iterator</p>
 </div>
 <div class="card">
   <p class="eyebrow">Iteration · 24</p>
   <h3>Iterators</h3>
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+  <svg viewBox="-14 -14 332 98" width="531" height="157" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="30" width="82" height="28" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="4" y="25" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">ITERABLE</text><text x="41.0" y="48.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">[a,b,c]</text><line x1="84" y1="44" x2="118" y2="44" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><text x="101" y="38" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">iter()</text><rect x="120" y="30" width="80" height="28" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="124" y="25" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">ITERATOR</text><line x1="200" y1="44" x2="225.0" y2="44.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="232,44 225.0,46.8 225.0,41.2" fill="var(--fig-accent)"/><text x="216" y="38" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">next()</text><rect x="234" y="32" width="22" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="245.0" y="48.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">a</text><rect x="256" y="32" width="22" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="267.0" y="48.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">b</text><rect x="278" y="32" width="22" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="289.0" y="48.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">c</text></svg>
   <p class="caption">iter() exposes the iterator behind for; next() pulls one value at a time until exhausted.</p>
   <p class="score score-high">9.0 · three-state machine</p>
 </div>
 <div class="card">
   <p class="eyebrow">Iteration · 25</p>
   <h3>Iterator vs Iterable</h3>
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+  <svg viewBox="-14 -14 332 98" width="531" height="157" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="30" width="82" height="28" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="4" y="25" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">ITERABLE</text><text x="41.0" y="48.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">[a,b,c]</text><line x1="84" y1="44" x2="118" y2="44" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><text x="101" y="38" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">iter()</text><rect x="120" y="30" width="80" height="28" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="124" y="25" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">ITERATOR</text><line x1="200" y1="44" x2="225.0" y2="44.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="232,44 225.0,46.8 225.0,41.2" fill="var(--fig-accent)"/><text x="216" y="38" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">next()</text><rect x="234" y="32" width="22" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="245.0" y="48.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">a</text><rect x="256" y="32" width="22" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="267.0" y="48.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">b</text><rect x="278" y="32" width="22" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="289.0" y="48.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">c</text></svg>
   <p class="caption">An iterable knows how to produce an iterator (via iter()); the iterator knows how to produce values (via next()).</p>
   <p class="score score-high">9.0 · the protocol exposed</p>
 </div>
 <div class="card">
   <p class="eyebrow">Iteration · 25</p>
   <h3>Iterator vs Iterable</h3>
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+  <svg viewBox="-14 -14 248 158" width="397" height="253" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="20" y="8" width="24" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="32.0" y="24.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">a</text><rect x="44" y="8" width="24" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="56.0" y="24.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">b</text><rect x="68" y="8" width="24" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="80.0" y="24.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" 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   <p class="caption">The iterator's caret only moves forward — after the first `list(stream)` drains it, nothing is left for the second.</p>
   <p class="score score-high">9.0 · the protocol exposed</p>
 </div>
 <div class="card">
   <p class="eyebrow">Iteration · 26</p>
   <h3>Sentinel Iteration</h3>
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-  <p class="caption">`iter(callable, sentinel)` calls the callable repeatedly, stopping when it returns the sentinel.</p>
-  <p class="score score-high">9.0 · iter(callable, sentinel) stop condition</p>
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+  <p class="caption">iter(read_chunk, "") keeps calling read_chunk and yields "py" and "thon"; the empty string is the sentinel, so it stops the loop and is never yielded.</p>
+  <p class="score score-high">9.0 · the cell's read_chunk and chunks; the empty string ghosted as the sentinel; earns-place 0.75, the output already omits it; 1.5/0.75/1/1/1 · 1/1/1 · 1/0.5</p>
 </div>
 <div class="card">
   <p class="eyebrow">Control Flow · 27</p>
   <h3>Match Statements</h3>
-  <svg viewBox="-14 -14 288 158" width="461" height="253" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="170" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="85.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">match value</text><rect x="0" y="30" width="170" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="85.0" y="44.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">case 0:</text><rect x="0" y="52" width="170" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="85.0" y="66.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">case [x, y]:</text><rect x="0" y="74" width="170" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="85.0" y="88.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">case Point(0, _):</text><rect x="0" y="96" width="170" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="85.0" y="110.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">case _:</text><line x1="186" y1="32" x2="186" y2="122" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><circle cx="186" cy="74" r="2.5" fill="#521000"/><line x1="186" y1="110" x2="186.0" y2="117.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="186,124 183.2,117.0 188.8,117.0" fill="#FF4801"/><text x="196" y="76" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="start">first match</text></svg>
+  <svg viewBox="-14 -14 288 158" width="461" height="253" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="170" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="85.0" y="15.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="66" lengthAdjust="spacing">match value</text><rect x="0" y="30" width="170" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="85.0" y="44.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">case 0:</text><rect x="0" y="52" width="170" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="85.0" y="66.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="72" lengthAdjust="spacing">case [x, y]:</text><rect x="0" y="74" width="170" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="85.0" y="88.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="102" lengthAdjust="spacing">case Point(0, _):</text><rect x="0" y="96" width="170" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="85.0" y="110.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">case _:</text><line x1="186" y1="32" x2="186" y2="104" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><circle cx="186" cy="74" r="2.5" fill="var(--fig-ink)"/><line x1="186" y1="104" x2="186.0" y2="117.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="186,124 183.2,117.0 188.8,117.0" fill="var(--fig-accent)"/><text x="196" y="76" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="start">first match</text></svg>
   <p class="caption">match dispatches by pattern shape; the value flows down the patterns and the first match wins.</p>
   <p class="score score-high">9.0 · dispatch ladder; first match wins</p>
 </div>
 <div class="card">
   <p class="eyebrow">Control Flow · 28</p>
   <h3>Advanced Match Patterns</h3>
-  <svg viewBox="-14 -14 300 124" width="480" height="198" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="90" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="45.0" y="14.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">capture</text><rect x="92" y="0" width="180" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="182.0" y="14.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">[x, y]</text><rect x="0" y="22" width="90" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="45.0" y="36.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">alternative</text><rect x="92" y="22" width="180" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="182.0" y="36.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">P() | Q()</text><rect x="0" y="44" width="90" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="45.0" y="58.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">guard</text><rect x="92" y="44" width="180" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="182.0" y="58.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">[x] if x &gt; 0</text><rect x="0" y="66" width="90" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="45.0" y="80.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">class</text><rect x="92" y="66" width="180" height="20" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="182.0" y="80.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">Point(x=0, y=_)</text></svg>
+  <svg viewBox="-14 -14 300 124" width="480" height="198" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="90" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="45.0" y="14.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">capture</text><rect x="92" y="0" width="180" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="182.0" y="14.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="36" lengthAdjust="spacing">[x, y]</text><rect x="0" y="22" width="90" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="45.0" y="36.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="66" lengthAdjust="spacing">alternative</text><rect x="92" y="22" width="180" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="182.0" y="36.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="54" lengthAdjust="spacing">P() | Q()</text><rect x="0" y="44" width="90" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="45.0" y="58.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="30" lengthAdjust="spacing">guard</text><rect x="92" y="44" width="180" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="182.0" y="58.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="72" lengthAdjust="spacing">[x] if x &gt; 0</text><rect x="0" y="66" width="90" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="45.0" y="80.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="30" lengthAdjust="spacing">class</text><rect x="92" y="66" width="180" height="20" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="182.0" y="80.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="90" lengthAdjust="spacing">Point(x=0, y=_)</text></svg>
   <p class="caption">Capture, alternative, guard, and class patterns each name a different way a value can match a case.</p>
   <p class="score score-high">9.0 · four pattern variants</p>
 </div>
 <div class="card">
   <p class="eyebrow">Control Flow · 29</p>
   <h3>While Loops</h3>
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   <p class="caption">`while` repeats the body while the test stays true; the back-edge returns control to the test before each pass.</p>
   <p class="score score-high">9.0 · back-edge mechanism plus the three stopping rules</p>
 </div>
 <div class="card">
   <p class="eyebrow">Control Flow · 29</p>
   <h3>While Loops</h3>
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+  <svg viewBox="-14 -14 288 128" width="461" height="205" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="8" width="70" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="35.0" y="23.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="18" lengthAdjust="spacing">for</text><line x1="70" y1="19" x2="97.0" y2="19.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="104,19 97.0,21.8 97.0,16.2" fill="var(--fig-ink)"/><rect x="106" y="8" width="150" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="181.0" y="23.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="108" lengthAdjust="spacing">iterable exhausted</text><rect x="0" y="38" width="70" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="35.0" y="53.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="30" lengthAdjust="spacing">while</text><line x1="70" y1="49" x2="97.0" y2="49.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="104,49 97.0,51.8 97.0,46.2" fill="var(--fig-ink)"/><rect x="106" y="38" width="150" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="181.0" y="53.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="90" lengthAdjust="spacing">condition false</text><rect x="0" y="68" width="70" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="35.0" y="83.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="48" lengthAdjust="spacing">sentinel</text><line x1="70" y1="79" x2="97.0" y2="79.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="104,79 97.0,81.8 97.0,76.2" fill="var(--fig-accent)"/><rect x="106" y="68" width="150" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="181.0" y="83.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="90" lengthAdjust="spacing">marker returned</text></svg>
   <p class="caption">Each loop shape has its own stopping rule: `for` ends when the iterable is exhausted, `while` when the condition turns false, sentinel iteration when the marker value appears.</p>
   <p class="score score-high">9.0 · back-edge mechanism plus the three stopping rules</p>
 </div>
 <div class="card">
   <p class="eyebrow">Collections · 30</p>
   <h3>Lists</h3>
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+  <svg viewBox="-14 -14 248 64" width="397" height="102" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="8" width="24" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="12.0" y="24.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">3</text><rect x="24" y="8" width="24" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="36.0" y="24.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">1</text><rect x="48" y="8" width="24" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="60.0" y="24.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">4</text><rect x="72" y="8" width="24" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><text x="84.0" y="24.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="12" lengthAdjust="spacing">+1</text><line x1="98" y1="20" x2="125.0" y2="20.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="132,20 125.0,22.8 125.0,17.2" fill="var(--fig-accent)"/><text x="136" y="18" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="start">.append</text></svg>
   <p class="caption">Lists are mutable sequences. `.append` extends the same list object — no new list is created.</p>
   <p class="score score-high">9.0 · cells with append mechanism</p>
 </div>
 <div class="card">
   <p class="eyebrow">Collections · 31</p>
   <h3>Tuples</h3>
-  <svg viewBox="-14 -14 308 76" width="493" height="122" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="0" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">FROZEN SEQUENCE</text><rect x="0" y="12" width="180" height="26" fill="none" stroke="#521000" stroke-width="1.0"/><text x="90.0" y="29.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">(3, 1, 4, 1)</text><line x1="45" y1="8" x2="45" y2="42" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="90" y1="8" x2="90" y2="42" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="135" y1="8" x2="135" y2="42" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><rect x="190" y="12" width="80" height="26" fill="none" stroke="#521000" stroke-width="0.5" opacity="0.4"/><text x="230.0" y="29.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">.append</text><line x1="190" y1="24" x2="270" y2="24" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/></svg>
+  <svg viewBox="-14 -14 308 76" width="493" height="122" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="0" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">FROZEN SEQUENCE</text><rect x="0" y="12" width="180" height="26" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="90.0" y="29.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="72" lengthAdjust="spacing">(3, 1, 4, 1)</text><line x1="45" y1="8" x2="45" y2="42" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="90" y1="8" x2="90" y2="42" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="135" y1="8" x2="135" y2="42" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><rect x="190" y="12" width="80" height="26" fill="none" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><text x="230.0" y="29.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">.append</text><line x1="190" y1="24" x2="270" y2="24" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/></svg>
   <p class="caption">Tuples are ordered, immutable sequences; positions matter, contents do not change once constructed.</p>
   <p class="score score-high">9.0 · frozen sequence with struck-through .append</p>
 </div>
 <div class="card">
   <p class="eyebrow">Collections · 31</p>
   <h3>Tuples</h3>
-  <svg viewBox="-14 -14 248 64" width="397" height="102" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="8" width="24" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="12.0" y="24.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">3</text><rect x="24" y="8" width="24" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="36.0" y="24.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">1</text><rect x="48" y="8" width="24" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="60.0" y="24.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">4</text><rect x="72" y="8" width="24" height="24" fill="none" stroke="#521000" stroke-width="0.5" opacity="0.4"/><text x="84.0" y="24.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">+1</text><line x1="98" y1="20" x2="125.0" y2="20.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="132,20 125.0,22.8 125.0,17.2" fill="#FF4801"/><text x="136" y="18" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="start">.append</text></svg>
+  <svg viewBox="-14 -14 248 64" width="397" height="102" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="8" width="24" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="12.0" y="24.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">3</text><rect x="24" y="8" width="24" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="36.0" y="24.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">1</text><rect x="48" y="8" width="24" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="60.0" y="24.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">4</text><rect x="72" y="8" width="24" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><text x="84.0" y="24.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="12" lengthAdjust="spacing">+1</text><line x1="98" y1="20" x2="125.0" y2="20.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="132,20 125.0,22.8 125.0,17.2" fill="var(--fig-accent)"/><text x="136" y="18" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="start">.append</text></svg>
   <p class="caption">A list is the other intent: a variable number of similar items, growing in place with `.append`.</p>
   <p class="score score-high">9.0 · frozen sequence with struck-through .append</p>
 </div>
 <div class="card">
   <p class="eyebrow">Collections · 32</p>
   <h3>Unpacking</h3>
-  <svg viewBox="-14 -14 180 108" width="288" height="173" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="30" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="15.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">1</text><rect x="30" y="0" width="30" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="45.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">2</text><rect x="60" y="0" width="30" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="75.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">3</text><rect x="90" y="0" width="30" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="105.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">4</text><rect x="120" y="0" width="30" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="135.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">5</text><rect x="0" y="58" width="30" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="15.0" y="73.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">a</text><rect x="30" y="58" width="90" height="22" fill="none" stroke="#521000" stroke-width="0.5" opacity="0.4"/><text x="75.0" y="73.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">*rest</text><rect x="120" y="58" width="30" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="135.0" y="73.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">b</text><line x1="15" y1="22" x2="15" y2="58" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="45" y1="22" x2="75" y2="58" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="75" y1="22" x2="75" y2="58" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="105" y1="22" x2="75" y2="58" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="135" y1="22" x2="135" y2="58" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/></svg>
+  <svg viewBox="-14 -14 180 108" width="288" height="173" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="30" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="15.0" y="15.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">1</text><rect x="30" y="0" width="30" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="45.0" y="15.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">2</text><rect x="60" y="0" width="30" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="75.0" y="15.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">3</text><rect x="90" y="0" width="30" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="105.0" y="15.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">4</text><rect x="120" y="0" width="30" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="135.0" y="15.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">5</text><rect x="0" y="58" width="30" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="15.0" y="73.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">a</text><rect x="30" y="58" width="90" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><text x="75.0" y="73.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="30" lengthAdjust="spacing">*rest</text><rect x="120" y="58" width="30" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="135.0" y="73.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">b</text><line x1="15" y1="22" x2="15" y2="58" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="45" y1="22" x2="75" y2="58" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="75" y1="22" x2="75" y2="58" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="105" y1="22" x2="75" y2="58" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="135" y1="22" x2="135" y2="58" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/></svg>
   <p class="caption">Left-side names bind to right-side positions; `*rest` gathers the middle into a list.</p>
   <p class="score score-high">9.0 · binding-line mechanism with *rest</p>
 </div>
 <div class="card">
   <p class="eyebrow">Collections · 33</p>
   <h3>Dictionaries</h3>
-  <svg viewBox="-14 -14 298 116" width="477" height="186" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="12" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">HASH → BUCKET</text><text x="0" y="34" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="start">0</text><rect x="14" y="18" width="80" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="54.0" y="34.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">"a" → 1</text><text x="0" y="58" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="start">1</text><rect x="14" y="42" width="80" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="54.0" y="58.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">"b" → 2</text><text x="0" y="82" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="start">2</text><rect x="14" y="66" width="80" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="54.0" y="82.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">"c" → 3</text><line x1="96" y1="54" x2="125.0" y2="54.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="132,54 125.0,56.8 125.0,51.2" fill="#FF4801"/><rect x="134" y="42" width="80" height="24" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="174.0" y="58.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">"d" → 4</text><text x="218" y="58" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="start">collision</text></svg>
-  <p class="caption">Each key is hashed to a bucket; collisions chain into the next slot. Lookup is constant-time on average.</p>
-  <p class="score score-high">9.0 · hash buckets with collision chain</p>
+  <svg viewBox="-14 -14 316 120" width="506" height="192" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="120" y="6" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">SLOTS</text><rect x="120" y="12" width="150" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="195.0" y="27.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="84" lengthAdjust="spacing">"name" → "Ada"</text><text x="278" y="27" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="start">0</text><rect x="120" y="38" width="150" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="195.0" y="53.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="126" lengthAdjust="spacing">"language" → "Python"</text><text x="278" y="53" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="start">1</text><rect x="120" y="64" width="150" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="195.0" y="79.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="78" lengthAdjust="spacing">"year" → 1843</text><text x="278" y="79" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="start">2</text><rect x="0" y="64" width="78" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="39.0" y="79.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="72" lengthAdjust="spacing">hash("year")</text><line x1="78" y1="75" x2="111.0" y2="75.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="118,75 111.0,77.8 111.0,72.2" fill="var(--fig-accent)"/></svg>
+  <p class="caption">hash(key) picks the slot: "year" lands in an empty one, and profile["name"] goes straight to its slot without scanning the other entries.</p>
+  <p class="score score-high">9.0 · the cell's own keys hashed to slots, the insert of "year" accented; earns-place 0.75, one-move 0.75 since insert and lookup share the caption; 1.5/0.75/0.75/1/1 · 1/1/1 · 1/0.5</p>
 </div>
 <div class="card">
   <p class="eyebrow">Collections · 34</p>
   <h3>Sets</h3>
-  <svg viewBox="-14 -14 184 118" width="294" height="189" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="4" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">KEYS ONLY</text><rect x="0" y="14" width="50" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="25.0" y="28.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">a</text><rect x="0" y="36" width="50" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="25.0" y="50.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">b</text><rect x="0" y="58" width="50" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="25.0" y="72.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">c</text><line x1="50" y1="36" x2="83.0" y2="36.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="90,36 83.0,38.8 83.0,33.2" fill="#FF4801"/><text x="70" y="28" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">x in s</text><rect x="92" y="24" width="60" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="122.0" y="39.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">O(1)</text></svg>
+  <svg viewBox="-14 -14 184 118" width="294" height="189" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="4" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">KEYS ONLY</text><rect x="0" y="14" width="50" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="25.0" y="28.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">a</text><rect x="0" y="36" width="50" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="25.0" y="50.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">b</text><rect x="0" y="58" width="50" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="25.0" y="72.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">c</text><line x1="50" y1="36" x2="83.0" y2="36.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="90,36 83.0,38.8 83.0,33.2" fill="var(--fig-accent)"/><text x="70" y="28" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">x in s</text><rect x="92" y="24" width="60" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="122.0" y="39.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">O(1)</text></svg>
   <p class="caption">Sets are hash buckets without values; `x in s` averages O(1) regardless of size.</p>
   <p class="score score-high">9.0 · hash buckets without values</p>
 </div>
 <div class="card">
   <p class="eyebrow">Collections · 35</p>
   <h3>Slices</h3>
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+  <svg viewBox="-14 -14 260 148" width="416" height="237" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="20" y="30" width="32" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="36.0" y="46.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">a</text><rect x="52" y="30" width="32" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="68.0" y="46.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">b</text><rect x="84" y="30" width="32" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="100.0" y="46.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">c</text><rect x="116" y="30" width="32" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="132.0" y="46.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">d</text><rect x="148" y="30" width="32" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="164.0" y="46.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">e</text><rect x="180" y="30" width="32" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="196.0" y="46.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">f</text><line x1="20" y1="64" x2="212" y2="64" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="20" y1="61.0" x2="20" y2="67.0" stroke="var(--fig-ink)" stroke-width="0.6"/><text x="20" y="76" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">0</text><line x1="52" y1="61.0" x2="52" y2="67.0" stroke="var(--fig-ink)" stroke-width="0.6"/><text x="52" y="76" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">1</text><line x1="84" y1="61.0" x2="84" y2="67.0" stroke="var(--fig-ink)" stroke-width="0.6"/><text x="84" y="76" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">2</text><line x1="116" y1="61.0" x2="116" y2="67.0" stroke="var(--fig-ink)" stroke-width="0.6"/><text x="116" y="76" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">3</text><line x1="148" y1="61.0" x2="148" y2="67.0" stroke="var(--fig-ink)" stroke-width="0.6"/><text x="148" y="76" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">4</text><line x1="180" y1="61.0" x2="180" y2="67.0" stroke="var(--fig-ink)" stroke-width="0.6"/><text x="180" y="76" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">5</text><line x1="212" y1="61.0" x2="212" y2="67.0" stroke="var(--fig-ink)" stroke-width="0.6"/><text x="212" y="76" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">6</text><line x1="20" y1="22" x2="20" y2="28" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="116" y1="22" x2="116" y2="28" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="20" y1="22" x2="116" y2="22" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><text x="68.0" y="18" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">[:3]</text><line x1="116" y1="92" x2="116" y2="86" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="212" y1="92" x2="212" y2="86" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="116" y1="92" x2="212" y2="92" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><text x="164.0" y="104" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">[3:]</text></svg>
   <p class="caption">Slice indices sit between cells; [:3] and [3:] partition the sequence at index 3, never overlapping or losing an item.</p>
   <p class="score score-high">9.0 · ruler with bracket overlay</p>
 </div>
 <div class="card">
   <p class="eyebrow">Collections · 36</p>
   <h3>Comprehensions</h3>
-  <svg viewBox="-14 -14 308 104" width="493" height="166" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="280" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="140.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">[x*2 for x in xs if x &gt; 0]</text><rect x="0" y="30" width="280" height="14" fill="none" stroke="#521000" stroke-width="0.5" opacity="0.4"/><text x="140.0" y="41.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">out = []</text><rect x="0" y="44" width="280" height="14" fill="none" stroke="#521000" stroke-width="0.5" opacity="0.4"/><text x="140.0" y="55.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">for x in xs:</text><rect x="0" y="58" width="280" height="14" fill="none" stroke="#521000" stroke-width="0.5" opacity="0.4"/><text x="140.0" y="69.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">    if x &gt; 0: out.append(x*2)</text></svg>
+  <svg viewBox="-14 -14 308 104" width="493" height="166" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="280" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="140.0" y="15.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="156" lengthAdjust="spacing">[x*2 for x in xs if x &gt; 0]</text><rect x="0" y="30" width="280" height="14" fill="none" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><text x="140.0" y="41.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="48" lengthAdjust="spacing">out = []</text><rect x="0" y="44" width="280" height="14" fill="none" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><text x="140.0" y="55.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="72" lengthAdjust="spacing">for x in xs:</text><rect x="0" y="58" width="280" height="14" fill="none" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><text x="140.0" y="69.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="174" lengthAdjust="spacing">    if x &gt; 0: out.append(x*2)</text></svg>
   <p class="caption">A comprehension is a compact spelling of the equivalent for-loop with append, made into one expression.</p>
   <p class="score score-high">9.0 · comprehension over equivalent for-loop</p>
 </div>
 <div class="card">
   <p class="eyebrow">Collections · 37</p>
   <h3>Comprehension Patterns</h3>
-  <svg viewBox="-14 -14 308 104" width="493" height="166" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="280" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="140.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">[x*2 for x in xs if x &gt; 0]</text><rect x="0" y="30" width="280" height="14" fill="none" stroke="#521000" stroke-width="0.5" opacity="0.4"/><text x="140.0" y="41.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">out = []</text><rect x="0" y="44" width="280" height="14" fill="none" stroke="#521000" stroke-width="0.5" opacity="0.4"/><text x="140.0" y="55.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">for x in xs:</text><rect x="0" y="58" width="280" height="14" fill="none" stroke="#521000" stroke-width="0.5" opacity="0.4"/><text x="140.0" y="69.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">    if x &gt; 0: out.append(x*2)</text></svg>
+  <svg viewBox="-14 -14 308 104" width="493" height="166" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="280" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="140.0" y="15.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="156" lengthAdjust="spacing">[x*2 for x in xs if x &gt; 0]</text><rect x="0" y="30" width="280" height="14" fill="none" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><text x="140.0" y="41.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="48" lengthAdjust="spacing">out = []</text><rect x="0" y="44" width="280" height="14" fill="none" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><text x="140.0" y="55.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="72" lengthAdjust="spacing">for x in xs:</text><rect x="0" y="58" width="280" height="14" fill="none" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><text x="140.0" y="69.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="174" lengthAdjust="spacing">    if x &gt; 0: out.append(x*2)</text></svg>
   <p class="caption">Nested clauses compose left to right; the comprehension is still equivalent to a for-loop with append.</p>
   <p class="score score-high">9.0 · nested clauses compose</p>
 </div>
 <div class="card">
   <p class="eyebrow">Collections · 38</p>
   <h3>Sorting</h3>
-  <svg viewBox="-14 -14 298 128" width="477" height="205" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="4" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">INPUT</text><text x="180" y="4" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">STABLE SORT BY KEY</text><rect x="0" y="12" width="80" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="40.0" y="26.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">2 · Ada</text><rect x="180" y="12" width="80" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="220.0" y="26.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">1 · Bo</text><rect x="0" y="34" width="80" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="40.0" y="48.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">1 · Bo</text><rect x="180" y="34" width="80" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="220.0" y="48.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">1 · Cy</text><rect x="0" y="56" width="80" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="40.0" y="70.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">2 · Eve</text><rect x="180" y="56" width="80" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="220.0" y="70.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">2 · Ada</text><rect x="0" y="78" width="80" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="40.0" y="92.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">1 · Cy</text><rect x="180" y="78" width="80" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="220.0" y="92.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">2 · Eve</text><line x1="80" y1="44" x2="180" y2="22" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="80" y1="88" x2="180" y2="44" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="80" y1="22" x2="180" y2="66" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="80" y1="66" x2="180" y2="88" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/></svg>
+  <svg viewBox="-14 -14 298 128" width="477" height="205" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="4" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">INPUT</text><text x="180" y="4" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">STABLE SORT BY KEY</text><rect x="0" y="12" width="80" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="40.0" y="26.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">2 · Ada</text><rect x="180" y="12" width="80" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="220.0" y="26.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="36" lengthAdjust="spacing">1 · Bo</text><rect x="0" y="34" width="80" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="40.0" y="48.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="36" lengthAdjust="spacing">1 · Bo</text><rect x="180" y="34" width="80" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="220.0" y="48.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="36" lengthAdjust="spacing">1 · Cy</text><rect x="0" y="56" width="80" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="40.0" y="70.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">2 · Eve</text><rect x="180" y="56" width="80" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="220.0" y="70.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">2 · Ada</text><rect x="0" y="78" width="80" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="40.0" y="92.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="36" lengthAdjust="spacing">1 · Cy</text><rect x="180" y="78" width="80" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="220.0" y="92.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">2 · Eve</text><line x1="80" y1="44" x2="180" y2="22" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="80" y1="88" x2="180" y2="44" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="80" y1="22" x2="180" y2="66" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="80" y1="66" x2="180" y2="88" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/></svg>
   <p class="caption">Python's sort is stable: items with equal keys keep their original order, so chained sorts compose predictably.</p>
   <p class="score score-high">9.0 · stability ribbons preserved across keys</p>
 </div>
 <div class="card">
   <p class="eyebrow">Collections · 39</p>
   <h3>Collections Module</h3>
-  <svg viewBox="-14 -14 312 120" width="499" height="192" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="110" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="55.0" y="14.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">deque</text><rect x="112" y="0" width="170" height="20" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="197.0" y="14.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">fast appends both ends</text><rect x="0" y="22" width="110" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="55.0" y="36.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">Counter</text><rect x="112" y="22" width="170" height="20" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="197.0" y="36.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">key → count</text><rect x="0" y="44" width="110" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="55.0" y="58.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">defaultdict</text><rect x="112" y="44" width="170" height="20" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="197.0" y="58.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">missing key default</text><rect x="0" y="66" width="110" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="55.0" y="80.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">namedtuple</text><rect x="112" y="66" width="170" height="20" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="197.0" y="80.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">tuple with names</text></svg>
+  <svg viewBox="-14 -14 312 120" width="499" height="192" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="110" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="55.0" y="14.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="30" lengthAdjust="spacing">deque</text><rect x="112" y="0" width="170" height="20" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="197.0" y="14.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="132" lengthAdjust="spacing">fast appends both ends</text><rect x="0" y="22" width="110" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="55.0" y="36.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">Counter</text><rect x="112" y="22" width="170" height="20" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="197.0" y="36.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="66" lengthAdjust="spacing">key → count</text><rect x="0" y="44" width="110" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="55.0" y="58.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="66" lengthAdjust="spacing">defaultdict</text><rect x="112" y="44" width="170" height="20" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="197.0" y="58.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="114" lengthAdjust="spacing">missing key default</text><rect x="0" y="66" width="110" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="55.0" y="80.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="60" lengthAdjust="spacing">namedtuple</text><rect x="112" y="66" width="170" height="20" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="197.0" y="80.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="96" lengthAdjust="spacing">tuple with names</text></svg>
   <p class="caption">Four specialised containers for shapes the built-in types don't cover well: deque, Counter, defaultdict, namedtuple.</p>
-  <p class="score score-high">9.0 · deque / Counter / defaultdict / namedtuple</p>
+  <p class="score score-mid">8.5 · deque / Counter / defaultdict / namedtuple; a catalogue, kept until the page is split</p>
 </div>
 <div class="card">
   <p class="eyebrow">Collections · 40</p>
   <h3>Copying Collections</h3>
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+  <svg viewBox="-14 -14 248 203" width="397" height="325" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="12" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">BEFORE</text><rect x="0" y="18" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="34.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">first</text><rect x="0" y="48" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="64.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">second</text><line x1="60" y1="30" x2="80.03839178306819" y2="42.331318020349656" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,46 78.57091899120806,44.71596130712238 81.50586457492832,39.946674733576934" fill="var(--fig-ink)"/><line x1="60" y1="60" x2="79.83670230054477" y2="49.31869876124512" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,46 81.16418180504282,51.784017841027215 78.50922279604673,46.85337968146303" fill="var(--fig-ink)"/><rect x="88" y="32" width="88" height="28" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="132.0" y="50.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="60" lengthAdjust="spacing">["python"]</text><text x="0" y="102" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">AFTER APPEND</text><rect x="0" y="108" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="124.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">first</text><rect x="0" y="138" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="154.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">second</text><line x1="60" y1="120" x2="80.03839178306819" y2="132.33131802034967" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,136 78.57091899120806,134.7159613071224 81.50586457492832,129.94667473357694" fill="var(--fig-ink)"/><line x1="60" y1="150" x2="79.83670230054477" y2="139.31869876124512" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,136 81.16418180504282,141.7840178410272 78.50922279604673,136.85337968146303" fill="var(--fig-ink)"/><rect x="88" y="122" width="130" height="28" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="153.0" y="140.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="120" lengthAdjust="spacing">["python","workers"]</text></svg>
   <p class="caption">Without copy() two names share the same object; mutating through one is visible through the other.</p>
   <p class="score score-high">9.5 · same picture as mutability, perfect match</p>
 </div>
 <div class="card">
   <p class="eyebrow">Functions · 41</p>
   <h3>Functions</h3>
-  <svg viewBox="-14 -14 362 96" width="579" height="154" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><line x1="0" y1="36" x2="23.0" y2="36.0" stroke="#521000" stroke-width="1.0"/><polygon points="30,36 23.0,38.8 23.0,33.2" fill="#521000"/><text x="15" y="28" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">name</text><rect x="32" y="18" width="150" height="44" fill="none" stroke="#521000" stroke-width="1.0"/><text x="38" y="15" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">DEF GREET(NAME):</text><text x="107" y="44" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">"Hello, " + name</text><line x1="182" y1="36" x2="205.0" y2="36.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="212,36 205.0,38.8 205.0,33.2" fill="#FF4801"/><rect x="214" y="24" width="120" height="24" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="274.0" y="40.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">"Hello, Ada"</text></svg>
+  <svg viewBox="-14 -14 362 96" width="579" height="154" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><line x1="0" y1="36" x2="23.0" y2="36.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="30,36 23.0,38.8 23.0,33.2" fill="var(--fig-ink)"/><text x="15" y="28" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">name</text><rect x="32" y="18" width="150" height="44" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="38" y="15" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">DEF GREET(NAME):</text><text x="107" y="44" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="96" lengthAdjust="spacing">"Hello, " + name</text><line x1="182" y1="36" x2="205.0" y2="36.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="212,36 205.0,38.8 205.0,33.2" fill="var(--fig-accent)"/><rect x="214" y="24" width="120" height="24" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="274.0" y="40.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="72" lengthAdjust="spacing">"Hello, Ada"</text></svg>
   <p class="caption">A function takes inputs, evaluates a body, and returns a value: `greet('Ada')` produces `'Hello, Ada'`.</p>
   <p class="score score-high">9.0 · specific call: greet('Ada') → 'Hello, Ada'</p>
 </div>
 <div class="card">
   <p class="eyebrow">Functions · 42</p>
   <h3>Keyword-only Arguments</h3>
-  <svg viewBox="-14 -14 228 84" width="365" height="134" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="18" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="start">def f(a, b, *, c, d): …</text><line x1="75.0" y1="22" x2="75.0" y2="38" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><text x="33" y="50" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">positional or kw</text><text x="120" y="50" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">keyword only</text></svg>
+  <svg viewBox="-14 -14 228 84" width="365" height="134" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="18" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="start" textLength="138" lengthAdjust="spacing">def f(a, b, *, c, d): …</text><line x1="75.0" y1="22" x2="75.0" y2="38" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><text x="33" y="50" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">positional or kw</text><text x="120" y="50" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">keyword only</text></svg>
   <p class="caption">A bare `*` divides positional or keyword arguments from keyword-only ones; callers must pass `c` and `d` by name.</p>
   <p class="score score-high">9.0 · signature with explicit `*` separator</p>
 </div>
 <div class="card">
   <p class="eyebrow">Functions · 43</p>
   <h3>Positional-only Parameters</h3>
-  <svg viewBox="-14 -14 228 84" width="365" height="134" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="18" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="start">def f(a, b, /, c, d): …</text><line x1="75.0" y1="22" x2="75.0" y2="38" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><text x="33" y="50" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">positional only</text><text x="120" y="50" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">positional or kw</text></svg>
+  <svg viewBox="-14 -14 228 84" width="365" height="134" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="18" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="start" textLength="138" lengthAdjust="spacing">def f(a, b, /, c, d): …</text><line x1="75.0" y1="22" x2="75.0" y2="38" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><text x="33" y="50" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">positional only</text><text x="120" y="50" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">positional or kw</text></svg>
   <p class="caption">A bare `/` divides positional-only arguments from positional-or-keyword ones; callers cannot name `a` or `b`.</p>
   <p class="score score-high">9.0 · signature with explicit `/` separator</p>
 </div>
 <div class="card">
   <p class="eyebrow">Functions · 43</p>
   <h3>Positional-only Parameters</h3>
-  <svg viewBox="-14 -14 228 84" width="365" height="134" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="18" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="start">def f(a, b, *, c, d): …</text><line x1="75.0" y1="22" x2="75.0" y2="38" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><text x="33" y="50" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">positional or kw</text><text x="120" y="50" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">keyword only</text></svg>
+  <svg viewBox="-14 -14 228 84" width="365" height="134" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="18" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="start" textLength="138" lengthAdjust="spacing">def f(a, b, *, c, d): …</text><line x1="75.0" y1="22" x2="75.0" y2="38" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><text x="33" y="50" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">positional or kw</text><text x="120" y="50" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">keyword only</text></svg>
   <p class="caption">In the same signature, the bare `*` works the other way: parameters after it, such as `clamp`, must be named at the call site.</p>
   <p class="score score-high">9.0 · signature with explicit `/` separator</p>
 </div>
 <div class="card">
   <p class="eyebrow">Functions · 44</p>
   <h3>Args and Kwargs</h3>
-  <svg viewBox="-14 -14 308 96" width="493" height="154" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="20" y="22" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="start">def f(*args, **kwargs): …</text><line x1="71.0" y1="26" x2="71.0" y2="44" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="122.0" y1="26" x2="122.0" y2="44" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><text x="71.0" y="56" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">→ tuple</text><text x="122.0" y="56" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">→ dict</text></svg>
+  <svg viewBox="-14 -14 308 96" width="493" height="154" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="20" y="22" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="start" textLength="150" lengthAdjust="spacing">def f(*args, **kwargs): …</text><line x1="71.0" y1="26" x2="71.0" y2="44" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="122.0" y1="26" x2="122.0" y2="44" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><text x="71.0" y="56" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">→ tuple</text><text x="122.0" y="56" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">→ dict</text></svg>
   <p class="caption">*args captures the extra positionals as a tuple; **kwargs captures the extra keywords as a dict.</p>
   <p class="score score-high">9.0 · *args tuple, **kwargs dict regions</p>
 </div>
 <div class="card">
   <p class="eyebrow">Functions · 45</p>
   <h3>Multiple Return Values</h3>
-  <svg viewBox="-14 -14 208 138" width="333" height="221" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="180" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="90.0" y="16.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">def f(): return a, b</text><line x1="90" y1="26" x2="90.0" y2="37.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="90,44 87.2,37.0 92.8,37.0" fill="#FF4801"/><rect x="58" y="44" width="64" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="90.0" y="59.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">(a, b)</text><line x1="90" y1="68" x2="90.0" y2="79.0" stroke="#521000" stroke-width="1.0"/><polygon points="90,86 87.2,79.0 92.8,79.0" fill="#521000"/><rect x="50" y="86" width="80" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="90.0" y="101.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">x, y</text></svg>
+  <svg viewBox="-14 -14 208 148" width="333" height="237" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="180" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="90.0" y="16.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="120" lengthAdjust="spacing">def f(): return a, b</text><line x1="90" y1="26" x2="90.0" y2="41.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="90,48 87.2,41.0 92.8,41.0" fill="var(--fig-accent)"/><rect x="58" y="48" width="64" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="90.0" y="63.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="36" lengthAdjust="spacing">(a, b)</text><line x1="90" y1="72" x2="90.0" y2="87.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="90,94 87.2,87.0 92.8,87.0" fill="var(--fig-ink)"/><rect x="50" y="94" width="80" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="90.0" y="109.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">x, y</text></svg>
   <p class="caption">A function returning multiple values really returns one tuple; the caller unpacks it into named bindings.</p>
   <p class="score score-high">9.0 · function returns tuple; caller unpacks</p>
 </div>
 <div class="card">
   <p class="eyebrow">Functions · 46</p>
   <h3>Closures</h3>
-  <svg viewBox="-14 -14 268 148" width="429" height="237" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="16" width="240" height="96" fill="none" stroke="#521000" stroke-width="1.0"/><text x="6" y="13" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">MAKE_MULTIPLIER</text><text x="16" y="32" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">CELL</text><rect x="16" y="38" width="84" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="58.0" y="53.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">factor=2</text><rect x="112" y="38" width="122" height="60" fill="none" stroke="#521000" stroke-width="1.0"/><text x="118" y="35" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">MULTIPLY</text><text x="173" y="76" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">uses cell</text><line x1="128" y1="76" x2="107.5483679237322" y2="60.267975325947845" stroke="#FF4801" stroke-width="1.4"/><polygon points="102,56 109.25555805411133,58.04862815645497 105.84117779335307,62.48732249544072" fill="#FF4801"/></svg>
-  <p class="caption">The inner function keeps a reference into the outer scope's cell, so the captured factor survives the outer return.</p>
-  <p class="score score-high">9.0 · captured cell reference</p>
+  <svg viewBox="-14 -14 308 144" width="493" height="230" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="14" width="112" height="36" fill="none" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><text x="6" y="11" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">MAKE_MULTIPLIER(2) · RETURNED</text><text x="34.0" y="36.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">factor</text><rect x="60" y="22" width="44" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="82.0" y="36.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">2</text><rect x="0" y="80" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="96.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">double</text><line x1="62" y1="92" x2="141.0" y2="92.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="148,92 141.0,94.8 141.0,89.2" fill="var(--fig-ink)"/><rect x="150" y="62" width="130" height="48" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="156" y="59" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">FUNCTION · MULTIPLY</text><text x="215" y="84" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="84" lengthAdjust="spacing">value * factor</text><text x="114" y="60" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="end">__closure__</text><line x1="150" y1="74" x2="116.69639326778389" y2="37.1907504538664" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="112,32 118.77269344933045,35.31219314675285 114.62009308623733,39.06930776097995" fill="var(--fig-accent)"/></svg>
+  <p class="caption">make_multiplier(2) has returned, but the function object double names still points into that frame's cell, so the captured factor outlives the call.</p>
+  <p class="score score-high">9.5 · environment diagram: ghosted returned frame, heap function object, one live __closure__ reference; 1.5/1/0.75/1/1 · 1/1/1 · 1/0.5</p>
 </div>
 <div class="card">
   <p class="eyebrow">Functions · 47</p>
   <h3>Partial Functions</h3>
-  <svg viewBox="-14 -14 362 64" width="579" height="102" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="12" width="100" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="50.0" y="28.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">f(a, b, c)</text><line x1="100" y1="24" x2="123.0" y2="24.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="130,24 123.0,26.8 123.0,21.2" fill="#FF4801"/><rect x="132" y="0" width="100" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="182.0" y="16.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">partial(f, 1)</text><line x1="232" y1="24" x2="255.0" y2="24.0" stroke="#521000" stroke-width="1.0"/><polygon points="262,24 255.0,26.8 255.0,21.2" fill="#521000"/><rect x="264" y="12" width="70" height="24" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="299.0" y="28.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">g(b, c)</text></svg>
+  <svg viewBox="-14 -14 362 64" width="579" height="102" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="12" width="100" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="50.0" y="28.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="60" lengthAdjust="spacing">f(a, b, c)</text><line x1="100" y1="24" x2="123.0" y2="24.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="130,24 123.0,26.8 123.0,21.2" fill="var(--fig-accent)"/><rect x="132" y="0" width="100" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="182.0" y="16.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="78" lengthAdjust="spacing">partial(f, 1)</text><line x1="232" y1="24" x2="255.0" y2="24.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="262,24 255.0,26.8 255.0,21.2" fill="var(--fig-ink)"/><rect x="264" y="12" width="70" height="24" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="299.0" y="28.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">g(b, c)</text></svg>
   <p class="caption">`functools.partial(f, 1)` pre-fills `a=1`, returning a thinner callable `g(b, c)` that only needs the rest.</p>
   <p class="score score-high">9.0 · f → partial(f, 1) → g</p>
 </div>
 <div class="card">
   <p class="eyebrow">Functions · 48</p>
   <h3>Global and Nonlocal</h3>
-  <svg viewBox="-14 -14 244 144" width="390" height="230" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="8" y="6" width="200" height="100" fill="none" stroke="#521000" stroke-width="1.0"/><text x="14" y="3" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">B · BUILT-IN</text><rect x="28" y="22" width="160" height="76" fill="none" stroke="#521000" stroke-width="1.0"/><text x="34" y="19" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">G · GLOBAL</text><rect x="48" y="38" width="120" height="52" fill="none" stroke="#521000" stroke-width="1.0"/><text x="54" y="35" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">E · ENCLOSING</text><rect x="68" y="54" width="80" height="28" fill="none" stroke="#521000" stroke-width="1.0"/><text x="74" y="51" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">L · LOCAL</text><circle cx="108" cy="68" r="2.5" fill="#FF4801"/><line x1="108" y1="78" x2="108" y2="100" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/></svg>
+  <svg viewBox="-14 -14 244 144" width="390" height="230" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="8" y="6" width="200" height="100" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="14" y="3" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">B · BUILT-IN</text><rect x="28" y="22" width="160" height="76" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="34" y="19" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">G · GLOBAL</text><rect x="48" y="38" width="120" height="52" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="54" y="35" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">E · ENCLOSING</text><rect x="68" y="54" width="80" height="28" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="74" y="51" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">L · LOCAL</text><circle cx="108" cy="68" r="2.5" fill="var(--fig-accent)"/><line x1="108" y1="78" x2="108" y2="100" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/></svg>
   <p class="caption">Name lookup walks LEGB — local, enclosing, global, built-in — outward, returning the first binding it finds.</p>
   <p class="score score-high">9.0 · LEGB nested rings</p>
 </div>
 <div class="card">
   <p class="eyebrow">Functions · 49</p>
   <h3>Recursion</h3>
-  <svg viewBox="-14 -14 228 128" width="365" height="205" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="180" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="90.0" y="14.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">factorial(3)</text><rect x="0" y="22" width="180" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="90.0" y="36.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">factorial(2)</text><rect x="0" y="44" width="180" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="90.0" y="58.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">factorial(1)</text><rect x="0" y="66" width="180" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="90.0" y="80.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">factorial(0) ← base</text><line x1="192" y1="90" x2="192" y2="18" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="192" y1="30" x2="192.0" y2="25.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="192,18 194.8,25.0 189.2,25.0" fill="#FF4801"/></svg>
-  <p class="caption">Each call pushes a new frame with the same name and a smaller argument; the base case unwinds back up the stack.</p>
-  <p class="score score-high">9.0 · stacked frames with same name, different argument</p>
+  <svg viewBox="-14 -14 320 108" width="512" height="173" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="104" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="52.0" y="15.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="66" lengthAdjust="spacing">total(tree)</text><rect x="104" y="0" width="92" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="150.0" y="15.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">value 1</text><text x="224" y="15" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="start">returns 10</text><rect x="0" y="26" width="104" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="52.0" y="41.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="72" lengthAdjust="spacing">total(child)</text><rect x="104" y="26" width="92" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="150.0" y="41.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">value 3</text><text x="224" y="41" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="start">returns 7</text><rect x="0" y="52" width="104" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="52.0" y="67.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="72" lengthAdjust="spacing">total(child)</text><rect x="104" y="52" width="92" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="150.0" y="67.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="84" lengthAdjust="spacing">value 4 · leaf</text><text x="224" y="67" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="start">returns 4</text><line x1="208" y1="74" x2="208.0" y2="19.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="208,12 210.8,19.0 205.2,19.0" fill="var(--fig-accent)"/></svg>
+  <p class="caption">At the leaf with value 4, three frames of total are stacked, each waiting on the one below; unwinding returns 4, then 3 + 4 = 7, then 1 + 2 + 7 = 10.</p>
+  <p class="score score-high">9.0 · the example's own tree at its deepest frame, return values unwinding; earns-place 0.75, the cell's output already gives 10; 1.5/0.75/1/1/1 · 1/1/1 · 1/0.5</p>
 </div>
 <div class="card">
   <p class="eyebrow">Functions · 50</p>
   <h3>Lambdas</h3>
-  <svg viewBox="-14 -14 198 104" width="317" height="166" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="170" height="28" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="85.0" y="18.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">lambda x: x + 1</text><line x1="40" y1="28" x2="40" y2="50" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="120" y1="28" x2="120" y2="50" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><text x="40" y="62" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">params</text><text x="120" y="62" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">expression</text></svg>
+  <svg viewBox="-14 -14 198 104" width="317" height="166" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="170" height="28" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="85.0" y="18.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="90" lengthAdjust="spacing">lambda x: x + 1</text><line x1="40" y1="28" x2="40" y2="50" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="120" y1="28" x2="120" y2="50" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><text x="40" y="62" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">params</text><text x="120" y="62" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">expression</text></svg>
   <p class="caption">A lambda is a function literal: parameters before the colon, a single expression after, no statement body.</p>
   <p class="score score-high">9.0 · function literal: params / expression</p>
 </div>
 <div class="card">
   <p class="eyebrow">Iteration · 51</p>
   <h3>Generators</h3>
-  <svg viewBox="-14 -14 288 78" width="461" height="125" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="8" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">PAUSED BETWEEN YIELDS · RESUMED BY NEXT()</text><rect x="0" y="16" width="64" height="30" fill="rgba(82, 16, 0, 0.05)" stroke="none"/><rect x="136" y="16" width="72" height="30" fill="rgba(82, 16, 0, 0.05)" stroke="none"/><rect x="0" y="16" width="260" height="30" fill="none" stroke="#521000" stroke-width="1.0"/><line x1="64" y1="16" x2="64" y2="46" stroke="#FF4801" stroke-width="1.4"/><line x1="136" y1="16" x2="136" y2="46" stroke="#FF4801" stroke-width="1.4"/><line x1="208" y1="16" x2="208" y2="46" stroke="#FF4801" stroke-width="1.4"/><text x="32" y="36" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">…</text><text x="100" y="36" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">yield</text><text x="172" y="36" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">…</text><text x="244" y="36" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">yield</text></svg>
-  <p class="caption">A generator's body is a timeline cut by yield gates: each next() advances to the next gate; locals survive the pause.</p>
-  <p class="score score-high">9.0 · ribbon cut by yield gates</p>
+  <svg viewBox="-14 -14 346 100" width="554" height="160" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="60" y="8" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">yield</text><text x="126" y="8" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">yield</text><text x="192" y="8" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">yield</text><rect x="0" y="14" width="60" height="22" fill="var(--fig-soft)" stroke="none"/><rect x="0" y="14" width="224" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><line x1="60" y1="14" x2="60" y2="36" stroke="var(--fig-accent)" stroke-width="1.4"/><line x1="126" y1="14" x2="126" y2="36" stroke="var(--fig-accent)" stroke-width="1.4"/><line x1="192" y1="14" x2="192" y2="36" stroke="var(--fig-accent)" stroke-width="1.4"/><text x="236" y="29" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="start">next() → 3 · n=3</text><rect x="0" y="48" width="126" height="22" fill="var(--fig-soft)" stroke="none"/><rect x="0" y="48" width="224" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><line x1="60" y1="48" x2="60" y2="70" stroke="var(--fig-accent)" stroke-width="1.4"/><line x1="126" y1="48" x2="126" y2="70" stroke="var(--fig-accent)" stroke-width="1.4"/><line x1="192" y1="48" x2="192" y2="70" stroke="var(--fig-accent)" stroke-width="1.4"/><text x="236" y="63" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="start">next() → 2 · n=2</text></svg>
+  <p class="caption">The cell's two next() calls on countdown(3), one timeline each: every call resumes the body to the next yield gate, and the local n survives the pause.</p>
+  <p class="score score-high">9.5 · the cell's two next() ribbons on countdown(3), local n shown surviving; earns-place 0.75, the prose says the same; 1.5/0.75/1/1/1 · 1/1/1 · 1/0.5</p>
 </div>
 <div class="card">
   <p class="eyebrow">Iteration · 52</p>
   <h3>Yield From</h3>
-  <svg viewBox="-14 -14 268 112" width="429" height="179" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="4" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">OUTER</text><rect x="0" y="14" width="240" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><line x1="100" y1="14" x2="100" y2="34" stroke="#FF4801" stroke-width="1.4"/><line x1="180" y1="14" x2="180" y2="34" stroke="#FF4801" stroke-width="1.4"/><text x="140" y="28" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">yield from inner</text><text x="100" y="46" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">INNER</text><rect x="100" y="56" width="80" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><line x1="124" y1="56" x2="124" y2="80" stroke="#FF4801" stroke-width="1.4"/><line x1="152" y1="56" x2="152" y2="80" stroke="#FF4801" stroke-width="1.4"/><line x1="140" y1="56" x2="140" y2="34" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/></svg>
+  <svg viewBox="-14 -14 268 112" width="429" height="179" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="4" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">OUTER</text><rect x="0" y="14" width="240" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><line x1="100" y1="14" x2="100" y2="34" stroke="var(--fig-accent)" stroke-width="1.4"/><line x1="180" y1="14" x2="180" y2="34" stroke="var(--fig-accent)" stroke-width="1.4"/><text x="140" y="28" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="96" lengthAdjust="spacing">yield from inner</text><text x="100" y="46" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">INNER</text><rect x="100" y="56" width="80" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><line x1="124" y1="56" x2="124" y2="80" stroke="var(--fig-accent)" stroke-width="1.4"/><line x1="152" y1="56" x2="152" y2="80" stroke="var(--fig-accent)" stroke-width="1.4"/><line x1="140" y1="56" x2="140" y2="34" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/></svg>
   <p class="caption">`yield from inner` delegates iteration to an inner generator; its yields surface here unchanged.</p>
   <p class="score score-high">9.0 · stitched ribbons; delegation</p>
 </div>
 <div class="card">
   <p class="eyebrow">Iteration · 53</p>
   <h3>Generator Expressions</h3>
-  <svg viewBox="-14 -14 328 84" width="525" height="134" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="26" width="78" height="24" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="4" y="21" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">SOURCE</text><text x="39.0" y="42.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">[a,b,c]</text><line x1="78" y1="38" x2="102" y2="38" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><rect x="104" y="26" width="68" height="24" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="108" y="21" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">FILTER</text><text x="138.0" y="42.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">x&gt;0</text><line x1="172" y1="38" x2="196" y2="38" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><rect x="198" y="26" width="64" height="24" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="202" y="21" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">MAP</text><text x="230.0" y="42.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">x*2</text><line x1="262" y1="38" x2="287.0" y2="38.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="294,38 287.0,40.8 287.0,35.2" fill="#FF4801"/><text x="278" y="30" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">next()</text></svg>
+  <svg viewBox="-14 -14 328 84" width="525" height="134" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="26" width="78" height="24" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="4" y="21" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">SOURCE</text><text x="39.0" y="42.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">[a,b,c]</text><line x1="78" y1="38" x2="102" y2="38" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><rect x="104" y="26" width="68" height="24" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="108" y="21" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">FILTER</text><text x="138.0" y="42.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="18" lengthAdjust="spacing">x&gt;0</text><line x1="172" y1="38" x2="196" y2="38" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><rect x="198" y="26" width="64" height="24" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="202" y="21" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">MAP</text><text x="230.0" y="42.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="18" lengthAdjust="spacing">x*2</text><line x1="262" y1="38" x2="287.0" y2="38.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="294,38 287.0,40.8 287.0,35.2" fill="var(--fig-accent)"/><text x="278" y="30" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">next()</text></svg>
   <p class="caption">A generator expression composes filter and map lazily; values flow only when next() pulls them.</p>
   <p class="score score-high">9.0 · lazy filter→map pipeline</p>
 </div>
 <div class="card">
   <p class="eyebrow">Iteration · 54</p>
   <h3>Itertools</h3>
-  <svg viewBox="-14 -14 274 110" width="438" height="176" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="14" width="70" height="24" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="4" y="9" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">ITER A</text><text x="35.0" y="30.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">1 · 2</text><rect x="0" y="52" width="70" height="24" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="4" y="47" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">ITER B</text><text x="35.0" y="68.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">3 · 4</text><line x1="70" y1="26" x2="93.3592169136464" y2="33.78640563788213" stroke="#521000" stroke-width="1.0"/><polygon points="100,36 92.47377916879925,36.44271887242357 94.24465465849356,31.130092403340694" fill="#521000"/><line x1="70" y1="64" x2="93.3592169136464" y2="56.21359436211787" stroke="#521000" stroke-width="1.0"/><polygon points="100,54 94.24465465849356,58.8699075966593 92.47377916879925,53.55728112757643" fill="#521000"/><rect x="102" y="30" width="140" height="28" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="106" y="25" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">CHAIN</text><text x="172.0" y="48.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">1 · 2 · 3 · 4</text></svg>
+  <svg viewBox="-14 -14 274 110" width="438" height="176" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="14" width="70" height="24" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="4" y="9" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">ITER A</text><text x="35.0" y="30.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="30" lengthAdjust="spacing">1 · 2</text><rect x="0" y="52" width="70" height="24" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="4" y="47" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">ITER B</text><text x="35.0" y="68.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="30" lengthAdjust="spacing">3 · 4</text><line x1="70" y1="26" x2="93.3592169136464" y2="33.78640563788213" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="100,36 92.47377916879925,36.44271887242357 94.24465465849356,31.130092403340694" fill="var(--fig-ink)"/><line x1="70" y1="64" x2="93.3592169136464" y2="56.21359436211787" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="100,54 94.24465465849356,58.8699075966593 92.47377916879925,53.55728112757643" fill="var(--fig-ink)"/><rect x="102" y="30" width="140" height="28" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="106" y="25" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">CHAIN</text><text x="172.0" y="48.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="78" lengthAdjust="spacing">1 · 2 · 3 · 4</text></svg>
   <p class="caption">chain stitches two iterables into one stream without materialising either: values arrive lazily.</p>
   <p class="score score-high">9.0 · chain joins two iterables into one stream</p>
 </div>
 <div class="card">
   <p class="eyebrow">Functions · 55</p>
   <h3>Decorators</h3>
-  <svg viewBox="-14 -14 260 138" width="416" height="221" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="12" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">BEFORE</text><rect x="0" y="22.0" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="38.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">f</text><rect x="80" y="18" width="50" height="32" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="84" y="13" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">FN</text><text x="105.0" y="38.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">f₀</text><line x1="62" y1="34.0" x2="71.0" y2="34.0" stroke="#521000" stroke-width="1.0"/><polygon points="78,34.0 71.0,36.8 71.0,31.2" fill="#521000"/><text x="0" y="70" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">AFTER @DEC</text><rect x="0" y="78" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="94.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">f</text><line x1="60" y1="90" x2="89.0" y2="90.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="96,90 89.0,92.8 89.0,87.2" fill="#FF4801"/><rect x="98" y="76" width="80" height="28" fill="none" stroke="#521000" stroke-width="1.0"/><text x="138.0" y="94.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">wrapper</text><rect x="186" y="78" width="44" height="24" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="208.0" y="94.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">f₀</text><line x1="178" y1="90" x2="186" y2="90" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/></svg>
+  <svg viewBox="-14 -14 260 138" width="416" height="221" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="12" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">BEFORE</text><rect x="0" y="22.0" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="38.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">f</text><rect x="86" y="18" width="50" height="32" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="90" y="13" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">FN</text><text x="111.0" y="38.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="12" lengthAdjust="spacing">f₀</text><line x1="62" y1="34.0" x2="77.0" y2="34.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="84,34.0 77.0,36.8 77.0,31.2" fill="var(--fig-ink)"/><text x="0" y="70" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">AFTER @DEC</text><rect x="0" y="78" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="94.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">f</text><line x1="60" y1="90" x2="89.0" y2="90.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="96,90 89.0,92.8 89.0,87.2" fill="var(--fig-accent)"/><rect x="98" y="76" width="80" height="28" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="138.0" y="94.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">wrapper</text><rect x="186" y="78" width="44" height="24" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="208.0" y="94.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="12" lengthAdjust="spacing">f₀</text><line x1="178" y1="90" x2="186" y2="90" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/></svg>
   <p class="caption">@dec rebinds the name to wrapper(f₀); the original function survives only in the wrapper's closure cell.</p>
   <p class="score score-high">9.0 · before/after rebinding through cell</p>
 </div>
 <div class="card">
   <p class="eyebrow">Classes · 56</p>
   <h3>Classes</h3>
-  <svg viewBox="-14 -14 302 88" width="483" height="141" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><circle cx="20" cy="28" r="2.5" fill="#521000"/><text x="20" y="54" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">instance</text><line x1="26" y1="28" x2="79.0" y2="28.0" stroke="#521000" stroke-width="1.0"/><polygon points="86,28 79.0,30.8 79.0,25.2" fill="#521000"/><rect x="88" y="10" width="60" height="36" fill="none" stroke="#521000" stroke-width="1.0"/><text x="94" y="7" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">CLASS</text><text x="118" y="32" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">Class</text><line x1="148" y1="28" x2="201.0" y2="28.0" stroke="#521000" stroke-width="1.0"/><polygon points="208,28 201.0,30.8 201.0,25.2" fill="#521000"/><rect x="210" y="10" width="60" height="36" fill="none" stroke="#521000" stroke-width="1.0"/><text x="216" y="7" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">TYPE</text><text x="240.0" y="32" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">type</text></svg>
+  <svg viewBox="-14 -14 302 88" width="483" height="141" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><circle cx="20" cy="28" r="2.5" fill="var(--fig-ink)"/><text x="20" y="54" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">instance</text><line x1="26" y1="28" x2="79.0" y2="28.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,28 79.0,30.8 79.0,25.2" fill="var(--fig-ink)"/><rect x="88" y="10" width="60" height="36" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="94" y="7" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">CLASS</text><text x="118" y="32" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="30" lengthAdjust="spacing">Class</text><line x1="148" y1="28" x2="201.0" y2="28.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="208,28 201.0,30.8 201.0,25.2" fill="var(--fig-ink)"/><rect x="210" y="10" width="60" height="36" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="216" y="7" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">TYPE</text><text x="240.0" y="32" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">type</text></svg>
   <p class="caption">Every Python value sits on the instance → class → type triangle; the metaclass is the type of the class.</p>
   <p class="score score-high">9.0 · instance/class/type triangle</p>
 </div>
 <div class="card">
   <p class="eyebrow">Classes · 57</p>
   <h3>Inheritance and Super</h3>
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+  <svg viewBox="-14 -14 228 180" width="365" height="288" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="80" y="0" width="40" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><text x="100" y="16" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">A</text><line x1="98" y1="22" x2="58" y2="42" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><line x1="102" y1="22" x2="142" y2="42" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><rect x="40" y="42" width="40" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><text x="60" y="58" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">B</text><rect x="120" y="42" width="40" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><text x="140" y="58" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">C</text><line x1="60" y1="64" x2="96" y2="80" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><line x1="140" y1="64" x2="104" y2="80" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><rect x="80" y="80" width="40" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><text x="100" y="96" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">D</text><text x="0" y="118" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">MRO</text><rect x="0" y="124" width="36" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="18.0" y="139.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">D</text><rect x="36" y="124" width="36" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="54.0" y="139.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">B</text><rect x="72" y="124" width="36" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="90.0" y="139.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">C</text><rect x="108" y="124" width="36" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="126.0" y="139.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">A</text><rect x="144" y="124" width="56" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="172.0" y="139.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="36" lengthAdjust="spacing">object</text></svg>
   <p class="caption">Multiple inheritance forms a graph; C3 linearisation flattens it into the MRO Python uses for attribute lookup.</p>
   <p class="score score-high">9.0 · MRO chain with diamond ghost</p>
 </div>
 <div class="card">
   <p class="eyebrow">Classes · 58</p>
   <h3>Classmethods and Staticmethods</h3>
-  <svg viewBox="-14 -14 300 98" width="480" height="157" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="110" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="55.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">@classmethod</text><line x1="110" y1="11" x2="133.0" y2="11.0" stroke="#521000" stroke-width="1.0"/><polygon points="140,11 133.0,13.8 133.0,8.2" fill="#521000"/><rect x="142" y="0" width="130" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="207.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">first arg · Cls</text><rect x="0" y="24" width="110" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="55.0" y="39.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">@staticmethod</text><line x1="110" y1="35" x2="133.0" y2="35.0" stroke="#521000" stroke-width="1.0"/><polygon points="140,35 133.0,37.8 133.0,32.2" fill="#521000"/><rect x="142" y="24" width="130" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="207.0" y="39.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">first arg · (none)</text><rect x="0" y="48" width="110" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="55.0" y="63.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">instance</text><line x1="110" y1="59" x2="133.0" y2="59.0" stroke="#521000" stroke-width="1.0"/><polygon points="140,59 133.0,61.8 133.0,56.2" fill="#521000"/><rect x="142" y="48" width="130" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="207.0" y="63.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">first arg · self</text></svg>
+  <svg viewBox="-14 -14 300 98" width="480" height="157" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="110" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="55.0" y="15.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="72" lengthAdjust="spacing">@classmethod</text><line x1="110" y1="11" x2="133.0" y2="11.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="140,11 133.0,13.8 133.0,8.2" fill="var(--fig-ink)"/><rect x="142" y="0" width="130" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="207.0" y="15.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="90" lengthAdjust="spacing">first arg · Cls</text><rect x="0" y="24" width="110" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="55.0" y="39.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="78" lengthAdjust="spacing">@staticmethod</text><line x1="110" y1="35" x2="133.0" y2="35.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="140,35 133.0,37.8 133.0,32.2" fill="var(--fig-ink)"/><rect x="142" y="24" width="130" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="207.0" y="39.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="108" lengthAdjust="spacing">first arg · (none)</text><rect x="0" y="48" width="110" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="55.0" y="63.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="48" lengthAdjust="spacing">instance</text><line x1="110" y1="59" x2="133.0" y2="59.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="140,59 133.0,61.8 133.0,56.2" fill="var(--fig-ink)"/><rect x="142" y="48" width="130" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="207.0" y="63.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="96" lengthAdjust="spacing">first arg · self</text></svg>
   <p class="caption">Three method kinds, three first-argument conventions: classmethod gets the class, staticmethod gets nothing, instance gets self.</p>
   <p class="score score-high">9.0 · three method kinds, three first-arg conventions</p>
 </div>
 <div class="card">
   <p class="eyebrow">Classes · 59</p>
   <h3>Dataclasses</h3>
-  <svg viewBox="-14 -14 340 104" width="544" height="166" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="12" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">DECLARATION</text><rect x="0" y="18" width="110" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="55.0" y="32.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">name : str</text><rect x="0" y="38" width="110" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="55.0" y="52.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">age : int</text><rect x="0" y="58" width="110" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="55.0" y="72.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">tags : list</text><line x1="110" y1="48" x2="139.0" y2="48.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="146,48 139.0,50.8 139.0,45.2" fill="#FF4801"/><rect x="148" y="32" width="160" height="32" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="228.0" y="52.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">__init__(name, age, tags)</text></svg>
+  <svg viewBox="-14 -14 340 104" width="544" height="166" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="12" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">DECLARATION</text><rect x="0" y="18" width="110" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="55.0" y="32.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="60" lengthAdjust="spacing">name : str</text><rect x="0" y="38" width="110" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="55.0" y="52.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="54" lengthAdjust="spacing">age : int</text><rect x="0" y="58" width="110" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="55.0" y="72.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="66" lengthAdjust="spacing">tags : list</text><line x1="110" y1="48" x2="139.0" y2="48.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="146,48 139.0,50.8 139.0,45.2" fill="var(--fig-accent)"/><rect x="148" y="32" width="160" height="32" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="228.0" y="52.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="150" lengthAdjust="spacing">__init__(name, age, tags)</text></svg>
   <p class="caption">Field declarations become the generated __init__ signature: declaration is the constructor.</p>
   <p class="score score-high">9.0 · fields → generated __init__ signature</p>
 </div>
 <div class="card">
   <p class="eyebrow">Classes · 60</p>
   <h3>Properties</h3>
-  <svg viewBox="-14 -14 260 100" width="416" height="160" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="22" width="70" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="35.0" y="38.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">obj.x</text><line x1="70" y1="22" x2="103.61654946377425" y2="6.872552741301585" stroke="#FF4801" stroke-width="1.4"/><polygon points="110,4 104.76557056029488,9.425932955791883 102.46752836725362,4.319172526811288" fill="#FF4801"/><rect x="112" y="0" width="120" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="172.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">fget / fset</text><line x1="70" y1="46" x2="103.20900249898267" y2="54.30225062474567" stroke="#521000" stroke-width="1.0"/><polygon points="110,56 102.52990274888094,57.0186496251526 103.8881022490844,51.58585162433874" fill="#521000"/><rect x="112" y="50" width="120" height="22" fill="none" stroke="#521000" stroke-width="0.5" opacity="0.4"/><text x="172.0" y="65.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">__dict__</text></svg>
+  <svg viewBox="-14 -14 260 100" width="416" height="160" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="22" width="70" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="35.0" y="38.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="30" lengthAdjust="spacing">obj.x</text><line x1="70" y1="22" x2="103.61654946377425" y2="6.872552741301585" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="110,4 104.76557056029488,9.425932955791883 102.46752836725362,4.319172526811288" fill="var(--fig-accent)"/><rect x="112" y="0" width="120" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="172.0" y="15.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="66" lengthAdjust="spacing">fget / fset</text><line x1="70" y1="46" x2="103.20900249898267" y2="54.30225062474567" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="110,56 102.52990274888094,57.0186496251526 103.8881022490844,51.58585162433874" fill="var(--fig-ink)"/><rect x="112" y="50" width="120" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><text x="172.0" y="65.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="48" lengthAdjust="spacing">__dict__</text></svg>
   <p class="caption">When x is a property, attribute access routes through fget/fset instead of touching __dict__.</p>
   <p class="score score-high">9.0 · obj.x routes through fget instead of __dict__</p>
 </div>
 <div class="card">
   <p class="eyebrow">Data Model · 61</p>
   <h3>Special Methods</h3>
-  <svg viewBox="-14 -14 288 98" width="461" height="157" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="30" width="70" height="28" fill="none" stroke="#521000" stroke-width="1.0"/><text x="35.0" y="48.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">a + b</text><line x1="70" y1="44" x2="109.0" y2="44.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="116,44 109.0,46.8 109.0,41.2" fill="#FF4801"/><text x="93" y="22" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">dispatches</text><rect x="118" y="30" width="140" height="28" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="188.0" y="48.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">a.__add__(b)</text></svg>
+  <svg viewBox="-14 -14 288 98" width="461" height="157" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="30" width="70" height="28" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="35.0" y="48.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="30" lengthAdjust="spacing">a + b</text><line x1="70" y1="44" x2="109.0" y2="44.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="116,44 109.0,46.8 109.0,41.2" fill="var(--fig-accent)"/><text x="93" y="22" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">dispatches</text><rect x="118" y="30" width="140" height="28" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="188.0" y="48.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="72" lengthAdjust="spacing">a.__add__(b)</text></svg>
   <p class="caption">Operators are method calls. `a + b` dispatches to `a.__add__(b)`; the data model exposes the syntax.</p>
   <p class="score score-high">9.0 · syntax → method dispatch</p>
 </div>
 <div class="card">
   <p class="eyebrow">Data Model · 62</p>
   <h3>Truth and Size</h3>
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+  <svg viewBox="-14 -14 260 98" width="416" height="157" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="22" width="40" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="20.0" y="38.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">x</text><line x1="40" y1="34" x2="63.0" y2="34.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="70,34 63.0,36.8 63.0,31.2" fill="var(--fig-accent)"/><rect x="72" y="0" width="160" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="152.0" y="15.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="60" lengthAdjust="spacing">__bool__()</text><rect x="72" y="22" width="160" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><text x="152.0" y="37.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="84" lengthAdjust="spacing">__len__() != 0</text><rect x="72" y="44" width="160" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><text x="152.0" y="59.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="78" lengthAdjust="spacing">default: True</text></svg>
   <p class="caption">bool(x) calls __bool__ first; if absent, __len__() != 0; if neither, defaults to True.</p>
   <p class="score score-high">9.0 · __bool__ → __len__ → True fallback chain</p>
 </div>
 <div class="card">
   <p class="eyebrow">Data Model · 63</p>
   <h3>Container Protocols</h3>
-  <svg viewBox="-14 -14 300 110" width="480" height="176" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="120" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="60.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">scores[k] = v</text><line x1="120" y1="11" x2="151.0" y2="11.0" stroke="#521000" stroke-width="1.0"/><polygon points="158,11 151.0,13.8 151.0,8.2" fill="#521000"/><rect x="160" y="0" width="110" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="215.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">__setitem__</text><rect x="0" y="28" width="120" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="60.0" y="43.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">k in scores</text><line x1="120" y1="39" x2="151.0" y2="39.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="158,39 151.0,41.8 151.0,36.2" fill="#FF4801"/><rect x="160" y="28" width="110" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="215.0" y="43.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">__contains__</text><rect x="0" y="56" width="120" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="60.0" y="71.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">scores[k]</text><line x1="120" y1="67" x2="151.0" y2="67.0" stroke="#521000" stroke-width="1.0"/><polygon points="158,67 151.0,69.8 151.0,64.2" fill="#521000"/><rect x="160" y="56" width="110" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="215.0" y="71.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">__getitem__</text></svg>
+  <svg viewBox="-14 -14 300 110" width="480" height="176" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="120" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="60.0" y="15.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="78" lengthAdjust="spacing">scores[k] = v</text><line x1="120" y1="11" x2="151.0" y2="11.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="158,11 151.0,13.8 151.0,8.2" fill="var(--fig-ink)"/><rect x="160" y="0" width="110" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="215.0" y="15.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="66" lengthAdjust="spacing">__setitem__</text><rect x="0" y="28" width="120" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="60.0" y="43.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="66" lengthAdjust="spacing">k in scores</text><line x1="120" y1="39" x2="151.0" y2="39.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="158,39 151.0,41.8 151.0,36.2" fill="var(--fig-ink)"/><rect x="160" y="28" width="110" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="215.0" y="43.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="72" lengthAdjust="spacing">__contains__</text><rect x="0" y="56" width="120" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="60.0" y="71.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="54" lengthAdjust="spacing">scores[k]</text><line x1="120" y1="67" x2="151.0" y2="67.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="158,67 151.0,69.8 151.0,64.2" fill="var(--fig-ink)"/><rect x="160" y="56" width="110" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="215.0" y="71.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="66" lengthAdjust="spacing">__getitem__</text></svg>
   <p class="caption">Container syntax routes to narrow protocol methods: assignment to __setitem__, membership to __contains__, lookup to __getitem__.</p>
   <p class="score score-high">9.0 · syntax routes to __setitem__, __contains__, __getitem__</p>
 </div>
 <div class="card">
   <p class="eyebrow">Data Model · 64</p>
   <h3>Callable Objects</h3>
-  <svg viewBox="-14 -14 248 72" width="397" height="115" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="4" width="100" height="36" fill="none" stroke="#521000" stroke-width="1.0"/><text x="6" y="1" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">OBJECT</text><text x="50" y="26" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">__call__</text><line x1="100" y1="22" x2="131.0" y2="22.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="138,22 131.0,24.8 131.0,19.2" fill="#FF4801"/><rect x="140" y="10" width="80" height="24" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="180.0" y="26.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">obj(...)</text></svg>
+  <svg viewBox="-14 -14 248 72" width="397" height="115" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="4" width="100" height="36" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="6" y="1" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">OBJECT</text><text x="50" y="26" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="48" lengthAdjust="spacing">__call__</text><line x1="100" y1="22" x2="131.0" y2="22.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="138,22 131.0,24.8 131.0,19.2" fill="var(--fig-accent)"/><rect x="140" y="10" width="80" height="24" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="180.0" y="26.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="48" lengthAdjust="spacing">obj(...)</text></svg>
   <p class="caption">Defining __call__ makes any object callable; functions are just one shape that satisfies this protocol.</p>
   <p class="score score-high">9.0 · __call__ makes any object callable</p>
 </div>
 <div class="card">
   <p class="eyebrow">Data Model · 65</p>
   <h3>Operator Overloading</h3>
-  <svg viewBox="-14 -14 288 98" width="461" height="157" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="30" width="70" height="28" fill="none" stroke="#521000" stroke-width="1.0"/><text x="35.0" y="48.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">a + b</text><line x1="70" y1="44" x2="109.0" y2="44.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="116,44 109.0,46.8 109.0,41.2" fill="#FF4801"/><text x="93" y="22" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">dispatches</text><rect x="118" y="30" width="140" height="28" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="188.0" y="48.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">a.__add__(b)</text></svg>
+  <svg viewBox="-14 -14 288 98" width="461" height="157" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="30" width="70" height="28" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="35.0" y="48.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="30" lengthAdjust="spacing">a + b</text><line x1="70" y1="44" x2="109.0" y2="44.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="116,44 109.0,46.8 109.0,41.2" fill="var(--fig-accent)"/><text x="93" y="22" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">dispatches</text><rect x="118" y="30" width="140" height="28" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="188.0" y="48.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="72" lengthAdjust="spacing">a.__add__(b)</text></svg>
   <p class="caption">Defining `__add__` on a class lets `+` dispatch into the class's own behavior.</p>
   <p class="score score-high">9.0 · dispatch arrow</p>
 </div>
 <div class="card">
   <p class="eyebrow">Data Model · 66</p>
   <h3>Attribute Access</h3>
-  <svg viewBox="-14 -14 270 98" width="432" height="157" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="22" width="70" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="35.0" y="38.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">obj.x</text><line x1="70" y1="34" x2="93.0" y2="34.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="100,34 93.0,36.8 93.0,31.2" fill="#FF4801"/><rect x="102" y="0" width="140" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="172.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">instance __dict__</text><rect x="102" y="22" width="140" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="172.0" y="37.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">class __dict__</text><rect x="102" y="44" width="140" height="22" fill="none" stroke="#521000" stroke-width="0.5" opacity="0.4"/><text x="172.0" y="59.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">__getattr__</text></svg>
+  <svg viewBox="-14 -14 270 98" width="432" height="157" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="22" width="70" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="35.0" y="38.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="30" lengthAdjust="spacing">obj.x</text><line x1="70" y1="34" x2="93.0" y2="34.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="100,34 93.0,36.8 93.0,31.2" fill="var(--fig-accent)"/><rect x="102" y="0" width="140" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="172.0" y="15.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="102" lengthAdjust="spacing">instance __dict__</text><rect x="102" y="22" width="140" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="172.0" y="37.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="84" lengthAdjust="spacing">class __dict__</text><rect x="102" y="44" width="140" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><text x="172.0" y="59.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="66" lengthAdjust="spacing">__getattr__</text></svg>
   <p class="caption">obj.x checks instance __dict__, then class __dict__, then __getattr__; the first hit wins.</p>
   <p class="score score-high">9.0 · instance __dict__ → class __dict__ → __getattr__</p>
 </div>
 <div class="card">
   <p class="eyebrow">Data Model · 67</p>
   <h3>Bound and Unbound Methods</h3>
-  <svg viewBox="-14 -14 324 84" width="518" height="134" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="110" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="55.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">obj.method</text><line x1="110" y1="11" x2="133.0" y2="11.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="140,11 133.0,13.8 133.0,8.2" fill="#FF4801"/><rect x="142" y="0" width="152" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="218.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">bound · self filled</text><rect x="0" y="32" width="110" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="55.0" y="47.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">Class.method</text><line x1="110" y1="43" x2="133.0" y2="43.0" stroke="#521000" stroke-width="1.0"/><polygon points="140,43 133.0,45.8 133.0,40.2" fill="#521000"/><rect x="142" y="32" width="152" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="218.0" y="47.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">function · self required</text></svg>
+  <svg viewBox="-14 -14 324 84" width="518" height="134" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="110" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="55.0" y="15.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="60" lengthAdjust="spacing">obj.method</text><line x1="110" y1="11" x2="133.0" y2="11.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="140,11 133.0,13.8 133.0,8.2" fill="var(--fig-accent)"/><rect x="142" y="0" width="152" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="218.0" y="15.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="114" lengthAdjust="spacing">bound · self filled</text><rect x="0" y="32" width="110" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="55.0" y="47.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="72" lengthAdjust="spacing">Class.method</text><line x1="110" y1="43" x2="133.0" y2="43.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="140,43 133.0,45.8 133.0,40.2" fill="var(--fig-ink)"/><rect x="142" y="32" width="152" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="218.0" y="47.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="144" lengthAdjust="spacing">function · self required</text></svg>
   <p class="caption">Accessing a method via an instance binds self; accessing it via the class returns the underlying function.</p>
   <p class="score score-high">9.0 · instance.method bound vs Class.method unbound</p>
 </div>
 <div class="card">
   <p class="eyebrow">Data Model · 68</p>
   <h3>Descriptors</h3>
-  <svg viewBox="-14 -14 250 104" width="400" height="166" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="22" width="80" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="40.0" y="38.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">obj.attr</text><line x1="80" y1="34" x2="103.0" y2="34.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="110,34 103.0,36.8 103.0,31.2" fill="#FF4801"/><rect x="112" y="0" width="110" height="70" fill="none" stroke="#521000" stroke-width="1.0"/><text x="118" y="-3" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">DESCRIPTOR</text><text x="167" y="22" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">__get__</text><text x="167" y="38" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">__set__</text><text x="167" y="54" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">__delete__</text></svg>
+  <svg viewBox="-14 -14 250 104" width="400" height="166" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="22" width="80" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="40.0" y="38.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="48" lengthAdjust="spacing">obj.attr</text><line x1="80" y1="34" x2="103.0" y2="34.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="110,34 103.0,36.8 103.0,31.2" fill="var(--fig-accent)"/><rect x="112" y="0" width="110" height="70" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="118" y="-3" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">DESCRIPTOR</text><text x="167" y="22" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">__get__</text><text x="167" y="38" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">__set__</text><text x="167" y="54" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="60" lengthAdjust="spacing">__delete__</text></svg>
   <p class="caption">Attribute access on an instance routes through the descriptor's __get__/__set__/__delete__ when the attribute is a descriptor.</p>
   <p class="score score-high">9.0 · get/set/delete protocol routed through descriptor</p>
 </div>
 <div class="card">
   <p class="eyebrow">Classes · 69</p>
   <h3>Metaclasses</h3>
-  <svg viewBox="-14 -14 328 88" width="525" height="141" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><circle cx="20" cy="28" r="2.5" fill="#521000"/><text x="20" y="54" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">instance</text><line x1="26" y1="28" x2="79.0" y2="28.0" stroke="#521000" stroke-width="1.0"/><polygon points="86,28 79.0,30.8 79.0,25.2" fill="#521000"/><rect x="88" y="10" width="60" height="36" fill="none" stroke="#521000" stroke-width="1.0"/><text x="94" y="7" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">CLASS</text><text x="118" y="32" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">Class</text><line x1="148" y1="28" x2="201.0" y2="28.0" stroke="#521000" stroke-width="1.0"/><polygon points="208,28 201.0,30.8 201.0,25.2" fill="#521000"/><rect x="210" y="10" width="80" height="36" fill="none" stroke="#521000" stroke-width="1.0"/><text x="216" y="7" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">METACLASS</text><text x="250.0" y="32" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">type</text></svg>
+  <svg viewBox="-14 -14 328 88" width="525" height="141" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><circle cx="20" cy="28" r="2.5" fill="var(--fig-ink)"/><text x="20" y="54" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">instance</text><line x1="26" y1="28" x2="79.0" y2="28.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,28 79.0,30.8 79.0,25.2" fill="var(--fig-ink)"/><rect x="88" y="10" width="60" height="36" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="94" y="7" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">CLASS</text><text x="118" y="32" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="30" lengthAdjust="spacing">Class</text><line x1="148" y1="28" x2="201.0" y2="28.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="208,28 201.0,30.8 201.0,25.2" fill="var(--fig-ink)"/><rect x="210" y="10" width="80" height="36" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="216" y="7" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">METACLASS</text><text x="250.0" y="32" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">type</text></svg>
   <p class="caption">A metaclass is the type of a class, just as a class is the type of its instances; type is the default metaclass.</p>
   <p class="score score-high">9.0 · extended triangle to metaclass</p>
 </div>
 <div class="card">
   <p class="eyebrow">Classes · 69</p>
   <h3>Metaclasses</h3>
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+  <svg viewBox="-14 -14 302 88" width="483" height="141" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><circle cx="20" cy="28" r="2.5" fill="var(--fig-ink)"/><text x="20" y="54" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">instance</text><line x1="26" y1="28" x2="79.0" y2="28.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,28 79.0,30.8 79.0,25.2" fill="var(--fig-ink)"/><rect x="88" y="10" width="60" height="36" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="94" y="7" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">CLASS</text><text x="118" y="32" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="30" lengthAdjust="spacing">Class</text><line x1="148" y1="28" x2="201.0" y2="28.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="208,28 201.0,30.8 201.0,25.2" fill="var(--fig-ink)"/><rect x="210" y="10" width="60" height="36" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="216" y="7" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">TYPE</text><text x="240.0" y="32" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">type</text></svg>
   <p class="caption">The class makes instances — the same triangle one level down, with type as the default apex.</p>
   <p class="score score-high">9.0 · extended triangle to metaclass</p>
 </div>
 <div class="card">
   <p class="eyebrow">Data Model · 70</p>
   <h3>Context Managers</h3>
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+  <svg viewBox="-14 -14 272 104" width="435" height="166" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><circle cx="20" cy="48" r="14" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="20" y="52" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="9" fill="var(--fig-ink)" text-anchor="middle" textLength="10.8" lengthAdjust="spacing">in</text><line x1="34" y1="48" x2="69.0" y2="48.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="76,48 69.0,50.8 69.0,45.2" fill="var(--fig-ink)"/><rect x="78" y="36" width="86" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="121.0" y="52.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">body</text><line x1="164" y1="48" x2="199.0" y2="48.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="206,48 199.0,50.8 199.0,45.2" fill="var(--fig-ink)"/><circle cx="220" cy="48" r="14" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="220" y="52" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="9" fill="var(--fig-ink)" text-anchor="middle" textLength="16.2" lengthAdjust="spacing">out</text><line x1="122" y1="60" x2="206" y2="50" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/></svg>
   <p class="caption">A context manager pairs setup with reliable cleanup; the raise path still routes through __exit__.</p>
   <p class="score score-high">9.0 · enter / body / exit bowtie</p>
 </div>
 <div class="card">
   <p class="eyebrow">Data Model · 71</p>
   <h3>Delete Statements</h3>
-  <svg viewBox="-14 -14 228 112" width="365" height="179" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="0" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">BEFORE</text><rect x="0" y="12" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="28.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">x</text><line x1="60" y1="23" x2="93.0" y2="23.0" stroke="#521000" stroke-width="1.0"/><polygon points="100,23 93.0,25.8 93.0,20.2" fill="#521000"/><rect x="102" y="12" width="90" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="147.0" y="27.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">[1, 2, 3]</text><text x="0" y="52" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">AFTER DEL X</text><rect x="0" y="60" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="76.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">x</text><line x1="0" y1="70" x2="60" y2="70" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="60" y1="60" x2="0" y2="80" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><rect x="102" y="60" width="90" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="147.0" y="75.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">[1, 2, 3]</text></svg>
+  <svg viewBox="-14 -14 228 112" width="365" height="179" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="0" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">BEFORE</text><rect x="0" y="12" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="28.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">x</text><line x1="60" y1="23" x2="93.0" y2="23.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="100,23 93.0,25.8 93.0,20.2" fill="var(--fig-ink)"/><rect x="102" y="12" width="90" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="147.0" y="27.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="54" lengthAdjust="spacing">[1, 2, 3]</text><text x="0" y="52" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">AFTER DEL X</text><rect x="0" y="60" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="76.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">x</text><line x1="0" y1="70" x2="60" y2="70" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="60" y1="60" x2="0" y2="80" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><rect x="102" y="60" width="90" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="147.0" y="75.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="54" lengthAdjust="spacing">[1, 2, 3]</text></svg>
   <p class="caption">`del x` removes the name; the object survives if any other reference holds it, otherwise gets collected.</p>
   <p class="score score-high">9.0 · name erased; object survives if referenced</p>
 </div>
 <div class="card">
   <p class="eyebrow">Errors · 72</p>
   <h3>Exceptions</h3>
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+  <svg viewBox="-14 -14 348 128" width="557" height="205" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><line x1="40" y1="20" x2="300" y2="20" stroke="var(--fig-ink)" stroke-width="0.6"/><text x="34" y="23" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="end" letter-spacing="0.5">TRY</text><line x1="40" y1="40" x2="300" y2="40" stroke="var(--fig-ink)" stroke-width="0.6"/><text x="34" y="43" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="end" letter-spacing="0.5">EXCEPT</text><line x1="40" y1="60" x2="300" y2="60" stroke="var(--fig-ink)" stroke-width="0.6"/><text x="34" y="63" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="end" letter-spacing="0.5">ELSE</text><line x1="40" y1="80" x2="300" y2="80" stroke="var(--fig-ink)" stroke-width="0.6"/><text x="34" y="83" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="end" letter-spacing="0.5">FINALLY</text><path d="M50,20 L110,20 L130,60 L200,60 L220,80 L290,80" stroke="var(--fig-accent)" stroke-width="1.4" fill="none"/><circle cx="290" cy="80" r="2.5" fill="var(--fig-accent)"/></svg>
   <p class="caption">try, except, else, and finally as parallel lanes; a single coral path traces what actually runs.</p>
   <p class="score score-high">9.0 · try/except/else/finally lanes with traced path</p>
 </div>
 <div class="card">
   <p class="eyebrow">Errors · 73</p>
   <h3>Assertions</h3>
-  <svg viewBox="-14 -14 332 104" width="531" height="166" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="22" width="110" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="55.0" y="38.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">assert cond</text><line x1="110" y1="22" x2="134.35516502901007" y2="4.139545645392621" stroke="#FF4801" stroke-width="1.4"/><polygon points="140,0 136.0109832871671,6.397479633788596 132.69934677085303,1.881611656996646" fill="#FF4801"/><rect x="142" y="0" width="120" height="20" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="202.0" y="14.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">True · pass</text><line x1="110" y1="46" x2="133.3592169136464" y2="53.78640563788213" stroke="#521000" stroke-width="1.0"/><polygon points="140,56 132.47377916879927,56.44271887242357 134.24465465849354,51.1300924033407" fill="#521000"/><rect x="142" y="50" width="160" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="222.0" y="64.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">False · AssertionError</text></svg>
+  <svg viewBox="-14 -14 332 104" width="531" height="166" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="22" width="110" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="55.0" y="38.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="66" lengthAdjust="spacing">assert cond</text><line x1="110" y1="22" x2="134.35516502901007" y2="4.139545645392621" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="140,0 136.0109832871671,6.397479633788596 132.69934677085303,1.881611656996646" fill="var(--fig-accent)"/><rect x="142" y="0" width="120" height="20" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="202.0" y="14.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="66" lengthAdjust="spacing">True · pass</text><line x1="110" y1="46" x2="133.3592169136464" y2="53.78640563788213" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="140,56 132.47377916879927,56.44271887242357 134.24465465849354,51.1300924033407" fill="var(--fig-ink)"/><rect x="142" y="50" width="160" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="222.0" y="64.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="132" lengthAdjust="spacing">False · AssertionError</text></svg>
   <p class="caption">assert tests a condition; True passes silently, False raises AssertionError with the optional message.</p>
   <p class="score score-high">9.0 · True passes, False raises</p>
 </div>
 <div class="card">
   <p class="eyebrow">Errors · 74</p>
   <h3>Exception Chaining</h3>
-  <svg viewBox="-14 -14 310 98" width="496" height="157" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="20" width="100" height="32" fill="none" stroke="#521000" stroke-width="1.0"/><text x="50.0" y="40.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">ValueError</text><line x1="100" y1="28" x2="173.0" y2="28.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="180,28 173.0,30.8 173.0,25.2" fill="#FF4801"/><text x="140" y="20" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">__cause__</text><line x1="100" y1="44" x2="180" y2="44" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><text x="140" y="62" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">__context__</text><rect x="182" y="20" width="100" height="32" fill="none" stroke="#521000" stroke-width="1.0"/><text x="232.0" y="40.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">RuntimeError</text></svg>
+  <svg viewBox="-14 -14 310 98" width="496" height="157" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="20" width="100" height="32" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="50.0" y="40.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="60" lengthAdjust="spacing">ValueError</text><line x1="100" y1="28" x2="173.0" y2="28.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="180,28 173.0,30.8 173.0,25.2" fill="var(--fig-accent)"/><text x="140" y="20" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">__cause__</text><line x1="100" y1="44" x2="180" y2="44" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><text x="140" y="62" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">__context__</text><rect x="182" y="20" width="100" height="32" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="232.0" y="40.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="72" lengthAdjust="spacing">RuntimeError</text></svg>
   <p class="caption">`raise X from Y` sets `__cause__` (explicit); raising during except sets `__context__` (implicit).</p>
   <p class="score score-high">9.0 · __cause__ vs __context__ distinguished</p>
 </div>
 <div class="card">
   <p class="eyebrow">Errors · 75</p>
   <h3>Exception Groups</h3>
-  <svg viewBox="-14 -14 268 78" width="429" height="125" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="0" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">BEFORE</text><circle cx="40" cy="14" r="2.5" fill="#521000"/><line x1="40" y1="14" x2="20" y2="44" stroke="#521000" stroke-width="0.5" opacity="0.4"/><line x1="40" y1="14" x2="36" y2="44" stroke="#521000" stroke-width="0.5" opacity="0.4"/><line x1="40" y1="14" x2="52" y2="44" stroke="#521000" stroke-width="0.5" opacity="0.4"/><line x1="40" y1="14" x2="68" y2="44" stroke="#521000" stroke-width="0.5" opacity="0.4"/><circle cx="20" cy="44" r="2.5" fill="#521000"/><circle cx="36" cy="44" r="2.5" fill="#521000"/><circle cx="52" cy="44" r="2.5" fill="#521000"/><circle cx="68" cy="44" r="2.5" fill="#521000"/><line x1="90" y1="30" x2="133.0" y2="30.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="140,30 133.0,32.8 133.0,27.2" fill="#FF4801"/><text x="115" y="22" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">except*</text><text x="160" y="0" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">AFTER</text><circle cx="200" cy="14" r="2.5" fill="#521000"/><line x1="200" y1="14" x2="180" y2="44" stroke="#521000" stroke-width="0.5" opacity="0.4"/><line x1="200" y1="14" x2="220" y2="44" stroke="#521000" stroke-width="0.5" opacity="0.4"/><circle cx="180" cy="44" r="2.5" fill="#521000"/><circle cx="220" cy="44" r="2.5" fill="#521000"/></svg>
+  <svg viewBox="-14 -14 268 78" width="429" height="125" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="0" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">BEFORE</text><circle cx="40" cy="14" r="2.5" fill="var(--fig-ink)"/><line x1="40" y1="14" x2="20" y2="44" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><line x1="40" y1="14" x2="36" y2="44" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><line x1="40" y1="14" x2="52" y2="44" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><line x1="40" y1="14" x2="68" y2="44" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><circle cx="20" cy="44" r="2.5" fill="var(--fig-ink)"/><circle cx="36" cy="44" r="2.5" fill="var(--fig-ink)"/><circle cx="52" cy="44" r="2.5" fill="var(--fig-ink)"/><circle cx="68" cy="44" r="2.5" fill="var(--fig-ink)"/><line x1="90" y1="30" x2="133.0" y2="30.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="140,30 133.0,32.8 133.0,27.2" fill="var(--fig-accent)"/><text x="115" y="22" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">except*</text><text x="160" y="0" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">AFTER</text><circle cx="200" cy="14" r="2.5" fill="var(--fig-ink)"/><line x1="200" y1="14" x2="180" y2="44" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><line x1="200" y1="14" x2="220" y2="44" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><circle cx="180" cy="44" r="2.5" fill="var(--fig-ink)"/><circle cx="220" cy="44" r="2.5" fill="var(--fig-ink)"/></svg>
   <p class="caption">except* peels matched leaves out of an ExceptionGroup; survivors regroup and propagate.</p>
   <p class="score score-high">9.0 · except* peels matching leaves</p>
 </div>
 <div class="card">
   <p class="eyebrow">Errors · 76</p>
   <h3>Warnings</h3>
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+  <svg viewBox="-14 -14 320 108" width="512" height="173" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="22" width="90" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="45.0" y="38.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="54" lengthAdjust="spacing">code path</text><line x1="90" y1="22" x2="113.99754952001219" y2="7.6014702879926865" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="120,4 115.43813763520926,10.002450479987811 112.55696140481511,5.200490095997563" fill="var(--fig-ink)"/><rect x="122" y="0" width="170" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="207.0" y="15.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="108" lengthAdjust="spacing">DeprecationWarning</text><line x1="90" y1="46" x2="113.3592169136464" y2="53.78640563788213" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="120,56 112.47377916879925,56.44271887242357 114.24465465849356,51.1300924033407" fill="var(--fig-accent)"/><rect x="122" y="50" width="170" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="207.0" y="65.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="114" lengthAdjust="spacing">execution continues</text></svg>
   <p class="caption">A warning is a soft signal: the message is reported, but execution continues unless filters elevate it.</p>
   <p class="score score-high">9.0 · soft signal; execution continues</p>
 </div>
 <div class="card">
   <p class="eyebrow">Modules · 77</p>
   <h3>Modules</h3>
-  <svg viewBox="-14 -14 286 128" width="458" height="205" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="4" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">SYS.PATH</text><rect x="0" y="14" width="120" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="60.0" y="28.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">cwd</text><rect x="0" y="34" width="120" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="60.0" y="48.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">site-packages</text><rect x="0" y="54" width="120" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="60.0" y="68.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">stdlib</text><rect x="0" y="74" width="120" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="60.0" y="88.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">…</text><line x1="120" y1="46" x2="149.0" y2="46.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="156,46 149.0,48.8 149.0,43.2" fill="#FF4801"/><text x="145" y="30" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">first hit</text><rect x="158" y="34" width="100" height="24" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="208.0" y="50.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">mymod.py</text></svg>
+  <svg viewBox="-14 -14 286 128" width="458" height="205" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="4" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">SYS.PATH</text><rect x="0" y="14" width="120" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="60.0" y="28.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="18" lengthAdjust="spacing">cwd</text><rect x="0" y="34" width="120" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="60.0" y="48.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="78" lengthAdjust="spacing">site-packages</text><rect x="0" y="54" width="120" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="60.0" y="68.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="36" lengthAdjust="spacing">stdlib</text><rect x="0" y="74" width="120" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="60.0" y="88.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">…</text><line x1="120" y1="46" x2="149.0" y2="46.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="156,46 149.0,48.8 149.0,43.2" fill="var(--fig-accent)"/><text x="145" y="30" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">first hit</text><rect x="158" y="34" width="100" height="24" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="208.0" y="50.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="48" lengthAdjust="spacing">mymod.py</text></svg>
   <p class="caption">An import walks sys.path entry by entry; the first directory containing the module wins.</p>
   <p class="score score-high">9.0 · sys.path resolution; first hit wins</p>
 </div>
 <div class="card">
   <p class="eyebrow">Modules · 78</p>
   <h3>Import Aliases</h3>
-  <svg viewBox="-14 -14 240 84" width="384" height="134" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="8" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="start">import numpy as np</text><rect x="0" y="24" width="40" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="20.0" y="39.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">np</text><line x1="40" y1="35" x2="73.0" y2="35.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="80,35 73.0,37.8 73.0,32.2" fill="#FF4801"/><rect x="82" y="24" width="130" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="147.0" y="39.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">numpy module</text></svg>
+  <svg viewBox="-14 -14 240 84" width="384" height="134" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="8" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="start" textLength="108" lengthAdjust="spacing">import numpy as np</text><rect x="0" y="24" width="40" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="20.0" y="39.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="12" lengthAdjust="spacing">np</text><line x1="40" y1="35" x2="73.0" y2="35.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="80,35 73.0,37.8 73.0,32.2" fill="var(--fig-accent)"/><rect x="82" y="24" width="130" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="147.0" y="39.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="72" lengthAdjust="spacing">numpy module</text></svg>
   <p class="caption">`import x as y` binds the name y to the same module object x would have.</p>
   <p class="score score-high">9.0 · two names bind to the same module</p>
 </div>
 <div class="card">
   <p class="eyebrow">Modules · 79</p>
   <h3>Packages</h3>
-  <svg viewBox="-14 -14 268 104" width="429" height="166" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="70" y="0" width="100" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="76" y="-3" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">MYPACKAGE</text><text x="120" y="14" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">__init__.py</text><line x1="120" y1="22" x2="40" y2="50" stroke="#521000" stroke-width="1.0"/><line x1="120" y1="22" x2="120" y2="50" stroke="#521000" stroke-width="1.0"/><line x1="120" y1="22" x2="200" y2="50" stroke="#521000" stroke-width="1.0"/><rect x="10" y="50" width="60" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="40.0" y="65.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">a.py</text><rect x="90" y="50" width="60" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="120.0" y="65.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">b.py</text><rect x="170" y="50" width="60" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="200.0" y="65.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">sub/</text></svg>
+  <svg viewBox="-14 -14 268 104" width="429" height="166" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="70" y="0" width="100" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="76" y="-3" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">MYPACKAGE</text><text x="120" y="14" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="66" lengthAdjust="spacing">__init__.py</text><line x1="120" y1="22" x2="40" y2="50" stroke="var(--fig-ink)" stroke-width="1.0"/><line x1="120" y1="22" x2="120" y2="50" stroke="var(--fig-ink)" stroke-width="1.0"/><line x1="120" y1="22" x2="200" y2="50" stroke="var(--fig-ink)" stroke-width="1.0"/><rect x="10" y="50" width="60" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="40.0" y="65.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">a.py</text><rect x="90" y="50" width="60" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="120.0" y="65.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">b.py</text><rect x="170" y="50" width="60" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="200.0" y="65.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">sub/</text></svg>
   <p class="caption">A directory with __init__.py becomes an importable package; submodules and subpackages nest beneath it.</p>
   <p class="score score-high">9.0 · __init__.py + nested submodules</p>
 </div>
 <div class="card">
   <p class="eyebrow">Modules · 80</p>
   <h3>Virtual Environments</h3>
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+  <svg viewBox="-14 -14 302 104" width="483" height="166" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="110" height="70" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="6" y="-3" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">PROJECT</text><rect x="12" y="18" width="84" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="54.0" y="32.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">code</text><rect x="12" y="42" width="84" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="54.0" y="56.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="72" lengthAdjust="spacing">requirements</text><line x1="110" y1="35" x2="135.0" y2="35.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="142,35 135.0,37.8 135.0,32.2" fill="var(--fig-accent)"/><rect x="144" y="0" width="130" height="70" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="150" y="-3" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">VENV</text><text x="209" y="22" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="36" lengthAdjust="spacing">python</text><text x="209" y="42" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="78" lengthAdjust="spacing">site-packages</text></svg>
   <p class="caption">A venv carries its own interpreter and site-packages, isolating a project's dependencies from the system.</p>
   <p class="score score-high">9.0 · project / venv boundary</p>
 </div>
 <div class="card">
   <p class="eyebrow">Types · 81</p>
   <h3>Type Hints</h3>
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+  <svg viewBox="-14 -14 248 80" width="397" height="128" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="36" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="start" textLength="192" lengthAdjust="spacing">def f(x: int, y: str) -&gt; bool: …</text><line x1="54" y1="28" x2="76" y2="28" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="102" y1="28" x2="124" y2="28" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="150" y1="28" x2="192" y2="28" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/></svg>
   <p class="caption">Annotations describe expected types for tools; the runtime accepts any object regardless.</p>
   <p class="score score-high">9.0 · ghost annotations over runtime values</p>
 </div>
 <div class="card">
   <p class="eyebrow">Types · 82</p>
   <h3>Runtime Type Checks</h3>
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+  <svg viewBox="-14 -14 260 104" width="416" height="166" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="22" width="140" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="70.0" y="38.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="96" lengthAdjust="spacing">isinstance(x, T)</text><line x1="140" y1="22" x2="163.9975495200122" y2="7.6014702879926865" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="170,4 165.43813763520927,10.002450479987811 162.55696140481513,5.200490095997563" fill="var(--fig-accent)"/><rect x="172" y="0" width="60" height="20" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="202.0" y="14.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">True</text><line x1="140" y1="46" x2="163.3592169136464" y2="53.78640563788213" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="170,56 162.47377916879927,56.44271887242357 164.24465465849354,51.1300924033407" fill="var(--fig-ink)"/><rect x="172" y="50" width="60" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="202.0" y="64.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="30" lengthAdjust="spacing">False</text></svg>
   <p class="caption">isinstance and issubclass ask the runtime; the answer is a bool, not a static type refinement.</p>
   <p class="score score-high">9.0 · isinstance returns bool</p>
 </div>
 <div class="card">
   <p class="eyebrow">Types · 83</p>
   <h3>Union and Optional Types</h3>
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+  <svg viewBox="-14 -14 194 108" width="310" height="173" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="14" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">X: INT|STR|NONE</text><rect x="0" y="22" width="44" height="28" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="22.0" y="40.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">x</text><line x1="44" y1="36" x2="83.68506044855047" y2="17.020188481128034" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="90,14 84.89313584100168,19.546164301707844 82.47698505609927,14.494212660548225" fill="var(--fig-ink)"/><line x1="44" y1="36" x2="83.0" y2="36.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="90,36 83.0,38.8 83.0,33.2" fill="var(--fig-ink)"/><line x1="44" y1="36" x2="83.68506044855047" y2="54.97981151887197" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="90,58 82.47698505609927,57.50578733945178 84.89313584100168,52.45383569829216" fill="var(--fig-ink)"/><rect x="92" y="4" width="70" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="127.0" y="19.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="18" lengthAdjust="spacing">int</text><rect x="92" y="26" width="70" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="127.0" y="41.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="18" lengthAdjust="spacing">str</text><rect x="92" y="48" width="70" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="127.0" y="63.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">None</text></svg>
   <p class="caption">`int | str | None` says one slot may hold any of three shapes — including expected absence.</p>
   <p class="score score-high">9.0 · type fork to several shapes</p>
 </div>
 <div class="card">
   <p class="eyebrow">Types · 84</p>
   <h3>Type Aliases</h3>
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+  <svg viewBox="-14 -14 268 132" width="429" height="211" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="30" width="240" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><text x="120.0" y="46.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="192" lengthAdjust="spacing">dict[str, list[tuple[int, str]]]</text><line x1="120" y1="54" x2="120.0" y2="69.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="120,76 117.2,69.0 122.8,69.0" fill="var(--fig-accent)"/><text x="96" y="66" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">type Index = …</text><rect x="80" y="76" width="80" height="24" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="120.0" y="92.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="30" lengthAdjust="spacing">Index</text></svg>
   <p class="caption">A type alias names a complex annotation once so call sites read as the domain meaning, not the type composition.</p>
   <p class="score score-high">9.0 · complex annotation collapses to a name</p>
 </div>
 <div class="card">
   <p class="eyebrow">Types · 85</p>
   <h3>TypedDict</h3>
-  <svg viewBox="-14 -14 228 120" width="365" height="192" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="200" height="86" fill="none" stroke="#521000" stroke-width="1.0"/><text x="6" y="-3" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">USER TYPEDDICT</text><rect x="14" y="18" width="172" height="18" fill="none" stroke="#521000" stroke-width="1.0"/><text x="100.0" y="31.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">id: int</text><rect x="14" y="38" width="172" height="18" fill="none" stroke="#521000" stroke-width="1.0"/><text x="100.0" y="51.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">name: str</text><rect x="14" y="58" width="172" height="18" fill="none" stroke="#521000" stroke-width="1.0"/><text x="100.0" y="71.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">active: bool</text></svg>
+  <svg viewBox="-14 -14 228 120" width="365" height="192" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="200" height="86" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="6" y="-3" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">USER TYPEDDICT</text><rect x="14" y="18" width="172" height="18" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="100.0" y="31.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">id: int</text><rect x="14" y="38" width="172" height="18" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="100.0" y="51.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="54" lengthAdjust="spacing">name: str</text><rect x="14" y="58" width="172" height="18" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="100.0" y="71.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="72" lengthAdjust="spacing">active: bool</text></svg>
   <p class="caption">TypedDict gives each key a typed value, so `obj['x']` is checked against the declared shape.</p>
   <p class="score score-high">9.0 · keys with declared value types</p>
 </div>
 <div class="card">
   <p class="eyebrow">Classes · 86</p>
   <h3>Structured Data Shapes</h3>
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+  <svg viewBox="-14 -14 294 110" width="470" height="176" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="100" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="50.0" y="15.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="54" lengthAdjust="spacing">dataclass</text><line x1="100" y1="11" x2="125.0" y2="11.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="132,11 125.0,13.8 125.0,8.2" fill="var(--fig-ink)"/><rect x="134" y="0" width="130" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="199.0" y="15.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="78" lengthAdjust="spacing">mutable attrs</text><rect x="0" y="28" width="100" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="50.0" y="43.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="60" lengthAdjust="spacing">NamedTuple</text><line x1="100" y1="39" x2="125.0" y2="39.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="132,39 125.0,41.8 125.0,36.2" fill="var(--fig-ink)"/><rect x="134" y="28" width="130" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="199.0" y="43.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="78" lengthAdjust="spacing">tuple + names</text><rect x="0" y="56" width="100" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="50.0" y="71.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="54" lengthAdjust="spacing">TypedDict</text><line x1="100" y1="67" x2="125.0" y2="67.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="132,67 125.0,69.8 125.0,64.2" fill="var(--fig-accent)"/><rect x="134" y="56" width="130" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="199.0" y="71.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="90" lengthAdjust="spacing">dict at runtime</text></svg>
   <p class="caption">The same record can be a mutable dataclass, an immutable NamedTuple, or a runtime dict described by TypedDict.</p>
   <p class="score score-high">9.0 · dataclass vs NamedTuple vs TypedDict runtime trade-offs</p>
 </div>
 <div class="card">
   <p class="eyebrow">Types · 87</p>
   <h3>Literal and Final</h3>
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   <p class="caption">Literal narrows a slot to a fixed set of constant values; Final says the binding will not change.</p>
   <p class="score score-high">9.0 · slot narrows to a fixed set</p>
 </div>
 <div class="card">
   <p class="eyebrow">Types · 88</p>
   <h3>Callable Types</h3>
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   <p class="caption">A Callable annotation describes the callback slot: this argument list must produce this return type.</p>
   <p class="score score-high">9.0 · callback slot shows argument list and return type</p>
 </div>
 <div class="card">
   <p class="eyebrow">Types · 89</p>
   <h3>Generics and TypeVar</h3>
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   <p class="caption">A generic preserves the input type through the call: the same T flows in and out of fn[T].</p>
   <p class="score score-high">9.0 · the same T flows in and out</p>
 </div>
 <div class="card">
   <p class="eyebrow">Types · 90</p>
   <h3>ParamSpec</h3>
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   <p class="caption">ParamSpec preserves the wrapped function's signature through a decorator, parameter for parameter.</p>
   <p class="score score-high">9.0 · P preserved through decorator</p>
 </div>
 <div class="card">
   <p class="eyebrow">Types · 91</p>
   <h3>Overloads</h3>
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+  <svg viewBox="-14 -14 332 92" width="531" height="147" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="0" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">STATIC SIGNATURES</text><rect x="0" y="12" width="150" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="75.0" y="26.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="108" lengthAdjust="spacing">double(int) -&gt; int</text><rect x="0" y="36" width="150" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="75.0" y="50.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="108" lengthAdjust="spacing">double(str) -&gt; str</text><line x1="150" y1="32" x2="183.0" y2="32.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="190,32 183.0,34.8 183.0,29.2" fill="var(--fig-accent)"/><text x="198" y="0" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">RUNTIME</text><rect x="192" y="22" width="112" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="248.0" y="37.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="102" lengthAdjust="spacing">one double() body</text></svg>
   <p class="caption">@overload declares static call signatures for double(int) and double(str); one runtime implementation handles both.</p>
   <p class="score score-high">9.0 · static overload signatures contrasted with one runtime body</p>
 </div>
 <div class="card">
   <p class="eyebrow">Types · 92</p>
   <h3>Casts and Any</h3>
-  <svg viewBox="-14 -14 212 84" width="339" height="134" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="22" width="70" height="24" fill="none" stroke="#521000" stroke-width="0.5" opacity="0.4"/><text x="35.0" y="38.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">Any</text><line x1="70" y1="34" x2="103.0" y2="34.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="110,34 103.0,36.8 103.0,31.2" fill="#FF4801"/><text x="90" y="12" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">cast(T, x)</text><rect x="112" y="22" width="70" height="24" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="147.0" y="38.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">T</text></svg>
+  <svg viewBox="-14 -14 212 84" width="339" height="134" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="22" width="70" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><text x="35.0" y="38.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="18" lengthAdjust="spacing">Any</text><line x1="70" y1="34" x2="103.0" y2="34.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="110,34 103.0,36.8 103.0,31.2" fill="var(--fig-accent)"/><text x="90" y="12" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">cast(T, x)</text><rect x="112" y="22" width="70" height="24" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="147.0" y="38.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">T</text></svg>
   <p class="caption">cast(T, x) tells the type checker to treat x as T; the runtime is unaffected.</p>
   <p class="score score-high">9.0 · Any → cast(T, x) → T, runtime unchanged</p>
 </div>
 <div class="card">
   <p class="eyebrow">Types · 93</p>
   <h3>NewType</h3>
-  <svg viewBox="-14 -14 124 120" width="198" height="192" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="0" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">RUNTIME: INT</text><rect x="0" y="12" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="28.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">42</text><text x="0" y="50" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">STATIC: USERID</text><rect x="0" y="62" width="90" height="24" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="45.0" y="78.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">UserId(42)</text></svg>
+  <svg viewBox="-14 -14 124 120" width="198" height="192" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="0" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">RUNTIME: INT</text><rect x="0" y="12" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="28.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="12" lengthAdjust="spacing">42</text><text x="0" y="50" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">STATIC: USERID</text><rect x="0" y="62" width="90" height="24" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="45.0" y="78.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="60" lengthAdjust="spacing">UserId(42)</text></svg>
   <p class="caption">NewType creates a distinct static identity backed by the same runtime type — UserId is int with a name.</p>
   <p class="score score-high">9.0 · same runtime, distinct static identity</p>
 </div>
 <div class="card">
   <p class="eyebrow">Types · 94</p>
   <h3>Protocols</h3>
-  <svg viewBox="-14 -14 248 106" width="397" height="170" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="4" width="100" height="70" fill="none" stroke="#521000" stroke-width="1.0"/><text x="6" y="1" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">OBJECT</text><text x="50" y="20" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">read()</text><text x="50" y="36" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">write()</text><text x="50" y="52" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">close()</text><line x1="100" y1="38" x2="131.0" y2="38.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="138,38 131.0,40.8 131.0,35.2" fill="#FF4801"/><text x="119" y="0" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">structural</text><rect x="140" y="4" width="80" height="70" fill="none" stroke="#521000" stroke-width="0.5" opacity="0.4"/><text x="146" y="1" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">PROTOCOL</text><text x="180" y="28" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">read()</text><text x="180" y="46" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">close()</text></svg>
+  <svg viewBox="-14 -14 248 106" width="397" height="170" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="4" width="100" height="70" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="6" y="1" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">OBJECT</text><text x="50" y="20" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="36" lengthAdjust="spacing">read()</text><text x="50" y="36" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">write()</text><text x="50" y="52" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">close()</text><line x1="100" y1="38" x2="131.0" y2="38.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="138,38 131.0,40.8 131.0,35.2" fill="var(--fig-accent)"/><text x="119" y="0" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">structural</text><rect x="140" y="4" width="80" height="70" fill="none" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><text x="146" y="1" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">PROTOCOL</text><text x="180" y="28" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="36" lengthAdjust="spacing">read()</text><text x="180" y="46" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">close()</text></svg>
   <p class="caption">An object satisfies a protocol structurally — by having the required methods — not by inheriting it.</p>
   <p class="score score-high">9.0 · structural duck check</p>
 </div>
 <div class="card">
   <p class="eyebrow">Classes · 95</p>
   <h3>Abstract Base Classes</h3>
-  <svg viewBox="-14 -14 302 88" width="483" height="141" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><circle cx="20" cy="28" r="2.5" fill="#521000"/><text x="20" y="54" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">instance</text><line x1="26" y1="28" x2="79.0" y2="28.0" stroke="#521000" stroke-width="1.0"/><polygon points="86,28 79.0,30.8 79.0,25.2" fill="#521000"/><rect x="88" y="10" width="60" height="36" fill="none" stroke="#521000" stroke-width="1.0"/><text x="94" y="7" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">CLASS</text><text x="118" y="32" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">Class</text><line x1="148" y1="28" x2="201.0" y2="28.0" stroke="#521000" stroke-width="1.0"/><polygon points="208,28 201.0,30.8 201.0,25.2" fill="#521000"/><rect x="210" y="10" width="60" height="36" fill="none" stroke="#521000" stroke-width="1.0"/><text x="216" y="7" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">TYPE</text><text x="240.0" y="32" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">type</text></svg>
+  <svg viewBox="-14 -14 302 88" width="483" height="141" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><circle cx="20" cy="28" r="2.5" fill="var(--fig-ink)"/><text x="20" y="54" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">instance</text><line x1="26" y1="28" x2="79.0" y2="28.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,28 79.0,30.8 79.0,25.2" fill="var(--fig-ink)"/><rect x="88" y="10" width="60" height="36" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="94" y="7" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">CLASS</text><text x="118" y="32" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="30" lengthAdjust="spacing">Class</text><line x1="148" y1="28" x2="201.0" y2="28.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="208,28 201.0,30.8 201.0,25.2" fill="var(--fig-ink)"/><rect x="210" y="10" width="60" height="36" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="216" y="7" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">TYPE</text><text x="240.0" y="32" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">type</text></svg>
   <p class="caption">An ABC sits on the same triangle as concrete classes; subclasses inherit the abstract methods they must implement.</p>
   <p class="score score-high">9.0 · same triangle as concrete classes</p>
 </div>
 <div class="card">
   <p class="eyebrow">Types · 96</p>
   <h3>Enums</h3>
-  <svg viewBox="-14 -14 308 88" width="493" height="141" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="280" height="60" fill="none" stroke="#521000" stroke-width="0.5" opacity="0.4"/><text x="6" y="-3" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">COLOR · CLOSED SET</text><rect x="20" y="16" width="50" height="28" fill="none" stroke="#521000" stroke-width="1.0"/><text x="45.0" y="34.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">RED</text><rect x="80" y="16" width="50" height="28" fill="none" stroke="#521000" stroke-width="1.0"/><text x="105.0" y="34.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">GREEN</text><rect x="140" y="16" width="50" height="28" fill="none" stroke="#521000" stroke-width="1.0"/><text x="165.0" y="34.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">BLUE</text><rect x="200" y="16" width="50" height="28" fill="none" stroke="#521000" stroke-width="1.0"/><text x="225.0" y="34.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">no more</text></svg>
+  <svg viewBox="-14 -14 308 88" width="493" height="141" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="280" height="60" fill="none" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><text x="6" y="-3" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">COLOR · CLOSED SET</text><rect x="20" y="16" width="50" height="28" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="45.0" y="34.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="18" lengthAdjust="spacing">RED</text><rect x="80" y="16" width="50" height="28" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="105.0" y="34.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="30" lengthAdjust="spacing">GREEN</text><rect x="140" y="16" width="50" height="28" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="165.0" y="34.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">BLUE</text><rect x="200" y="16" width="50" height="28" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="225.0" y="34.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">no more</text></svg>
   <p class="caption">An enum names a fixed set of symbolic values; no new members appear at runtime.</p>
   <p class="score score-high">9.0 · closed set of symbolic values</p>
 </div>
 <div class="card">
   <p class="eyebrow">Text · 97</p>
   <h3>Regular Expressions</h3>
-  <svg viewBox="-14 -14 228 120" width="365" height="192" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="4" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">PATTERN</text><text x="0" y="24" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="start">^\d{2}-\d{2}$</text><text x="0" y="56" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">INPUT</text><rect x="0" y="64" width="200" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><rect x="40" y="64" width="120" height="20" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="100.0" y="78.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">12-34</text></svg>
-  <p class="caption">^ and $ anchor the pattern; quantifiers like {2} bound how many times a token repeats.</p>
-  <p class="score score-high">9.0 · pattern ruler with anchors</p>
+  <svg viewBox="-14 -14 168 124" width="269" height="198" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="4" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">PATTERN</text><rect x="0" y="10" width="76" height="20" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="38.0" y="24.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="66" lengthAdjust="spacing">([A-Za-z]+)</text><rect x="76" y="10" width="22" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="87.0" y="24.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="12" lengthAdjust="spacing">: </text><rect x="98" y="10" width="40" height="20" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="118.0" y="24.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="30" lengthAdjust="spacing">(\d+)</text><rect x="0" y="56" width="28" height="20" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="14.0" y="70.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="18" lengthAdjust="spacing">Ada</text><rect x="28" y="56" width="22" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="39.0" y="70.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="12" lengthAdjust="spacing">: </text><rect x="50" y="56" width="22" height="20" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="61.0" y="70.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="12" lengthAdjust="spacing">10</text><line x1="38" y1="30" x2="14" y2="56" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="118" y1="30" x2="61" y2="56" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><text x="14" y="90" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">name</text><text x="61" y="90" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">score</text></svg>
+  <p class="caption">findall returns only what the parentheses capture: `([A-Za-z]+)` takes the name and `(\d+)` the score, one (name, score) pair per record.</p>
+  <p class="score score-high">9.0 · the cell's pattern with both capture groups dropped onto Ada: 10; one-move 0.75 and restraint 0.75 for two rows plus two drops; 1.5/1/0.75/1/1 · 1/1/0.75 · 1/0.5</p>
 </div>
 <div class="card">
   <p class="eyebrow">Standard Library · 98</p>
   <h3>Number Parsing</h3>
-  <svg viewBox="-14 -14 232 92" width="371" height="147" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="22" width="70" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="35.0" y="38.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">"42"</text><line x1="70" y1="34" x2="95.0" y2="34.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="102,34 95.0,36.8 95.0,31.2" fill="#FF4801"/><text x="86" y="26" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">int()</text><rect x="104" y="10" width="60" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="134.0" y="25.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">42</text><rect x="104" y="36" width="100" height="22" fill="none" stroke="#521000" stroke-width="0.5" opacity="0.4"/><text x="154.0" y="51.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">ValueError</text></svg>
+  <svg viewBox="-14 -14 232 92" width="371" height="147" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="22" width="70" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="35.0" y="38.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">"42"</text><line x1="70" y1="34" x2="95.0" y2="34.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="102,34 95.0,36.8 95.0,31.2" fill="var(--fig-accent)"/><text x="86" y="26" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">int()</text><rect x="104" y="10" width="60" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="134.0" y="25.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="12" lengthAdjust="spacing">42</text><rect x="104" y="36" width="100" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><text x="154.0" y="51.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="60" lengthAdjust="spacing">ValueError</text></svg>
   <p class="caption">int() turns text into a typed number; malformed input raises ValueError instead of guessing.</p>
   <p class="score score-high">9.0 · int() success path vs ValueError</p>
 </div>
 <div class="card">
   <p class="eyebrow">Errors · 99</p>
   <h3>Custom Exceptions</h3>
-  <svg viewBox="-14 -14 248 118" width="397" height="189" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="220" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="110.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">BaseException</text><rect x="0" y="24" width="220" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="110.0" y="39.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">Exception</text><rect x="0" y="48" width="220" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="110.0" y="63.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">ValueError</text><rect x="0" y="72" width="220" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="110.0" y="87.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">MyDomainError</text></svg>
+  <svg viewBox="-14 -14 248 118" width="397" height="189" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="220" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="110.0" y="15.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="78" lengthAdjust="spacing">BaseException</text><rect x="0" y="24" width="220" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="110.0" y="39.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="54" lengthAdjust="spacing">Exception</text><rect x="0" y="48" width="220" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="110.0" y="63.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="60" lengthAdjust="spacing">ValueError</text><rect x="0" y="72" width="220" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="110.0" y="87.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="78" lengthAdjust="spacing">MyDomainError</text></svg>
   <p class="caption">Subclassing an existing exception gains a domain name without changing semantics.</p>
   <p class="score score-high">9.0 · subclass chain to a domain name</p>
 </div>
 <div class="card">
   <p class="eyebrow">Standard Library · 100</p>
   <h3>JSON</h3>
-  <svg viewBox="-14 -14 248 144" width="397" height="230" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><line x1="120" y1="0" x2="120" y2="110" stroke="#521000" stroke-width="0.6"/><text x="60" y="4" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle" letter-spacing="0.5">JSON</text><text x="180" y="4" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle" letter-spacing="0.5">PYTHON</text><text x="0" y="24" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="start">object</text><text x="132" y="24" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="start">dict</text><text x="0" y="38" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="start">array</text><text x="132" y="38" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="start">list</text><text x="0" y="52" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="start">string</text><text x="132" y="52" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="start">str</text><text x="0" y="66" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="start">number</text><text x="132" y="66" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="start">int / float</text><text x="0" y="80" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="start">true / false</text><text x="132" y="80" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="start">True / False</text><text x="0" y="94" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="start">null</text><text x="132" y="94" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="start">None</text></svg>
+  <svg viewBox="-14 -14 248 144" width="397" height="230" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><line x1="120" y1="0" x2="120" y2="110" stroke="var(--fig-ink)" stroke-width="0.6"/><text x="60" y="4" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="middle" letter-spacing="0.5">JSON</text><text x="180" y="4" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="middle" letter-spacing="0.5">PYTHON</text><text x="0" y="24" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="start" textLength="36" lengthAdjust="spacing">object</text><text x="132" y="24" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="start" textLength="24" lengthAdjust="spacing">dict</text><text x="0" y="38" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="start" textLength="30" lengthAdjust="spacing">array</text><text x="132" y="38" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="start" textLength="24" lengthAdjust="spacing">list</text><text x="0" y="52" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="start" textLength="36" lengthAdjust="spacing">string</text><text x="132" y="52" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="start" textLength="18" lengthAdjust="spacing">str</text><text x="0" y="66" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="start" textLength="36" lengthAdjust="spacing">number</text><text x="132" y="66" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="start" textLength="66" lengthAdjust="spacing">int / float</text><text x="0" y="80" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="start" textLength="72" lengthAdjust="spacing">true / false</text><text x="132" y="80" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="start" textLength="72" lengthAdjust="spacing">True / False</text><text x="0" y="94" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="start" textLength="24" lengthAdjust="spacing">null</text><text x="132" y="94" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="start" textLength="24" lengthAdjust="spacing">None</text></svg>
   <p class="caption">Six type pairs bridge the JSON text boundary; each json value maps to one Python type.</p>
   <p class="score score-high">9.0 · two-column type mapping</p>
 </div>
 <div class="card">
   <p class="eyebrow">Standard Library · 101</p>
   <h3>Logging</h3>
-  <svg viewBox="-14 -14 192 152" width="307" height="243" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="120" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="60.0" y="14.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">CRITICAL</text><rect x="122" y="0" width="40" height="20" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="142.0" y="14.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">50</text><rect x="0" y="22" width="120" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="60.0" y="36.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">ERROR</text><rect x="122" y="22" width="40" height="20" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="142.0" y="36.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">40</text><rect x="0" y="44" width="120" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="60.0" y="58.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">WARNING</text><rect x="122" y="44" width="40" height="20" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="142.0" y="58.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">30</text><rect x="0" y="66" width="120" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="60.0" y="80.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">INFO</text><rect x="122" y="66" width="40" height="20" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="142.0" y="80.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">20</text><rect x="0" y="88" width="120" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="60.0" y="102.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">DEBUG</text><rect x="122" y="88" width="40" height="20" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="142.0" y="102.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">10</text></svg>
-  <p class="caption">Five severity levels; the logger's configured threshold drops everything below it.</p>
-  <p class="score score-high">9.0 · five thresholded levels</p>
+  <svg viewBox="-14 -14 294 158" width="470" height="253" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="6" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">RECORDS</text><text x="202" y="6" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">STDOUT</text><rect x="96" y="0" width="76" height="112" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="102" y="-3" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">HANDLER</text><rect x="0" y="14" width="64" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><text x="32.0" y="29.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="30" lengthAdjust="spacing">debug</text><line x1="64" y1="25" x2="130" y2="25" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><rect x="0" y="46" width="64" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="32.0" y="61.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">info</text><line x1="64" y1="57" x2="193.0" y2="57.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="200,57 193.0,59.8 193.0,54.2" fill="var(--fig-ink)"/><rect x="202" y="46" width="64" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="234.0" y="61.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">info</text><rect x="0" y="78" width="64" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="32.0" y="93.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">warning</text><line x1="64" y1="89" x2="193.0" y2="89.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="200,89 193.0,91.8 193.0,86.2" fill="var(--fig-ink)"/><rect x="202" y="78" width="64" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="234.0" y="93.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">warning</text><line x1="134" y1="4" x2="134" y2="108" stroke="var(--fig-accent)" stroke-width="1.4"/><text x="134" y="124" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">level=INFO</text></svg>
+  <p class="caption">The handler's level is a gate: debug is below INFO and never reaches stdout, while info and warning pass through unchanged.</p>
+  <p class="score score-high">9.5 · the cell's three records crossing the handler's INFO gate, debug dropped; earns-place 0.75 since the output already shows the drop; 1.5/0.75/1/1/1 · 1/1/1 · 1/0.5</p>
 </div>
 <div class="card">
   <p class="eyebrow">Standard Library · 102</p>
   <h3>Testing</h3>
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+  <svg viewBox="-14 -14 278 108" width="445" height="173" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="80" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="40.0" y="15.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">arrange</text><line x1="80" y1="11" x2="101.0" y2="11.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="108,11 101.0,13.8 101.0,8.2" fill="var(--fig-ink)"/><rect x="110" y="0" width="140" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="180.0" y="15.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="72" lengthAdjust="spacing">set up state</text><rect x="0" y="24" width="80" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="40.0" y="39.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="18" lengthAdjust="spacing">act</text><line x1="80" y1="35" x2="101.0" y2="35.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="108,35 101.0,37.8 101.0,32.2" fill="var(--fig-ink)"/><rect x="110" y="24" width="140" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="180.0" y="39.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="96" lengthAdjust="spacing">perform behavior</text><rect x="0" y="48" width="80" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="40.0" y="63.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="36" lengthAdjust="spacing">assert</text><line x1="80" y1="59" x2="101.0" y2="59.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="108,59 101.0,61.8 101.0,56.2" fill="var(--fig-ink)"/><rect x="110" y="48" width="140" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="180.0" y="63.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="84" lengthAdjust="spacing">compare result</text></svg>
   <p class="caption">arrange-act-assert: set up the state, perform the behavior under test, compare the result to expectations.</p>
   <p class="score score-high">9.0 · arrange-act-assert three-row pattern</p>
 </div>
 <div class="card">
   <p class="eyebrow">Standard Library · 103</p>
   <h3>Subprocesses</h3>
-  <svg viewBox="-14 -14 352 88" width="563" height="141" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="22" width="70" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="35.0" y="38.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">parent</text><line x1="70" y1="34" x2="103.0" y2="34.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="110,34 103.0,36.8 103.0,31.2" fill="#FF4801"/><text x="90" y="26" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">spawn</text><rect x="112" y="22" width="110" height="24" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="167.0" y="38.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">child process</text><line x1="222" y1="34" x2="245.0" y2="34.0" stroke="#521000" stroke-width="1.0"/><polygon points="252,34 245.0,36.8 245.0,31.2" fill="#521000"/><rect x="254" y="22" width="70" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="289.0" y="38.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">output</text></svg>
+  <svg viewBox="-14 -14 352 88" width="563" height="141" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="22" width="70" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="35.0" y="38.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="36" lengthAdjust="spacing">parent</text><line x1="70" y1="34" x2="103.0" y2="34.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="110,34 103.0,36.8 103.0,31.2" fill="var(--fig-accent)"/><text x="90" y="26" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">spawn</text><rect x="112" y="22" width="110" height="24" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="167.0" y="38.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="78" lengthAdjust="spacing">child process</text><line x1="222" y1="34" x2="245.0" y2="34.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="252,34 245.0,36.8 245.0,31.2" fill="var(--fig-ink)"/><rect x="254" y="22" width="70" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="289.0" y="38.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="36" lengthAdjust="spacing">output</text></svg>
   <p class="caption">subprocess.run spawns a child process and captures its stdout, stderr, and exit code as portable evidence.</p>
   <p class="score score-high">9.0 · spawn → child → captured output</p>
 </div>
 <div class="card">
   <p class="eyebrow">Standard Library · 104</p>
   <h3>Threads and Processes</h3>
-  <svg viewBox="-14 -14 328 166" width="525" height="266" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="0" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">THREADS: SHARED INTERPRETER</text><line x1="84" y1="26" x2="292" y2="26" stroke="#521000" stroke-width="0.6"/><text x="78" y="29" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="end" letter-spacing="0.5">GIL</text><line x1="84" y1="50" x2="292" y2="50" stroke="#521000" stroke-width="0.6"/><text x="78" y="53" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="end" letter-spacing="0.5">THREAD A</text><line x1="84" y1="74" x2="292" y2="74" stroke="#521000" stroke-width="0.6"/><text x="78" y="77" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="end" letter-spacing="0.5">THREAD B</text><rect x="94" y="44" width="26" height="10" fill="none" stroke="#521000" stroke-width="1.0"/><rect x="142" y="68" width="26" height="10" fill="none" stroke="#521000" stroke-width="1.0"/><rect x="190" y="44" width="26" height="10" fill="none" stroke="#521000" stroke-width="1.0"/><rect x="238" y="68" width="26" height="10" fill="none" stroke="#521000" stroke-width="1.0"/><text x="0" y="98" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">PROCESSES: ISOLATED</text><rect x="84" y="110" width="76" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="122.0" y="124.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">proc A</text><rect x="184" y="110" width="76" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="222.0" y="124.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">proc B</text><line x1="172" y1="104" x2="172" y2="134" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/></svg>
+  <svg viewBox="-14 -14 328 166" width="525" height="266" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="0" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">THREADS: SHARED INTERPRETER</text><line x1="84" y1="26" x2="292" y2="26" stroke="var(--fig-ink)" stroke-width="0.6"/><text x="78" y="29" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="end" letter-spacing="0.5">GIL</text><line x1="84" y1="50" x2="292" y2="50" stroke="var(--fig-ink)" stroke-width="0.6"/><text x="78" y="53" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="end" letter-spacing="0.5">THREAD A</text><line x1="84" y1="74" x2="292" y2="74" stroke="var(--fig-ink)" stroke-width="0.6"/><text x="78" y="77" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="end" letter-spacing="0.5">THREAD B</text><rect x="94" y="44" width="26" height="10" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><rect x="142" y="68" width="26" height="10" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><rect x="190" y="44" width="26" height="10" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><rect x="238" y="68" width="26" height="10" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="0" y="98" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">PROCESSES: ISOLATED</text><rect x="84" y="110" width="76" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="122.0" y="124.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="36" lengthAdjust="spacing">proc A</text><rect x="184" y="110" width="76" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="222.0" y="124.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="36" lengthAdjust="spacing">proc B</text><line x1="172" y1="104" x2="172" y2="134" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/></svg>
   <p class="caption">Threads share memory but the GIL serialises Python bytecode; processes run in parallel with isolated memory.</p>
   <p class="score score-high">9.0 · thread GIL sharing contrasted with process isolation</p>
 </div>
 <div class="card">
   <p class="eyebrow">Standard Library · 105</p>
   <h3>Networking</h3>
-  <svg viewBox="-14 -14 392 74" width="627" height="118" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="18" width="64" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="4" y="13" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">STR</text><text x="32.0" y="33.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">"ping"</text><line x1="64" y1="29" x2="89.0" y2="29.0" stroke="#521000" stroke-width="1.0"/><polygon points="96,29 89.0,31.8 89.0,26.2" fill="#521000"/><text x="80" y="23" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">encode</text><rect x="98" y="18" width="70" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="102" y="13" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">BYTES</text><text x="133.0" y="33.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">b'ping'</text><line x1="168" y1="29" x2="192" y2="29" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><text x="180" y="8" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle" letter-spacing="0.5">SOCKET</text><rect x="194" y="18" width="70" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="198" y="13" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">BYTES</text><text x="229.0" y="33.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">b'ping'</text><line x1="264" y1="29" x2="289.0" y2="29.0" stroke="#521000" stroke-width="1.0"/><polygon points="296,29 289.0,31.8 289.0,26.2" fill="#521000"/><text x="280" y="23" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">decode</text><rect x="298" y="18" width="64" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="302" y="13" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">STR</text><text x="330.0" y="33.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">"ping"</text></svg>
+  <svg viewBox="-14 -14 392 74" width="627" height="118" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="18" width="64" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="4" y="13" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">STR</text><text x="32.0" y="33.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="36" lengthAdjust="spacing">"ping"</text><line x1="64" y1="29" x2="89.0" y2="29.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="96,29 89.0,31.8 89.0,26.2" fill="var(--fig-ink)"/><text x="80" y="23" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">encode</text><rect x="98" y="18" width="70" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="102" y="13" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">BYTES</text><text x="133.0" y="33.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">b'ping'</text><line x1="168" y1="29" x2="192" y2="29" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><text x="180" y="8" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="middle" letter-spacing="0.5">SOCKET</text><rect x="194" y="18" width="70" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="198" y="13" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">BYTES</text><text x="229.0" y="33.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">b'ping'</text><line x1="264" y1="29" x2="289.0" y2="29.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="296,29 289.0,31.8 289.0,26.2" fill="var(--fig-ink)"/><text x="280" y="23" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">decode</text><rect x="298" y="18" width="64" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="302" y="13" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">STR</text><text x="330.0" y="33.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="36" lengthAdjust="spacing">"ping"</text></svg>
   <p class="caption">Text crosses the socket as bytes — `encode` marks the python → wire boundary, `decode` brings the bytes back to a Python `str`.</p>
   <p class="score score-high">9.0 · text ↔ bytes across the socket boundary</p>
 </div>
 <div class="card">
   <p class="eyebrow">Standard Library · 106</p>
   <h3>Dates and Times</h3>
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+  <svg viewBox="-14 -14 308 116" width="493" height="186" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><line x1="10" y1="40" x2="270" y2="40" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="10.0" y1="37.0" x2="10.0" y2="43.0" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="42.5" y1="37.0" x2="42.5" y2="43.0" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="75.0" y1="37.0" x2="75.0" y2="43.0" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="107.5" y1="37.0" x2="107.5" y2="43.0" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="140.0" y1="37.0" x2="140.0" y2="43.0" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="172.5" y1="37.0" x2="172.5" y2="43.0" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="205.0" y1="37.0" x2="205.0" y2="43.0" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="237.5" y1="37.0" x2="237.5" y2="43.0" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="270.0" y1="37.0" x2="270.0" y2="43.0" stroke="var(--fig-ink)" stroke-width="0.6"/><line x1="150" y1="30" x2="150" y2="50" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><text x="150" y="24" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">one instant</text><circle cx="90" cy="70" r="12" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="90" y="74" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="9" fill="var(--fig-ink)" text-anchor="middle" textLength="16.2" lengthAdjust="spacing">−5h</text><line x1="90" y1="58" x2="150" y2="50" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><circle cx="210" cy="70" r="12" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="210" y="74" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="9" fill="var(--fig-ink)" text-anchor="middle" textLength="16.2" lengthAdjust="spacing">+0h</text><line x1="210" y1="58" x2="150" y2="50" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/></svg>
   <p class="caption">An aware datetime carries a UTC offset; one instant in time reads differently on two clocks.</p>
   <p class="score score-high">9.0 · one instant, two clock offsets</p>
 </div>
 <div class="card">
   <p class="eyebrow">Standard Library · 107</p>
   <h3>CSV Data</h3>
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+  <svg viewBox="-14 -14 240 124" width="384" height="198" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="0" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">ROWS · RECORDS</text><rect x="0" y="12" width="70" height="20" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="35.0" y="26.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="12" lengthAdjust="spacing">id</text><rect x="70" y="12" width="70" height="20" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="105.0" y="26.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">name</text><rect x="140" y="12" width="70" height="20" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="175.0" y="26.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="30" lengthAdjust="spacing">score</text><rect x="0" y="32" width="70" height="18" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="35.0" y="45.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">1</text><rect x="70" y="32" width="70" height="18" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="105.0" y="45.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="18" lengthAdjust="spacing">Ada</text><rect x="140" y="32" width="70" height="18" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="175.0" y="45.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="12" lengthAdjust="spacing">97</text><rect x="0" y="52" width="70" height="18" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="35.0" y="65.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">2</text><rect x="70" y="52" width="70" height="18" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="105.0" y="65.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="12" lengthAdjust="spacing">Bo</text><rect x="140" y="52" width="70" height="18" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="175.0" y="65.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="12" lengthAdjust="spacing">88</text><rect x="0" y="72" width="70" height="18" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="35.0" y="85.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">3</text><rect x="70" y="72" width="70" height="18" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="105.0" y="85.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="12" lengthAdjust="spacing">Cy</text><rect x="140" y="72" width="70" height="18" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="175.0" y="85.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="12" lengthAdjust="spacing">76</text></svg>
   <p class="caption">CSV files are rows of records; each line has the same columns in the same order.</p>
   <p class="score score-high">9.0 · rows × columns; same shape per line</p>
 </div>
 <div class="card">
   <p class="eyebrow">Async · 108</p>
   <h3>Async Await</h3>
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+  <svg viewBox="-14 -14 308 112" width="493" height="179" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><line x1="20" y1="28" x2="270" y2="28" stroke="var(--fig-ink)" stroke-width="0.6"/><text x="14" y="31" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="end" letter-spacing="0.5">LOOP</text><line x1="20" y1="64" x2="270" y2="64" stroke="var(--fig-ink)" stroke-width="0.6"/><text x="14" y="67" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="end" letter-spacing="0.5">CORO</text><rect x="40" y="58" width="34" height="12" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><line x1="76" y1="64" x2="110" y2="28" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><rect x="112" y="22" width="58" height="12" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><line x1="172" y1="28" x2="206" y2="64" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><rect x="208" y="58" width="34" height="12" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="95" y="16" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">await</text><text x="190" y="16" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">resume</text></svg>
   <p class="caption">On await, the coroutine yields to the loop; the loop runs other work and resumes when the awaitable is ready.</p>
   <p class="score score-high">9.0 · loop/coro swimlane with await handoffs</p>
 </div>
 <div class="card">
   <p class="eyebrow">Async · 109</p>
   <h3>Async Iteration and Context</h3>
-  <svg viewBox="-14 -14 308 112" width="493" height="179" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><line x1="20" y1="28" x2="270" y2="28" stroke="#521000" stroke-width="0.6"/><text x="14" y="31" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="end" letter-spacing="0.5">LOOP</text><line x1="20" y1="64" x2="270" y2="64" stroke="#521000" stroke-width="0.6"/><text x="14" y="67" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="end" letter-spacing="0.5">CORO</text><rect x="40" y="58" width="34" height="12" fill="none" stroke="#521000" stroke-width="1.0"/><line x1="76" y1="64" x2="110" y2="28" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><rect x="112" y="22" width="58" height="12" fill="none" stroke="#521000" stroke-width="1.0"/><line x1="172" y1="28" x2="206" y2="64" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><rect x="208" y="58" width="34" height="12" fill="none" stroke="#521000" stroke-width="1.0"/><text x="95" y="16" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">await</text><text x="190" y="16" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">resume</text></svg>
+  <svg viewBox="-14 -14 308 112" width="493" height="179" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><line x1="20" y1="28" x2="270" y2="28" stroke="var(--fig-ink)" stroke-width="0.6"/><text x="14" y="31" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="end" letter-spacing="0.5">LOOP</text><line x1="20" y1="64" x2="270" y2="64" stroke="var(--fig-ink)" stroke-width="0.6"/><text x="14" y="67" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="end" letter-spacing="0.5">CORO</text><rect x="40" y="58" width="34" height="12" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><line x1="76" y1="64" x2="110" y2="28" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><rect x="112" y="22" width="58" height="12" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><line x1="172" y1="28" x2="206" y2="64" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><rect x="208" y="58" width="34" height="12" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="95" y="16" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">await</text><text x="190" y="16" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">resume</text></svg>
   <p class="caption">async iteration and async with both rest on the same loop-vs-coroutine handoff as await.</p>
   <p class="score score-high">9.0 · loop/coro lanes with await yields</p>
 </div>
diff --git a/public/prototyping/production-figures-gestalt.html b/public/prototyping/production-figures-gestalt.html
index 01ba998..0badca8 100644
--- a/public/prototyping/production-figures-gestalt.html
+++ b/public/prototyping/production-figures-gestalt.html
@@ -44,15 +44,15 @@
 </style>
 </head>
 <body>
-<div class="prototype-banner"><strong>Prototype</strong> · All 124 figures currently registered in src/marginalia.py FIGURES; each card names where it renders. · <a href="/prototyping/">all prototypes</a></div>
+<div class="prototype-banner"><strong>Prototype</strong> · All 125 figures currently registered in src/marginalia.py FIGURES; each card names where it renders. · <a href="/prototyping/">all prototypes</a></div>
 
 <article class="example-shell">
   <section class="example-intro">
-    <p class="eyebrow">Production figure registry · 124 figures</p>
+    <p class="eyebrow">Production figure registry · 125 figures</p>
     <h1>Production figures gestalt</h1>
     <p class="meta">Every figure currently registered in <code>src/marginalia.py</code> <code>FIGURES</code>. Each card names the figure, where it renders today (an example attachment, a journey section, or "not yet attached"), and the intrinsic viewBox dimensions. Use this page beside the example-figure rubric to triage which figures are shipping, which are journey-only, and which are sitting in the registry waiting for an example attachment.</p>
   </section>
-  <div class="section-grid"><figure><h3>aliasing-mutation</h3><svg viewBox="-14 -14 248 203" width="397" height="325" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="12" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">BEFORE</text><rect x="0" y="18" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="34.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">first</text><rect x="0" y="48" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="64.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">second</text><line x1="60" y1="30" x2="80.03839178306819" y2="42.331318020349656" stroke="#521000" stroke-width="1.0"/><polygon 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stroke="#521000" stroke-width="1.0"/><text x="90.0" y="80.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">factorial(0) ← base</text><line x1="192" y1="90" x2="192" y2="18" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="192" y1="30" x2="192.0" y2="25.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="192,18 194.8,25.0 189.2,25.0" fill="#FF4801"/></svg><figcaption>attached to /examples/recursion · viewBox 200×100</figcaption><p class="score-line">v2 scores: recursion 9.0</p></figure><figure><h3>decorator-rebind</h3><svg viewBox="-14 -14 260 138" width="416" height="221" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="12" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">BEFORE</text><rect x="0" y="22.0" width="60" height="24" fill="none" stroke="#521000" 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stroke="#521000" stroke-width="1.0"/><text x="30.0" y="94.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">f</text><line x1="60" y1="90" x2="89.0" y2="90.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="96,90 89.0,92.8 89.0,87.2" fill="#FF4801"/><rect x="98" y="76" width="80" height="28" fill="none" stroke="#521000" stroke-width="1.0"/><text x="138.0" y="94.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">wrapper</text><rect x="186" y="78" width="44" height="24" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="208.0" y="94.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">f₀</text><line x1="178" y1="90" x2="186" y2="90" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/></svg><figcaption>attached to /examples/decorators · viewBox 232×110</figcaption><p class="score-line">v2 scores: decorators 9.0</p></figure><figure><h3>mro-chain</h3><svg viewBox="-14 -14 228 180" width="365" height="288" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="80" y="0" width="40" height="22" fill="none" stroke="#521000" stroke-width="0.5" opacity="0.4"/><text x="100" y="16" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">A</text><line x1="98" y1="22" x2="58" y2="42" stroke="#521000" stroke-width="0.5" opacity="0.4"/><line x1="102" y1="22" x2="142" y2="42" stroke="#521000" stroke-width="0.5" opacity="0.4"/><rect x="40" y="42" width="40" height="22" fill="none" stroke="#521000" stroke-width="0.5" opacity="0.4"/><text x="60" y="58" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">B</text><rect x="120" y="42" width="40" height="22" fill="none" stroke="#521000" stroke-width="0.5" opacity="0.4"/><text x="140" y="58" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">C</text><line x1="60" y1="64" x2="96" y2="80" stroke="#521000" stroke-width="0.5" opacity="0.4"/><line x1="140" y1="64" x2="104" y2="80" stroke="#521000" stroke-width="0.5" opacity="0.4"/><rect x="80" y="80" width="40" height="22" fill="none" stroke="#521000" stroke-width="0.5" opacity="0.4"/><text x="100" y="96" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">D</text><text x="0" y="118" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">MRO</text><rect x="0" y="124" width="36" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="18.0" y="139.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">D</text><rect x="36" y="124" width="36" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="54.0" y="139.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">B</text><rect x="72" y="124" width="36" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="90.0" y="139.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">C</text><rect x="108" y="124" width="36" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="126.0" y="139.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">A</text><rect x="144" y="124" width="56" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="172.0" y="139.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">object</text></svg><figcaption>attached to /examples/inheritance-and-super · viewBox 200×152</figcaption><p class="score-line">v2 scores: inheritance-and-super 9.0</p></figure><figure><h3>dataclass-fields</h3><svg viewBox="-14 -14 340 104" width="544" height="166" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="12" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">DECLARATION</text><rect x="0" y="18" width="110" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="55.0" y="32.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">name : str</text><rect x="0" y="38" width="110" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="55.0" y="52.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" 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xmlns="http://www.w3.org/2000/svg"><circle cx="20" cy="28" r="2.5" fill="#521000"/><text x="20" y="54" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">instance</text><line x1="26" y1="28" x2="79.0" y2="28.0" stroke="#521000" stroke-width="1.0"/><polygon points="86,28 79.0,30.8 79.0,25.2" fill="#521000"/><rect x="88" y="10" width="60" height="36" fill="none" stroke="#521000" stroke-width="1.0"/><text x="94" y="7" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">CLASS</text><text x="118" y="32" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">Class</text><line x1="148" y1="28" x2="201.0" y2="28.0" stroke="#521000" stroke-width="1.0"/><polygon points="208,28 201.0,30.8 201.0,25.2" fill="#521000"/><rect x="210" y="10" width="60" height="36" fill="none" 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9.0</p></figure><figure><h3>unpacking-bind</h3><svg viewBox="-14 -14 180 108" width="288" height="173" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="30" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="15.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">1</text><rect x="30" y="0" width="30" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="45.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">2</text><rect x="60" y="0" width="30" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="75.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">3</text><rect x="90" y="0" width="30" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="105.0" 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font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">b</text><line x1="15" y1="22" x2="15" y2="58" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="45" y1="22" x2="75" y2="58" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="75" y1="22" x2="75" y2="58" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="105" y1="22" x2="75" y2="58" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="135" y1="22" x2="135" y2="58" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/></svg><figcaption>attached to /examples/unpacking · viewBox 152×80</figcaption><p class="score-line">v2 scores: unpacking 9.0</p></figure><figure><h3>comprehension-equivalence</h3><svg viewBox="-14 -14 308 104" width="493" height="166" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="280" height="22" fill="rgba(82, 16, 0, 0.05)" 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y="12" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">HASH → BUCKET</text><text x="0" y="34" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="start">0</text><rect x="14" y="18" width="80" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="54.0" y="34.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">"a" → 1</text><text x="0" y="58" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="start">1</text><rect x="14" y="42" width="80" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="54.0" y="58.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">"b" → 2</text><text x="0" y="82" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="start">2</text><rect x="14" y="66" width="80" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="54.0" y="82.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">"c" → 3</text><line x1="96" y1="54" x2="125.0" y2="54.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="132,54 125.0,56.8 125.0,51.2" fill="#FF4801"/><rect x="134" y="42" width="80" height="24" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="174.0" y="58.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">"d" → 4</text><text x="218" y="58" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="start">collision</text></svg><figcaption>attached to /examples/dicts · viewBox 270×88</figcaption><p class="score-line">v2 scores: dicts 9.0</p></figure><figure><h3>number-lines</h3><svg viewBox="-14 -14 288 106" width="461" height="170" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="8" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">INT · UNBOUNDED</text><line x1="0" y1="22" x2="260" y2="22" stroke="#521000" stroke-width="0.6"/><line x1="0.0" y1="19.0" x2="0.0" y2="25.0" stroke="#521000" stroke-width="0.6"/><line x1="32.5" y1="19.0" x2="32.5" y2="25.0" stroke="#521000" stroke-width="0.6"/><line x1="65.0" y1="19.0" x2="65.0" y2="25.0" stroke="#521000" stroke-width="0.6"/><line x1="97.5" y1="19.0" x2="97.5" y2="25.0" stroke="#521000" stroke-width="0.6"/><line x1="130.0" y1="19.0" x2="130.0" y2="25.0" stroke="#521000" stroke-width="0.6"/><line x1="162.5" y1="19.0" x2="162.5" y2="25.0" stroke="#521000" stroke-width="0.6"/><line 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stroke-width="0.6"/><line x1="148" y1="61.0" x2="148" y2="67.0" stroke="#521000" stroke-width="0.6"/><line x1="160" y1="61.0" x2="160" y2="67.0" stroke="#521000" stroke-width="0.6"/><line x1="188" y1="61.0" x2="188" y2="67.0" stroke="#521000" stroke-width="0.6"/><line x1="230" y1="61.0" x2="230" y2="67.0" stroke="#521000" stroke-width="0.6"/><line x1="260" y1="61.0" x2="260" y2="67.0" stroke="#521000" stroke-width="0.6"/><circle cx="140" cy="64" r="2.5" fill="#FF4801"/></svg><figcaption>attached to /examples/numbers · viewBox 260×78</figcaption><p class="score-line">v2 scores: numbers 9.0</p></figure><figure><h3>expression-tree</h3><svg viewBox="-14 -14 248 120" width="397" height="192" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><circle cx="120" cy="12" r="12" fill="none" stroke="#521000" stroke-width="1.0"/><text x="120" y="16" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="9" fill="#521000" text-anchor="middle">*</text><circle cx="80" cy="50" r="12" fill="none" stroke="#521000" stroke-width="1.0"/><text x="80" y="54" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="9" fill="#521000" text-anchor="middle">+</text><circle cx="180" cy="50" r="10" fill="none" stroke="#521000" stroke-width="1.0"/><text x="180" y="54" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="9" fill="#521000" text-anchor="middle">4</text><circle cx="56" cy="80" r="10" fill="none" stroke="#521000" stroke-width="1.0"/><text x="56" y="84" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="9" fill="#521000" text-anchor="middle">2</text><circle cx="104" cy="80" r="10" fill="none" stroke="#521000" stroke-width="1.0"/><text x="104" y="84" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="9" fill="#521000" text-anchor="middle">3</text><line x1="111.30000679686704" y1="20.264993542976317" x2="88.69999320313296" y2="41.73500645702369" stroke="#521000" stroke-width="1.0"/><line x1="130.13782890665075" y1="18.42062497421214" x2="171.5518092444577" y2="44.649479188156555" stroke="#521000" stroke-width="1.0"/><line x1="72.50365942934691" y1="59.370425713316365" x2="62.246950475544246" y2="72.19131190556969" stroke="#521000" stroke-width="1.0"/><line x1="87.49634057065309" y1="59.370425713316365" x2="97.75304952445576" y2="72.19131190556969" stroke="#521000" stroke-width="1.0"/></svg><figcaption>attached to /examples/operators · viewBox 220×92</figcaption><p class="score-line">v2 scores: operators 9.0</p></figure><figure><h3>none-singleton</h3><svg viewBox="-14 -14 268 112" width="429" height="179" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="16.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">a</text><rect x="0" y="28" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="44.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">b</text><rect x="0" y="56" width="60" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="30.0" y="72.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="#521000" text-anchor="middle" font-style="italic">c</text><line x1="60" y1="12" x2="151.26933236651425" y2="38.07695210471835" stroke="#521000" stroke-width="1.0"/><polygon points="158,40 150.5001132084016,40.769219158112655 152.0385515246269,35.38468505132405" fill="#521000"/><line x1="60" y1="40" x2="151.0" y2="40.0" stroke="#521000" stroke-width="1.0"/><polygon points="158,40 151.0,42.8 151.0,37.2" fill="#521000"/><line x1="60" y1="68" x2="151.26933236651425" y2="41.92304789528165" stroke="#521000" 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text-anchor="middle">é</text><text x="0" y="60" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">UTF-8 BYTES</text><rect x="0" y="68" width="40" height="14" fill="none" stroke="#521000" stroke-width="1.0"/><text x="20.0" y="79.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">63</text><rect x="40" y="68" width="40" height="14" fill="none" stroke="#521000" stroke-width="1.0"/><text x="60.0" y="79.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">61</text><rect x="80" y="68" width="40" height="14" fill="none" stroke="#521000" stroke-width="1.0"/><text x="100.0" y="79.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">66</text><rect x="120" y="68" width="20" height="14" fill="none" stroke="#521000" stroke-width="1.0"/><text x="130.0" y="79.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">c3</text><rect x="140" y="68" width="20" height="14" fill="none" stroke="#521000" stroke-width="1.0"/><text x="150.0" y="79.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">a9</text></svg><figcaption>attached to /examples/strings · viewBox 200×84</figcaption><p class="score-line">v2 scores: strings 9.0</p></figure><figure><h3>sort-stability</h3><svg viewBox="-14 -14 298 128" width="477" height="205" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="4" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">INPUT</text><text x="180" y="4" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" 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monospace" font-size="10" fill="#521000" text-anchor="middle">2 · Eve</text><line x1="80" y1="44" x2="180" y2="22" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="80" y1="88" x2="180" y2="44" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="80" y1="22" x2="180" y2="66" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="80" y1="66" x2="180" y2="88" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/></svg><figcaption>attached to /examples/sorting · viewBox 270×100</figcaption><p class="score-line">v2 scores: sorting 9.0</p></figure><figure><h3>kw-only-separator</h3><svg viewBox="-14 -14 228 84" width="365" height="134" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="18" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="start">def f(a, b, *, c, d): …</text><line x1="75.0" y1="22" x2="75.0" y2="38" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><text x="33" y="50" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">positional or kw</text><text x="120" y="50" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">keyword only</text></svg><figcaption>attached to /examples/keyword-only-arguments, positional-only-parameters · viewBox 200×56</figcaption><p class="score-line">v2 scores: keyword-only-arguments 9.0 · positional-only-parameters 9.0</p></figure><figure><h3>positional-only-separator</h3><svg viewBox="-14 -14 228 84" width="365" height="134" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="18" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="start">def f(a, b, /, c, d): …</text><line x1="75.0" y1="22" x2="75.0" y2="38" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><text x="33" y="50" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">positional only</text><text x="120" y="50" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">positional or kw</text></svg><figcaption>attached to /examples/positional-only-parameters · viewBox 200×56</figcaption><p class="score-line">v2 scores: positional-only-parameters 9.0</p></figure><figure><h3>generator-ribbon</h3><svg viewBox="-14 -14 288 78" width="461" height="125" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="8" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">PAUSED BETWEEN YIELDS · RESUMED BY NEXT()</text><rect x="0" y="16" width="64" height="30" fill="rgba(82, 16, 0, 0.05)" stroke="none"/><rect x="136" y="16" width="72" height="30" fill="rgba(82, 16, 0, 0.05)" stroke="none"/><rect x="0" y="16" width="260" height="30" fill="none" stroke="#521000" stroke-width="1.0"/><line x1="64" y1="16" x2="64" y2="46" stroke="#FF4801" stroke-width="1.4"/><line x1="136" y1="16" x2="136" y2="46" stroke="#FF4801" stroke-width="1.4"/><line x1="208" y1="16" x2="208" y2="46" stroke="#FF4801" stroke-width="1.4"/><text x="32" y="36" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">…</text><text x="100" y="36" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">yield</text><text x="172" y="36" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">…</text><text x="244" y="36" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">yield</text></svg><figcaption>attached to /examples/generators · viewBox 260×50</figcaption><p class="score-line">v2 scores: generators 9.0</p></figure><figure><h3>truth-and-size</h3><svg viewBox="-14 -14 260 98" width="416" height="157" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="22" width="40" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="20.0" y="38.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">x</text><line x1="40" y1="34" x2="63.0" y2="34.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="70,34 63.0,36.8 63.0,31.2" fill="#FF4801"/><rect x="72" y="0" width="160" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="152.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">__bool__()</text><rect x="72" y="22" width="160" height="22" fill="none" stroke="#521000" stroke-width="0.5" opacity="0.4"/><text x="152.0" y="37.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">__len__() != 0</text><rect x="72" y="44" width="160" height="22" fill="none" stroke="#521000" stroke-width="0.5" opacity="0.4"/><text x="152.0" y="59.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">default: True</text></svg><figcaption>attached to /examples/truth-and-size · viewBox 232×70</figcaption><p class="score-line">v2 scores: truth-and-size 9.0</p></figure><figure><h3>descriptor-protocol</h3><svg viewBox="-14 -14 250 104" width="400" height="166" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="22" width="80" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="40.0" y="38.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">obj.attr</text><line x1="80" y1="34" x2="103.0" y2="34.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="110,34 103.0,36.8 103.0,31.2" fill="#FF4801"/><rect x="112" y="0" width="110" height="70" fill="none" stroke="#521000" stroke-width="1.0"/><text x="118" y="-3" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">DESCRIPTOR</text><text x="167" y="22" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">__get__</text><text x="167" y="38" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">__set__</text><text x="167" y="54" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">__delete__</text></svg><figcaption>attached to /examples/descriptors · viewBox 222×76</figcaption><p class="score-line">v2 scores: descriptors 9.0</p></figure><figure><h3>bound-unbound</h3><svg viewBox="-14 -14 324 84" width="518" height="134" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="110" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="55.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">obj.method</text><line x1="110" y1="11" x2="133.0" y2="11.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="140,11 133.0,13.8 133.0,8.2" fill="#FF4801"/><rect x="142" y="0" width="152" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="218.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">bound · self filled</text><rect x="0" y="32" width="110" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="55.0" y="47.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">Class.method</text><line x1="110" y1="43" x2="133.0" y2="43.0" stroke="#521000" stroke-width="1.0"/><polygon points="140,43 133.0,45.8 133.0,40.2" fill="#521000"/><rect x="142" y="32" width="152" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="218.0" y="47.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">function · self required</text></svg><figcaption>attached to /examples/bound-and-unbound-methods · viewBox 296×56</figcaption><p class="score-line">v2 scores: bound-and-unbound-methods 9.0</p></figure><figure><h3>method-kinds</h3><svg viewBox="-14 -14 300 98" width="480" height="157" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="110" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="55.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">@classmethod</text><line x1="110" y1="11" x2="133.0" y2="11.0" stroke="#521000" stroke-width="1.0"/><polygon points="140,11 133.0,13.8 133.0,8.2" fill="#521000"/><rect x="142" y="0" width="130" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="207.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">first arg · Cls</text><rect x="0" y="24" width="110" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="55.0" y="39.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">@staticmethod</text><line x1="110" y1="35" x2="133.0" y2="35.0" stroke="#521000" stroke-width="1.0"/><polygon points="140,35 133.0,37.8 133.0,32.2" fill="#521000"/><rect x="142" y="24" width="130" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="207.0" y="39.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">first arg · (none)</text><rect x="0" y="48" width="110" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="55.0" y="63.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">instance</text><line x1="110" y1="59" x2="133.0" y2="59.0" stroke="#521000" stroke-width="1.0"/><polygon points="140,59 133.0,61.8 133.0,56.2" fill="#521000"/><rect x="142" y="48" width="130" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="207.0" y="63.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">first arg · self</text></svg><figcaption>attached to /examples/classmethods-and-staticmethods · viewBox 272×70</figcaption><p class="score-line">v2 scores: classmethods-and-staticmethods 9.0</p></figure><figure><h3>callable-objects</h3><svg viewBox="-14 -14 248 72" width="397" height="115" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="4" width="100" height="36" fill="none" stroke="#521000" stroke-width="1.0"/><text x="6" y="1" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">OBJECT</text><text x="50" y="26" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">__call__</text><line x1="100" y1="22" x2="131.0" y2="22.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="138,22 131.0,24.8 131.0,19.2" fill="#FF4801"/><rect x="140" y="10" width="80" height="24" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="180.0" y="26.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">obj(...)</text></svg><figcaption>attached to /examples/callable-objects · viewBox 220×44</figcaption><p class="score-line">v2 scores: callable-objects 9.0</p></figure><figure><h3>attribute-lookup</h3><svg viewBox="-14 -14 270 98" width="432" height="157" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="22" width="70" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="35.0" y="38.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">obj.x</text><line x1="70" y1="34" x2="93.0" y2="34.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="100,34 93.0,36.8 93.0,31.2" fill="#FF4801"/><rect x="102" y="0" width="140" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="172.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">instance __dict__</text><rect x="102" y="22" width="140" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="172.0" y="37.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">class __dict__</text><rect x="102" y="44" width="140" height="22" fill="none" stroke="#521000" stroke-width="0.5" opacity="0.4"/><text x="172.0" y="59.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">__getattr__</text></svg><figcaption>attached to /examples/attribute-access · viewBox 242×70</figcaption><p class="score-line">v2 scores: attribute-access 9.0</p></figure><figure><h3>guard-clauses</h3><svg viewBox="-14 -14 292 132" width="467" height="211" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="180" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="90.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">if not valid: return</text><rect x="0" y="24" width="180" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="90.0" y="39.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">if missing: return None</text><rect x="0" y="48" width="180" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="90.0" y="63.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">if special_case: return X</text><rect x="0" y="78" width="180" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="90.0" y="93.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">main work …</text><line x1="190" y1="11" x2="213.0" y2="11.0" stroke="#521000" stroke-width="1.0"/><polygon points="220,11 213.0,13.8 213.0,8.2" fill="#521000"/><line x1="190" y1="35" x2="213.0" y2="35.0" stroke="#521000" stroke-width="1.0"/><polygon points="220,35 213.0,37.8 213.0,32.2" fill="#521000"/><line x1="190" y1="59" x2="213.0" y2="59.0" stroke="#521000" stroke-width="1.0"/><polygon points="220,59 213.0,61.8 213.0,56.2" fill="#521000"/><text x="222" y="38" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="start">exit</text></svg><figcaption>attached to /examples/guard-clauses · viewBox 264×104</figcaption><p class="score-line">v2 scores: guard-clauses 9.0</p></figure><figure><h3>bytes-vs-bytearray</h3><svg viewBox="-14 -14 336 114" width="538" height="182" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="4" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">BYTES — FROZEN</text><rect x="0" y="12" width="160" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="80.0" y="28.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">b'\\x63\\x61\\x66'</text><text x="0" y="50" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">BYTEARRAY — MUTABLE</text><rect x="0" y="58" width="180" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="90.0" y="74.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">bytearray(b'\\x63\\x61')</text><line x1="180" y1="70" x2="211.0" y2="70.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="218,70 211.0,72.8 211.0,67.2" fill="#FF4801"/><text x="222" y="67" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="start">.append(0x66)</text></svg><figcaption>attached to /examples/bytes-and-bytearray · viewBox 308×86</figcaption><p class="score-line">v2 scores: bytes-and-bytearray 9.0</p></figure><figure><h3>sentinel-iteration</h3><svg viewBox="-14 -14 348 120" width="557" height="192" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="22" width="120" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="60.0" y="38.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">iter(read, '')</text><line x1="120" y1="34" x2="145.0" y2="34.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="152,34 145.0,36.8 145.0,31.2" fill="#FF4801"/><rect x="154" y="0" width="70" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="189.0" y="14.0" font-family="'JetBrains 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text-anchor="start">sentinel · stop</text></svg><figcaption>attached to /examples/sentinel-iteration · viewBox 320×92</figcaption><p class="score-line">v2 scores: sentinel-iteration 9.0</p></figure><figure><h3>partial-functions</h3><svg viewBox="-14 -14 362 64" width="579" height="102" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="12" width="100" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="50.0" y="28.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">f(a, b, c)</text><line x1="100" y1="24" x2="123.0" y2="24.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="130,24 123.0,26.8 123.0,21.2" fill="#FF4801"/><rect x="132" y="0" width="100" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="182.0" y="16.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">partial(f, 1)</text><line x1="232" y1="24" x2="255.0" y2="24.0" stroke="#521000" stroke-width="1.0"/><polygon points="262,24 255.0,26.8 255.0,21.2" fill="#521000"/><rect x="264" y="12" width="70" height="24" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="299.0" y="28.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">g(b, c)</text></svg><figcaption>attached to /examples/partial-functions · viewBox 334×36</figcaption><p class="score-line">v2 scores: partial-functions 9.0</p></figure><figure><h3>args-kwargs</h3><svg viewBox="-14 -14 308 96" width="493" height="154" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="20" y="22" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="start">def f(*args, **kwargs): …</text><line x1="71.0" y1="26" x2="71.0" y2="44" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="122.0" y1="26" x2="122.0" y2="44" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><text x="71.0" y="56" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">→ tuple</text><text x="122.0" y="56" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">→ dict</text></svg><figcaption>attached to /examples/args-and-kwargs · viewBox 280×68</figcaption><p class="score-line">v2 scores: args-and-kwargs 9.0</p></figure><figure><h3>multiple-return</h3><svg viewBox="-14 -14 208 138" width="333" height="221" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="180" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="90.0" y="16.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">def f(): return a, b</text><line 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198 104" width="317" height="166" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="170" height="28" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="85.0" y="18.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">lambda x: x + 1</text><line x1="40" y1="28" x2="40" y2="50" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="120" y1="28" x2="120" y2="50" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><text x="40" y="62" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">params</text><text x="120" y="62" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">expression</text></svg><figcaption>attached to /examples/lambdas · viewBox 170×76</figcaption><p class="score-line">v2 scores: lambdas 9.0</p></figure><figure><h3>property-fork</h3><svg viewBox="-14 -14 260 100" width="416" height="160" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="22" width="70" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="35.0" y="38.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">obj.x</text><line x1="70" y1="22" x2="103.61654946377425" y2="6.872552741301585" stroke="#FF4801" stroke-width="1.4"/><polygon points="110,4 104.76557056029488,9.425932955791883 102.46752836725362,4.319172526811288" fill="#FF4801"/><rect x="112" y="0" width="120" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="172.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">fget / fset</text><line x1="70" y1="46" x2="103.20900249898267" y2="54.30225062474567" 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text-anchor="middle">False</text></svg><figcaption>attached to /examples/truthiness · viewBox 240×70</figcaption><p class="score-line">v2 scores: truthiness 9.0</p></figure><figure><h3>boolean-truth-table</h3><svg viewBox="-14 -14 160 92" width="256" height="147" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="64" y="0" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle" letter-spacing="0.5">A AND B</text><text x="80" y="16" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">T</text><text x="112" y="16" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">F</text><text x="58" y="36" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="end">T</text><text x="58" y="56" 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font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">F</text></svg><figcaption>attached to /examples/booleans · viewBox 132×64</figcaption><p class="score-line">v2 scores: booleans 9.0</p></figure><figure><h3>set-buckets</h3><svg viewBox="-14 -14 184 118" width="294" height="189" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="4" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">KEYS ONLY</text><rect x="0" y="14" width="50" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="25.0" y="28.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">a</text><rect x="0" y="36" width="50" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="25.0" y="50.0" font-family="'JetBrains Mono', 'IBM Plex Mono', 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9.0</p></figure><figure><h3>tuple-frozen</h3><svg viewBox="-14 -14 308 76" width="493" height="122" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="0" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">FROZEN SEQUENCE</text><rect x="0" y="12" width="180" height="26" fill="none" stroke="#521000" stroke-width="1.0"/><text x="90.0" y="29.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">(3, 1, 4, 1)</text><line x1="45" y1="8" x2="45" y2="42" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="90" y1="8" x2="90" y2="42" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="135" y1="8" x2="135" y2="42" stroke="#521000" stroke-width="0.6" stroke-dasharray="2 2"/><rect x="190" y="12" width="80" height="26" fill="none" stroke="#521000" stroke-width="0.5" 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xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="120" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="60.0" y="14.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">CRITICAL</text><rect x="122" y="0" width="40" height="20" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="142.0" y="14.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">50</text><rect x="0" y="22" width="120" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="60.0" y="36.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">ERROR</text><rect x="122" y="22" width="40" height="20" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="142.0" y="36.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" 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9.0</p></figure><figure><h3>socket-byte-boundary</h3><svg viewBox="-14 -14 392 74" width="627" height="118" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="18" width="64" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="4" y="13" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">STR</text><text x="32.0" y="33.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">"ping"</text><line x1="64" y1="29" x2="89.0" y2="29.0" stroke="#521000" stroke-width="1.0"/><polygon points="96,29 89.0,31.8 89.0,26.2" fill="#521000"/><text x="80" y="23" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">encode</text><rect x="98" y="18" width="70" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" 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xmlns="http://www.w3.org/2000/svg"><text x="0" y="0" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">LITERAL[…]</text><rect x="0" y="12" width="40" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="20.0" y="28.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">x</text><line x1="40" y1="24" x2="64.1756479396351" y2="7.882901373576604" stroke="#521000" stroke-width="1.0"/><polygon points="70,4 65.72880848906574,10.212642197722566 62.622487390204455,5.5531605494306415" fill="#521000"/><line x1="40" y1="24" x2="63.0" y2="24.0" stroke="#521000" stroke-width="1.0"/><polygon points="70,24 63.0,26.8 63.0,21.2" fill="#521000"/><line x1="40" y1="24" x2="64.1756479396351" y2="40.1170986264234" stroke="#521000" stroke-width="1.0"/><polygon points="70,44 62.622487390204455,42.446839450569364 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9.0</p></figure><figure><h3>callable-type</h3><svg viewBox="-14 -14 380 70" width="608" height="112" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="0" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">CALLBACK SLOT</text><rect x="0" y="12" width="170" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="85.0" y="27.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">Callable[[int, str], bool]</text><line x1="170" y1="23" x2="195.0" y2="23.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="202,23 195.0,25.8 195.0,20.2" fill="#FF4801"/><rect x="204" y="2" width="58" height="34" fill="none" stroke="#521000" stroke-width="1.0"/><text x="233.0" y="23.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">int,str</text><line x1="262" y1="19" x2="283.0" y2="19.0" stroke="#521000" stroke-width="1.0"/><polygon points="290,19 283.0,21.8 283.0,16.2" fill="#521000"/><rect x="292" y="2" width="58" height="34" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="321.0" y="23.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">bool</text></svg><figcaption>attached to /examples/callable-types · viewBox 352×42</figcaption><p class="score-line">v2 scores: callable-types 9.0</p></figure><figure><h3>isinstance-check</h3><svg viewBox="-14 -14 260 104" width="416" height="166" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="22" width="140" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="70.0" y="38.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">isinstance(x, T)</text><line x1="140" y1="22" x2="163.9975495200122" y2="7.6014702879926865" stroke="#FF4801" stroke-width="1.4"/><polygon points="170,4 165.43813763520927,10.002450479987811 162.55696140481513,5.200490095997563" fill="#FF4801"/><rect x="172" y="0" width="60" height="20" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="202.0" y="14.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">True</text><line x1="140" y1="46" x2="163.3592169136464" y2="53.78640563788213" stroke="#521000" stroke-width="1.0"/><polygon points="170,56 162.47377916879927,56.44271887242357 164.24465465849354,51.1300924033407" fill="#521000"/><rect x="172" y="50" width="60" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="202.0" y="64.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">False</text></svg><figcaption>attached to /examples/runtime-type-checks · viewBox 232×76</figcaption><p class="score-line">v2 scores: runtime-type-checks 9.0</p></figure><figure><h3>collections-containers</h3><svg viewBox="-14 -14 312 120" width="499" height="192" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="110" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="55.0" y="14.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">deque</text><rect x="112" y="0" width="170" height="20" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="197.0" y="14.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">fast appends both ends</text><rect x="0" y="22" width="110" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="55.0" y="36.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, 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font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">namedtuple</text><rect x="112" y="66" width="170" height="20" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="197.0" y="80.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">tuple with names</text></svg><figcaption>attached to /examples/collections-module · viewBox 284×92</figcaption><p class="score-line">v2 scores: collections-module 9.0</p></figure><figure><h3>container-methods</h3><svg viewBox="-14 -14 300 110" width="480" height="176" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="120" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="60.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">scores[k] = v</text><line x1="120" 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fill="#521000" text-anchor="middle">__contains__</text><rect x="0" y="56" width="120" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="60.0" y="71.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">scores[k]</text><line x1="120" y1="67" x2="151.0" y2="67.0" stroke="#521000" stroke-width="1.0"/><polygon points="158,67 151.0,69.8 151.0,64.2" fill="#521000"/><rect x="160" y="56" width="110" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="215.0" y="71.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">__getitem__</text></svg><figcaption>attached to /examples/container-protocols · viewBox 272×82</figcaption><p class="score-line">v2 scores: container-protocols 9.0</p></figure><figure><h3>typed-dict-shape</h3><svg viewBox="-14 -14 228 120" width="365" height="192" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="200" height="86" fill="none" stroke="#521000" stroke-width="1.0"/><text x="6" y="-3" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">USER TYPEDDICT</text><rect x="14" y="18" width="172" height="18" fill="none" stroke="#521000" stroke-width="1.0"/><text x="100.0" y="31.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">id: int</text><rect x="14" y="38" width="172" height="18" fill="none" stroke="#521000" stroke-width="1.0"/><text x="100.0" y="51.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">name: str</text><rect x="14" y="58" width="172" height="18" fill="none" stroke="#521000" stroke-width="1.0"/><text x="100.0" y="71.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">active: bool</text></svg><figcaption>attached to /examples/typed-dicts · viewBox 200×92</figcaption><p class="score-line">v2 scores: typed-dicts 9.0</p></figure><figure><h3>structured-shapes</h3><svg viewBox="-14 -14 294 110" width="470" height="176" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="100" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="50.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">dataclass</text><line x1="100" y1="11" x2="125.0" y2="11.0" stroke="#521000" stroke-width="1.0"/><polygon points="132,11 125.0,13.8 125.0,8.2" fill="#521000"/><rect x="134" y="0" width="130" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="199.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">mutable attrs</text><rect x="0" y="28" width="100" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="50.0" y="43.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">NamedTuple</text><line x1="100" y1="39" x2="125.0" y2="39.0" stroke="#521000" stroke-width="1.0"/><polygon points="132,39 125.0,41.8 125.0,36.2" fill="#521000"/><rect x="134" y="28" width="130" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="199.0" y="43.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">tuple + names</text><rect x="0" y="56" width="100" height="22" fill="none" stroke="#521000" stroke-width="1.0"/><text x="50.0" y="71.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">TypedDict</text><line x1="100" y1="67" x2="125.0" y2="67.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="132,67 125.0,69.8 125.0,64.2" fill="#FF4801"/><rect x="134" y="56" width="130" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="199.0" y="71.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">dict at runtime</text></svg><figcaption>attached to /examples/structured-data-shapes · viewBox 266×82</figcaption><p class="score-line">v2 scores: structured-data-shapes 9.0</p></figure><figure><h3>csv-records</h3><svg viewBox="-14 -14 240 124" width="384" height="198" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="0" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">ROWS · RECORDS</text><rect x="0" y="12" width="70" height="20" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="35.0" y="26.0" 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font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">88</text><rect x="0" y="72" width="70" height="18" fill="none" stroke="#521000" stroke-width="1.0"/><text x="35.0" y="85.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">3</text><rect x="70" y="72" width="70" height="18" fill="none" stroke="#521000" stroke-width="1.0"/><text x="105.0" y="85.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">Cy</text><rect x="140" y="72" width="70" height="18" fill="none" stroke="#521000" stroke-width="1.0"/><text x="175.0" y="85.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">76</text></svg><figcaption>attached to /examples/csv-data · viewBox 212×96</figcaption><p class="score-line">v2 scores: csv-data 9.0</p></figure><figure><h3>warning-signal</h3><svg viewBox="-14 -14 320 108" width="512" height="173" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="22" width="90" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="45.0" y="38.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">code path</text><line x1="90" y1="22" x2="113.99754952001219" y2="7.6014702879926865" stroke="#521000" stroke-width="1.0"/><polygon points="120,4 115.43813763520926,10.002450479987811 112.55696140481511,5.200490095997563" fill="#521000"/><rect x="122" y="0" width="170" height="22" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="207.0" y="15.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">DeprecationWarning</text><line x1="90" y1="46" x2="113.3592169136464" y2="53.78640563788213" 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xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="90" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="45.0" y="14.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">capture</text><rect x="92" y="0" width="180" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="182.0" y="14.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">[x, y]</text><rect x="0" y="22" width="90" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="45.0" y="36.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">alternative</text><rect x="92" y="22" width="180" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="182.0" y="36.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">P() | Q()</text><rect x="0" y="44" width="90" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="45.0" y="58.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">guard</text><rect x="92" y="44" width="180" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="182.0" y="58.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">[x] if x &gt; 0</text><rect x="0" y="66" width="90" height="20" fill="none" stroke="#521000" stroke-width="1.0"/><text x="45.0" y="80.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">class</text><rect x="92" y="66" width="180" height="20" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="182.0" y="80.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">Point(x=0, y=_)</text></svg><figcaption>attached to /examples/advanced-match-patterns · viewBox 272×96</figcaption><p class="score-line">v2 scores: advanced-match-patterns 9.0</p></figure><figure><h3>loop-else-gate</h3><svg viewBox="-14 -14 340 104" width="544" height="166" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="20" width="110" height="24" fill="none" stroke="#521000" stroke-width="1.0"/><text x="55.0" y="36.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">loop body</text><line x1="110" y1="20" x2="143.7390096630006" y2="3.1304951684997055" stroke="#FF4801" stroke-width="1.4"/><polygon points="150,0 144.99120773040048,5.63489130329947 142.4868115956007,0.6260990336999415" fill="#FF4801"/><rect x="152" y="0" width="160" height="20" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="232.0" y="14.0" 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text-anchor="middle">{1, 2, 3}</text></svg><figcaption>attached to /examples/literals · viewBox 252×132</figcaption><p class="score-line">v2 scores: literals 9.0</p></figure><figure><h3>function-with-body</h3><svg viewBox="-14 -14 362 96" width="579" height="154" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><line x1="0" y1="36" x2="23.0" y2="36.0" stroke="#521000" stroke-width="1.0"/><polygon points="30,36 23.0,38.8 23.0,33.2" fill="#521000"/><text x="15" y="28" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="9" fill="rgba(82, 16, 0, 0.7)" text-anchor="middle">name</text><rect x="32" y="18" width="150" height="44" fill="none" stroke="#521000" stroke-width="1.0"/><text x="38" y="15" font-family="-apple-system, 'Source Sans Pro', sans-serif" font-size="8" fill="rgba(82, 16, 0, 0.7)" text-anchor="start" letter-spacing="0.5">DEF GREET(NAME):</text><text x="107" y="44" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">"Hello, " + name</text><line x1="182" y1="36" x2="205.0" y2="36.0" stroke="#FF4801" stroke-width="1.4"/><polygon points="212,36 205.0,38.8 205.0,33.2" fill="#FF4801"/><rect x="214" y="24" width="120" height="24" fill="rgba(82, 16, 0, 0.05)" stroke="#521000" stroke-width="1.0"/><text x="274.0" y="40.0" font-family="'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace" font-size="10" fill="#521000" text-anchor="middle">"Hello, Ada"</text></svg><figcaption>attached to /examples/functions · viewBox 334×68</figcaption><p class="score-line">v2 scores: functions 9.0</p></figure></div>
+  <div class="section-grid"><figure><h3>value-type-lookup</h3><svg viewBox="-14 -14 308 108" width="493" height="173" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="34.0" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="50.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">text</text><rect x="88" y="30" width="80" height="32" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="92" y="25" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">STR</text><text x="128.0" y="50.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="48" lengthAdjust="spacing">"python"</text><line x1="62" y1="46.0" x2="79.0" y2="46.0" 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stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="116" y1="22" x2="116" y2="28" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="20" y1="22" x2="116" y2="22" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><text x="68.0" y="18" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">[:3]</text><line x1="116" y1="92" x2="116" y2="86" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="212" y1="92" x2="212" y2="86" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="116" y1="92" x2="212" y2="92" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><text x="164.0" y="104" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">[3:]</text></svg><figcaption>attached to /examples/slices · viewBox 232×120</figcaption><p 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lengthAdjust="spacing">case B</text></svg><figcaption>attached to /examples/conditionals · viewBox 232×100</figcaption><p class="score-line">v2 scores: conditionals 9.0</p></figure><figure><h3>loop-repetition</h3><svg viewBox="-14 -14 288 128" width="461" height="205" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="8" width="70" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="35.0" y="23.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="18" lengthAdjust="spacing">for</text><line x1="70" y1="19" x2="97.0" y2="19.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="104,19 97.0,21.8 97.0,16.2" fill="var(--fig-ink)"/><rect x="106" y="8" width="150" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="181.0" y="23.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" 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font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">message</text><rect x="88" y="6" width="70" height="32" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="92" y="1" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">STR</text><text x="123.0" y="26.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">"hi"</text><line x1="62" y1="22.0" x2="79.0" y2="22.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,22.0 79.0,24.8 79.0,19.2" fill="var(--fig-ink)"/></svg><figcaption>attached to /examples/variables · viewBox 170×44</figcaption><p class="score-line">v2 scores: variables 9.5</p></figure><figure><h3>constants-bind</h3><svg viewBox="-14 -14 222 72" width="355" height="115" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="10.0" width="84" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="42.0" y="26.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">MAX_RETRIES</text><rect x="112" y="6" width="70" height="32" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="116" y="1" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">INT</text><text x="147.0" y="26.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">3</text><line x1="86" y1="22.0" x2="103.0" y2="22.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="110,22.0 103.0,24.8 103.0,19.2" fill="var(--fig-ink)"/></svg><figcaption>attached to /examples/constants · viewBox 194×44</figcaption><p class="score-line">v2 scores: constants 9.0</p></figure><figure><h3>call-stack</h3><svg viewBox="-14 -14 320 108" width="512" height="173" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="104" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="52.0" y="15.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="66" lengthAdjust="spacing">total(tree)</text><rect x="104" y="0" width="92" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="150.0" y="15.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">value 1</text><text x="224" y="15" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" 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font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="72" lengthAdjust="spacing">total(child)</text><rect x="104" y="52" width="92" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="150.0" y="67.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="84" lengthAdjust="spacing">value 4 · leaf</text><text x="224" y="67" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="start">returns 4</text><line x1="208" y1="74" x2="208.0" y2="19.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="208,12 210.8,19.0 205.2,19.0" fill="var(--fig-accent)"/></svg><figcaption>attached to /examples/recursion · viewBox 292×80</figcaption><p class="score-line">v2 scores: recursion 9.0</p></figure><figure><h3>decorator-rebind</h3><svg viewBox="-14 -14 260 138" width="416" height="221" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="12" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">BEFORE</text><rect x="0" y="22.0" width="60" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="30.0" y="38.0" font-family="'Iowan Old Style', Charter, Georgia, serif" font-size="11" fill="var(--fig-ink)" text-anchor="middle" font-style="italic">f</text><rect x="86" y="18" width="50" height="32" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="90" y="13" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">FN</text><text x="111.0" y="38.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" 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font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">wrapper</text><rect x="186" y="78" width="44" height="24" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="208.0" y="94.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="12" lengthAdjust="spacing">f₀</text><line x1="178" y1="90" x2="186" y2="90" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/></svg><figcaption>attached to /examples/decorators · viewBox 232×110</figcaption><p class="score-line">v2 scores: decorators 9.0</p></figure><figure><h3>mro-chain</h3><svg viewBox="-14 -14 228 180" width="365" height="288" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="80" y="0" width="40" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="0.5" 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lengthAdjust="spacing">C</text><line x1="60" y1="64" x2="96" y2="80" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><line x1="140" y1="64" x2="104" y2="80" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><rect x="80" y="80" width="40" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><text x="100" y="96" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">D</text><text x="0" y="118" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">MRO</text><rect x="0" y="124" width="36" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="18.0" y="139.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">D</text><rect x="36" y="124" width="36" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="54.0" y="139.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">B</text><rect x="72" y="124" width="36" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="90.0" y="139.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">C</text><rect x="108" y="124" width="36" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="126.0" y="139.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">A</text><rect x="144" y="124" width="56" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="172.0" y="139.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="36" lengthAdjust="spacing">object</text></svg><figcaption>attached to /examples/inheritance-and-super · viewBox 200×152</figcaption><p class="score-line">v2 scores: inheritance-and-super 9.0</p></figure><figure><h3>dataclass-fields</h3><svg viewBox="-14 -14 340 104" width="544" height="166" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="12" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">DECLARATION</text><rect x="0" y="18" width="110" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="55.0" y="32.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" 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x="0" y="78" width="80" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="40.0" y="92.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="36" lengthAdjust="spacing">1 · Cy</text><rect x="180" y="78" width="80" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="220.0" y="92.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">2 · Eve</text><line x1="80" y1="44" x2="180" y2="22" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="80" y1="88" x2="180" y2="44" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="80" y1="22" x2="180" y2="66" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="80" y1="66" x2="180" y2="88" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/></svg><figcaption>attached to /examples/sorting · viewBox 270×100</figcaption><p class="score-line">v2 scores: sorting 9.0</p></figure><figure><h3>kw-only-separator</h3><svg viewBox="-14 -14 228 84" width="365" height="134" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="18" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="start" textLength="138" lengthAdjust="spacing">def f(a, b, *, c, d): …</text><line x1="75.0" y1="22" x2="75.0" y2="38" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><text x="33" y="50" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">positional or kw</text><text x="120" y="50" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">keyword only</text></svg><figcaption>attached to /examples/keyword-only-arguments, positional-only-parameters · viewBox 200×56</figcaption><p class="score-line">v2 scores: keyword-only-arguments 9.0 · positional-only-parameters 9.0</p></figure><figure><h3>positional-only-separator</h3><svg viewBox="-14 -14 228 84" width="365" height="134" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="18" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="start" textLength="138" lengthAdjust="spacing">def f(a, b, /, c, d): …</text><line x1="75.0" y1="22" x2="75.0" y2="38" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><text x="33" y="50" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">positional only</text><text x="120" y="50" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">positional or kw</text></svg><figcaption>attached to /examples/positional-only-parameters · viewBox 200×56</figcaption><p class="score-line">v2 scores: positional-only-parameters 9.0</p></figure><figure><h3>generator-resume</h3><svg viewBox="-14 -14 346 100" width="554" height="160" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="60" y="8" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">yield</text><text x="126" y="8" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">yield</text><text x="192" y="8" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">yield</text><rect x="0" y="14" width="60" height="22" fill="var(--fig-soft)" stroke="none"/><rect x="0" y="14" width="224" height="22" 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sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="start">next() → 2 · n=2</text></svg><figcaption>attached to /examples/generators · viewBox 318×72</figcaption><p class="score-line">v2 scores: generators 9.5</p></figure><figure><h3>truth-and-size</h3><svg viewBox="-14 -14 260 98" width="416" height="157" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="22" width="40" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="20.0" y="38.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">x</text><line x1="40" y1="34" x2="63.0" y2="34.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="70,34 63.0,36.8 63.0,31.2" fill="var(--fig-accent)"/><rect x="72" y="0" width="160" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="152.0" y="15.0" font-family="ui-monospace, 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lengthAdjust="spacing">__call__</text><line x1="100" y1="22" x2="131.0" y2="22.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="138,22 131.0,24.8 131.0,19.2" fill="var(--fig-accent)"/><rect x="140" y="10" width="80" height="24" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="180.0" y="26.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="48" lengthAdjust="spacing">obj(...)</text></svg><figcaption>attached to /examples/callable-objects · viewBox 220×44</figcaption><p class="score-line">v2 scores: callable-objects 9.0</p></figure><figure><h3>attribute-lookup</h3><svg viewBox="-14 -14 270 98" width="432" height="157" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="22" width="70" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="35.0" y="38.0" font-family="ui-monospace, SFMono-Regular, 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stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><text x="172.0" y="59.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="66" lengthAdjust="spacing">__getattr__</text></svg><figcaption>attached to /examples/attribute-access · viewBox 242×70</figcaption><p class="score-line">v2 scores: attribute-access 9.0</p></figure><figure><h3>guard-clauses</h3><svg viewBox="-14 -14 292 132" width="467" height="211" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="180" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="90.0" y="15.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="120" lengthAdjust="spacing">if not valid: return</text><rect x="0" y="24" width="180" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="90.0" y="39.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="138" lengthAdjust="spacing">if missing: return None</text><rect x="0" y="48" width="180" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="90.0" y="63.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="150" lengthAdjust="spacing">if special_case: return X</text><rect x="0" y="78" width="180" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="90.0" y="93.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="66" lengthAdjust="spacing">main work …</text><line x1="190" y1="11" x2="213.0" y2="11.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="220,11 213.0,13.8 213.0,8.2" fill="var(--fig-ink)"/><line x1="190" y1="35" x2="213.0" y2="35.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="220,35 213.0,37.8 213.0,32.2" fill="var(--fig-ink)"/><line x1="190" y1="59" x2="213.0" y2="59.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="220,59 213.0,61.8 213.0,56.2" fill="var(--fig-ink)"/><text x="222" y="38" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="start">exit</text></svg><figcaption>attached to /examples/guard-clauses · viewBox 264×104</figcaption><p class="score-line">v2 scores: guard-clauses 9.0</p></figure><figure><h3>bytes-vs-bytearray</h3><svg viewBox="-14 -14 228 118" width="365" height="189" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="4" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">BYTES — FROZEN</text><rect x="0" y="12" width="44" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="22.0" y="27.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">0x70</text><rect x="44" y="12" width="44" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="66.0" y="27.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">0x79</text><text x="98" y="27" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="start">b"py"</text><text x="0" y="48" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">BYTEARRAY — MUTABLE</text><polygon points="22,61 18,55 26,55" fill="var(--fig-accent)"/><rect x="0" y="62" width="44" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="22.0" y="77.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">0x50</text><rect x="44" y="62" width="44" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="66.0" y="77.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">0x79</text><text x="98" y="70" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="start">packet[0] = ord("P")</text><text x="98" y="84" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="start">bytearray(b'Py')</text></svg><figcaption>attached to /examples/bytes-and-bytearray · viewBox 200×90</figcaption><p class="score-line">v2 scores: bytes-and-bytearray 9.5</p></figure><figure><h3>sentinel-iteration</h3><svg viewBox="-14 -14 358 98" width="573" height="157" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="22" width="140" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="70.0" y="38.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="120" lengthAdjust="spacing">iter(read_chunk, "")</text><line x1="140" y1="34" x2="165.0" y2="34.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="172,34 165.0,36.8 165.0,31.2" fill="var(--fig-accent)"/><rect x="174" y="0" width="70" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="209.0" y="14.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">"py"</text><rect x="174" y="22" width="70" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="209.0" y="36.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="36" lengthAdjust="spacing">"thon"</text><rect x="174" y="44" width="70" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="0.5" opacity="0.4"/><text x="209.0" y="58.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="12" lengthAdjust="spacing">""</text><text x="250" y="58" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="start">sentinel · stop</text></svg><figcaption>attached to /examples/sentinel-iteration · viewBox 330×70</figcaption><p class="score-line">v2 scores: sentinel-iteration 9.0</p></figure><figure><h3>partial-functions</h3><svg viewBox="-14 -14 362 64" width="579" height="102" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="12" width="100" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="50.0" y="28.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="60" lengthAdjust="spacing">f(a, b, c)</text><line x1="100" y1="24" x2="123.0" y2="24.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="130,24 123.0,26.8 123.0,21.2" fill="var(--fig-accent)"/><rect x="132" y="0" width="100" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="182.0" y="16.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="78" lengthAdjust="spacing">partial(f, 1)</text><line x1="232" y1="24" x2="255.0" y2="24.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="262,24 255.0,26.8 255.0,21.2" fill="var(--fig-ink)"/><rect x="264" y="12" width="70" height="24" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="299.0" y="28.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">g(b, c)</text></svg><figcaption>attached to /examples/partial-functions · viewBox 334×36</figcaption><p class="score-line">v2 scores: partial-functions 9.0</p></figure><figure><h3>args-kwargs</h3><svg viewBox="-14 -14 308 96" width="493" height="154" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="20" y="22" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="start" textLength="150" lengthAdjust="spacing">def f(*args, **kwargs): …</text><line x1="71.0" y1="26" x2="71.0" y2="44" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="122.0" y1="26" x2="122.0" y2="44" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><text x="71.0" y="56" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">→ tuple</text><text x="122.0" y="56" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">→ dict</text></svg><figcaption>attached to /examples/args-and-kwargs · viewBox 280×68</figcaption><p class="score-line">v2 scores: args-and-kwargs 9.0</p></figure><figure><h3>multiple-return</h3><svg viewBox="-14 -14 208 148" width="333" height="237" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="180" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="90.0" y="16.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="120" lengthAdjust="spacing">def f(): return a, b</text><line x1="90" y1="26" x2="90.0" y2="41.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="90,48 87.2,41.0 92.8,41.0" fill="var(--fig-accent)"/><rect x="58" y="48" width="64" height="22" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="90.0" y="63.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="36" lengthAdjust="spacing">(a, b)</text><line x1="90" y1="72" x2="90.0" y2="87.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="90,94 87.2,87.0 92.8,87.0" fill="var(--fig-ink)"/><rect x="50" y="94" width="80" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="90.0" y="109.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">x, y</text></svg><figcaption>attached to /examples/multiple-return-values · viewBox 180×120</figcaption><p class="score-line">v2 scores: multiple-return-values 9.0</p></figure><figure><h3>lambda-expression</h3><svg viewBox="-14 -14 198 104" width="317" height="166" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="170" height="28" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="85.0" y="18.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="90" lengthAdjust="spacing">lambda x: x + 1</text><line x1="40" y1="28" x2="40" y2="50" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><line x1="120" y1="28" x2="120" y2="50" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><text x="40" y="62" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">params</text><text x="120" y="62" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">expression</text></svg><figcaption>attached to /examples/lambdas · viewBox 170×76</figcaption><p class="score-line">v2 scores: lambdas 9.0</p></figure><figure><h3>property-fork</h3><svg viewBox="-14 -14 260 100" width="416" height="160" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="22" width="70" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="35.0" y="38.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="30" lengthAdjust="spacing">obj.x</text><line x1="70" y1="22" x2="103.61654946377425" y2="6.872552741301585" 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textLength="48" lengthAdjust="spacing">__dict__</text></svg><figcaption>attached to /examples/properties · viewBox 232×72</figcaption><p class="score-line">v2 scores: properties 9.0</p></figure><figure><h3>metaclass-triangle</h3><svg viewBox="-14 -14 328 88" width="525" height="141" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><circle cx="20" cy="28" r="2.5" fill="var(--fig-ink)"/><text x="20" y="54" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">instance</text><line x1="26" y1="28" x2="79.0" y2="28.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="86,28 79.0,30.8 79.0,25.2" fill="var(--fig-ink)"/><rect x="88" y="10" width="60" height="36" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="94" y="7" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">CLASS</text><text x="118" y="32" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="30" lengthAdjust="spacing">Class</text><line x1="148" y1="28" x2="201.0" y2="28.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="208,28 201.0,30.8 201.0,25.2" fill="var(--fig-ink)"/><rect x="210" y="10" width="80" height="36" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="216" y="7" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">METACLASS</text><text x="250.0" y="32" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="24" lengthAdjust="spacing">type</text></svg><figcaption>attached to /examples/metaclasses · viewBox 300×60</figcaption><p class="score-line">v2 scores: metaclasses 9.0</p></figure><figure><h3>sys-path-resolution</h3><svg viewBox="-14 -14 286 128" width="458" height="205" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="4" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">SYS.PATH</text><rect x="0" y="14" width="120" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="60.0" y="28.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="18" lengthAdjust="spacing">cwd</text><rect x="0" y="34" width="120" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="60.0" y="48.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="78" lengthAdjust="spacing">site-packages</text><rect x="0" y="54" width="120" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="60.0" y="68.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="36" lengthAdjust="spacing">stdlib</text><rect x="0" y="74" width="120" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="60.0" y="88.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="6" lengthAdjust="spacing">…</text><line x1="120" y1="46" x2="149.0" y2="46.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="156,46 149.0,48.8 149.0,43.2" fill="var(--fig-accent)"/><text x="145" y="30" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">first hit</text><rect x="158" y="34" width="100" height="24" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="208.0" y="50.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="48" lengthAdjust="spacing">mymod.py</text></svg><figcaption>attached to /examples/modules · viewBox 258×100</figcaption><p class="score-line">v2 scores: modules 9.0</p></figure><figure><h3>import-alias</h3><svg viewBox="-14 -14 240 84" width="384" height="134" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><text x="0" y="8" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="start" textLength="108" lengthAdjust="spacing">import numpy as np</text><rect x="0" y="24" width="40" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="20.0" y="39.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="12" 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9.0</p></figure><figure><h3>json-python-mapping</h3><svg viewBox="-14 -14 248 144" width="397" height="230" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><line x1="120" y1="0" x2="120" y2="110" stroke="var(--fig-ink)" stroke-width="0.6"/><text x="60" y="4" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="middle" letter-spacing="0.5">JSON</text><text x="180" y="4" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="middle" letter-spacing="0.5">PYTHON</text><text x="0" y="24" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="start" textLength="36" lengthAdjust="spacing">object</text><text x="132" y="24" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="start" textLength="24" 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stroke-width="0.6"/><line x1="360" y1="36" x2="370" y2="36" stroke="var(--fig-ink)" stroke-width="0.6"/><text x="0" y="62" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">THIS CELL</text><text x="0" y="76" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="start" textLength="78" lengthAdjust="spacing">{score:05.1f}</text></svg><figcaption>attached to /examples/string-formatting · viewBox 372×82</figcaption><p class="score-line">v2 scores: string-formatting 9.0</p></figure><figure><h3>truthy-check</h3><svg viewBox="-14 -14 268 98" width="429" height="157" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="40" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="20.0" y="16.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" 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text-anchor="start" letter-spacing="0.5">INNER</text><rect x="100" y="56" width="80" height="24" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><line x1="124" y1="56" x2="124" y2="80" stroke="var(--fig-accent)" stroke-width="1.4"/><line x1="152" y1="56" x2="152" y2="80" stroke="var(--fig-accent)" stroke-width="1.4"/><line x1="140" y1="56" x2="140" y2="34" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/></svg><figcaption>attached to /examples/yield-from · viewBox 240×84</figcaption><p class="score-line">v2 scores: yield-from 9.0</p></figure><figure><h3>itertools-chain</h3><svg viewBox="-14 -14 274 110" width="438" height="176" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="14" width="70" height="24" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="4" y="9" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" 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to /examples/type-aliases · viewBox 240×104</figcaption><p class="score-line">v2 scores: type-aliases 9.0</p></figure><figure><h3>match-dispatch-ladder</h3><svg viewBox="-14 -14 288 158" width="461" height="253" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="170" height="22" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="85.0" y="15.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="66" lengthAdjust="spacing">match value</text><rect x="0" y="30" width="170" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="85.0" y="44.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">case 0:</text><rect x="0" y="52" width="170" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="85.0" y="66.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="72" lengthAdjust="spacing">case [x, y]:</text><rect x="0" y="74" width="170" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="85.0" y="88.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="102" lengthAdjust="spacing">case Point(0, _):</text><rect x="0" y="96" width="170" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="85.0" y="110.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">case _:</text><line x1="186" y1="32" x2="186" y2="104" stroke="var(--fig-ink)" stroke-width="0.6" stroke-dasharray="2 2"/><circle cx="186" cy="74" r="2.5" fill="var(--fig-ink)"/><line x1="186" y1="104" x2="186.0" y2="117.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="186,124 183.2,117.0 188.8,117.0" fill="var(--fig-accent)"/><text x="196" y="76" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="start">first match</text></svg><figcaption>attached to /examples/match-statements · viewBox 260×130</figcaption><p class="score-line">v2 scores: match-statements 9.0</p></figure><figure><h3>match-pattern-variants</h3><svg viewBox="-14 -14 300 124" width="480" height="198" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="90" height="20" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="45.0" y="14.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="42" lengthAdjust="spacing">capture</text><rect x="92" y="0" 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/examples/loop-else · viewBox 312×76</figcaption><p class="score-line">v2 scores: loop-else 9.0</p></figure><figure><h3>function-with-body</h3><svg viewBox="-14 -14 362 96" width="579" height="154" aria-hidden="true" focusable="false" xmlns="http://www.w3.org/2000/svg"><line x1="0" y1="36" x2="23.0" y2="36.0" stroke="var(--fig-ink)" stroke-width="1.0"/><polygon points="30,36 23.0,38.8 23.0,33.2" fill="var(--fig-ink)"/><text x="15" y="28" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="9" fill="var(--fig-ink-soft)" text-anchor="middle">name</text><rect x="32" y="18" width="150" height="44" fill="none" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="38" y="15" font-family="system-ui, -apple-system, 'Segoe UI', sans-serif" font-size="8" fill="var(--fig-ink-soft)" text-anchor="start" letter-spacing="0.5">DEF GREET(NAME):</text><text x="107" y="44" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="96" lengthAdjust="spacing">"Hello, " + name</text><line x1="182" y1="36" x2="205.0" y2="36.0" stroke="var(--fig-accent)" stroke-width="1.4"/><polygon points="212,36 205.0,38.8 205.0,33.2" fill="var(--fig-accent)"/><rect x="214" y="24" width="120" height="24" fill="var(--fig-soft)" stroke="var(--fig-ink)" stroke-width="1.0"/><text x="274.0" y="40.0" font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace" font-size="10" fill="var(--fig-ink)" text-anchor="middle" textLength="72" lengthAdjust="spacing">"Hello, Ada"</text></svg><figcaption>attached to /examples/functions · viewBox 334×68</figcaption><p class="score-line">v2 scores: functions 9.0</p></figure></div>
 </article>
 
 </body>
diff --git a/public/site.07c59ae07f87.css b/public/site.32ce5906d3c1.css
similarity index 94%
rename from public/site.07c59ae07f87.css
rename to public/site.32ce5906d3c1.css
index 088a60c..960f7ad 100644
--- a/public/site.07c59ae07f87.css
+++ b/public/site.32ce5906d3c1.css
@@ -1,4 +1,4 @@
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+:root { color-scheme: light; --accent: #FF4801; --accent-text: #C83800; --accent-action: #C83800; --accent-hover: #FF7038; --accent-soft: rgba(255, 72, 1, 0.08); --text: #521000; --muted: rgba(82, 16, 0, 0.7); --page: #F5F1EB; --surface: #FFFBF5; --surface-2: #FFFDFB; --surface-3: #FEF7ED; --hairline: #EBD5C1; --hairline-soft: rgba(235, 213, 193, 0.5); --header-veil: rgba(245, 241, 235, 0.82); --header-veil-0: rgba(245, 241, 235, 0); --header-veil-solid: rgba(245, 241, 235, 0.95); --fig-ink: #521000; --fig-ink-soft: rgba(82, 16, 0, 0.7); --fig-accent: #FF4801; --fig-soft: rgba(82, 16, 0, 0.05); --terminal-bg: #0b1020; --terminal-ink: #f9fafb; --space-1: .5rem; --space-2: .75rem; --space-3: 1rem; --space-4: 1.5rem; --space-5: 2rem; --space-6: 3rem; }
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@@ -216,17 +216,23 @@
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+    .cell-banner svg { max-width: 100%; height: auto; display: block; align-self: end; }
+    .cell-banner figcaption { align-self: start; margin-top: var(--space-2); color: var(--muted); font-size: .92rem; font-style: italic; max-width: 44ch; }
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-       mode each SVG sits on a light "paper" chip instead of being
-       recoloured — the grammar stays untouched. Shiki emits dual-theme
-       CSS variables; the swap below activates the dark set. */
+       Marginalia figures paint with the --fig-* tokens, so redefining
+       them here recolours every figure with the page: no light chip, no
+       second palette in the grammar. The values mirror
+       FIGURE_TOKENS_DARK in src/marginalia_grammar.py (a contract keeps
+       them equal). Shiki emits dual-theme CSS variables; the swap below
+       activates the dark set. */
     @media (prefers-color-scheme: dark) {
       :root {
         color-scheme: dark;
@@ -237,6 +243,10 @@
         --accent-soft: rgba(255, 107, 46, 0.14);
         --text: #F3E7DC;
         --muted: rgba(243, 231, 220, 0.72);
+        --fig-ink: #F3E7DC;
+        --fig-ink-soft: rgba(243, 231, 220, 0.72);
+        --fig-accent: #FF6B2E;
+        --fig-soft: rgba(243, 231, 220, 0.07);
         --page: #1B120B;
         --surface: #241810;
         --surface-2: #281B12;
@@ -247,7 +257,6 @@
         --header-veil-0: rgba(27, 18, 11, 0);
         --header-veil-solid: rgba(27, 18, 11, 0.95);
       }
-      .cell-banner figure svg, .journey-section-figure svg { padding: var(--space-2); border-radius: .5rem; background: var(--figure-paper); }
       .button { color: #2A0B00; }
     }
     /* Non-motion accessibility signals. Reduced motion is handled by
diff --git a/public/site.css b/public/site.css
index 088a60c..960f7ad 100644
--- a/public/site.css
+++ b/public/site.css
@@ -1,4 +1,4 @@
-:root { color-scheme: light; --accent: #FF4801; --accent-text: #C83800; --accent-action: #C83800; --accent-hover: #FF7038; --accent-soft: rgba(255, 72, 1, 0.08); --text: #521000; --muted: rgba(82, 16, 0, 0.7); --page: #F5F1EB; --surface: #FFFBF5; --surface-2: #FFFDFB; --surface-3: #FEF7ED; --hairline: #EBD5C1; --hairline-soft: rgba(235, 213, 193, 0.5); --header-veil: rgba(245, 241, 235, 0.82); --header-veil-0: rgba(245, 241, 235, 0); --header-veil-solid: rgba(245, 241, 235, 0.95); --figure-paper: #F5F1EB; --terminal-bg: #0b1020; --terminal-ink: #f9fafb; --space-1: .5rem; --space-2: .75rem; --space-3: 1rem; --space-4: 1.5rem; --space-5: 2rem; --space-6: 3rem; }
+:root { color-scheme: light; --accent: #FF4801; --accent-text: #C83800; --accent-action: #C83800; --accent-hover: #FF7038; --accent-soft: rgba(255, 72, 1, 0.08); --text: #521000; --muted: rgba(82, 16, 0, 0.7); --page: #F5F1EB; --surface: #FFFBF5; --surface-2: #FFFDFB; --surface-3: #FEF7ED; --hairline: #EBD5C1; --hairline-soft: rgba(235, 213, 193, 0.5); --header-veil: rgba(245, 241, 235, 0.82); --header-veil-0: rgba(245, 241, 235, 0); --header-veil-solid: rgba(245, 241, 235, 0.95); --fig-ink: #521000; --fig-ink-soft: rgba(82, 16, 0, 0.7); --fig-accent: #FF4801; --fig-soft: rgba(82, 16, 0, 0.05); --terminal-bg: #0b1020; --terminal-ink: #f9fafb; --space-1: .5rem; --space-2: .75rem; --space-3: 1rem; --space-4: 1.5rem; --space-5: 2rem; --space-6: 3rem; }
     * { box-sizing: border-box; }
     html { -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
     :where(a, button, input, textarea, [tabindex]):focus-visible { outline: 3px solid var(--accent-text); outline-offset: 3px; }
@@ -216,17 +216,23 @@
        keep their prose|code 2-column grid; banners between cells hold
        one or many figures (small multiples). See docs/visual-explainer-spec.md. */
     .cell-banner { margin: var(--space-5) 0; padding: var(--space-4) 0; border-block: 1px dashed var(--hairline-soft); display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: var(--space-4); justify-items: center; }
-    .cell-banner figure { margin: 0; padding: 0; width: 100%; max-width: clamp(240px, 45vw, 480px); }
-    .cell-banner svg { max-width: 100%; height: auto; display: block; }
-    .cell-banner figcaption { margin-top: var(--space-2); color: var(--muted); font-size: .92rem; font-style: italic; max-width: 44ch; }
+    /* Each figure is a two-row subgrid (drawing, caption) so a pair of
+       small multiples shares one baseline: drawings bottom-align in row
+       one and both captions start on the same line in row two, even
+       when one drawing is taller. */
+    .cell-banner figure { display: grid; grid-template-rows: subgrid; grid-row: span 2; justify-items: center; margin: 0; padding: 0; width: 100%; max-width: clamp(240px, 45vw, 480px); }
+    .cell-banner svg { max-width: 100%; height: auto; display: block; align-self: end; }
+    .cell-banner figcaption { align-self: start; margin-top: var(--space-2); color: var(--muted); font-size: .92rem; font-style: italic; max-width: 44ch; }
     .cell-banner--1 { margin-block: var(--space-6); }
     .cell-banner--1 figure { width: 100%; max-width: clamp(280px, 65vw, 640px); }
     .cell-banner--1 figcaption { max-width: 42ch; }
     /* Dark palette: same warm hue family as the light theme, inverted.
-       Marginalia figures keep their locked light palette, so in dark
-       mode each SVG sits on a light "paper" chip instead of being
-       recoloured — the grammar stays untouched. Shiki emits dual-theme
-       CSS variables; the swap below activates the dark set. */
+       Marginalia figures paint with the --fig-* tokens, so redefining
+       them here recolours every figure with the page: no light chip, no
+       second palette in the grammar. The values mirror
+       FIGURE_TOKENS_DARK in src/marginalia_grammar.py (a contract keeps
+       them equal). Shiki emits dual-theme CSS variables; the swap below
+       activates the dark set. */
     @media (prefers-color-scheme: dark) {
       :root {
         color-scheme: dark;
@@ -237,6 +243,10 @@
         --accent-soft: rgba(255, 107, 46, 0.14);
         --text: #F3E7DC;
         --muted: rgba(243, 231, 220, 0.72);
+        --fig-ink: #F3E7DC;
+        --fig-ink-soft: rgba(243, 231, 220, 0.72);
+        --fig-accent: #FF6B2E;
+        --fig-soft: rgba(243, 231, 220, 0.07);
         --page: #1B120B;
         --surface: #241810;
         --surface-2: #281B12;
@@ -247,7 +257,6 @@
         --header-veil-0: rgba(27, 18, 11, 0);
         --header-veil-solid: rgba(27, 18, 11, 0.95);
       }
-      .cell-banner figure svg, .journey-section-figure svg { padding: var(--space-2); border-radius: .5rem; background: var(--figure-paper); }
       .button { color: #2A0B00; }
     }
     /* Non-motion accessibility signals. Reduced motion is handled by
diff --git a/scripts/build_figure_contact_sheet.py b/scripts/build_figure_contact_sheet.py
new file mode 100755
index 0000000..b0209f6
--- /dev/null
+++ b/scripts/build_figure_contact_sheet.py
@@ -0,0 +1,208 @@
+#!/usr/bin/env python3
+"""Render a before/after contact sheet of every figure a branch changed.
+
+Reviewer tooling for figure pull requests. The script extracts the base
+revision's ``src/`` and registry with ``git archive``, renders every
+attached example figure and journey-section figure from both trees,
+and keeps the ones whose drawing differs once colour, font and
+text-length attributes are ignored (those change for every figure when
+the palette moves, and are not what a reviewer needs to compare). Rows
+are grouped so the reviewer's attention goes where it is needed:
+"redrawn" rows need judgement, "adjusted" rows (an arrow lengthened, an
+accent removed) need only a glance, "removed" rows show a page that lost
+its figure. Each row shows the base drawing beside the head drawing with
+its caption and element count, so "is the new figure busier?" is
+answered by a number as well as a picture. Pass --notes to print a
+one-line reason under each row.
+
+    uv run --python 3.13 scripts/build_figure_contact_sheet.py --base main \\
+        --output docs/pr-evidence/diagram-upgrade-contact-sheet
+
+writes a light and a dark PNG captured from a ``build/`` HTML page through
+``scripts/capture_browser_screenshot.mjs``. In dark mode the base column
+sits on the light paper chip the site used to draw, so both columns show
+what a reader actually saw.
+"""
+from __future__ import annotations
+
+import argparse
+import html
+import json
+import os
+import re
+import subprocess
+import sys
+import tempfile
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[1]
+sys.path.insert(0, str(ROOT))
+
+DUMP = r"""
+import json, sys
+sys.path.insert(0, sys.argv[1])
+from src.marginalia import ATTACHMENTS, FIGURES, SECTION_FIGURES, _render_svg
+rows = {}
+for slug, items in ATTACHMENTS.items():
+    rows[f"example · {slug}"] = [
+        {"figure": name, "caption": caption or "", "svg": _render_svg(name)} for _anchor, name, caption in items
+    ]
+for section, (name, caption) in SECTION_FIGURES.items():
+    rows[f"journey section · {section}"] = [{"figure": name, "caption": caption, "svg": _render_svg(name)}]
+print(json.dumps(rows))
+"""
+
+STRIP = re.compile(r'\s(?:fill|stroke|font-family|textLength|lengthAdjust)="[^"]*"')
+ELEMENT = re.compile(r"<(?:rect|text|line|circle|path|polygon)\b")
+
+
+def dump(tree: Path) -> dict[str, list[dict[str, str]]]:
+    out = subprocess.run(
+        [sys.executable, "-c", DUMP, str(tree)], capture_output=True, text=True, check=True, cwd=tree
+    )
+    return json.loads(out.stdout)
+
+
+def extract(base: str) -> Path:
+    tree = Path(tempfile.mkdtemp(prefix="figure-sheet-base-"))
+    archive = subprocess.run(["git", "archive", base, "src", "docs/quality-registries.toml"], cwd=ROOT, capture_output=True, check=True)
+    subprocess.run(["tar", "-x", "-C", str(tree)], input=archive.stdout, check=True)
+    return tree
+
+
+def normalised(figures: list[dict[str, str]]) -> str:
+    return "|".join(STRIP.sub("", f["svg"]).replace(" ", "") for f in figures)
+
+
+LABEL = re.compile(r"<text[^>]*>([^<]*)</text>")
+
+
+def labels(figures: list[dict[str, str]]) -> list[str]:
+    return [m for f in figures for m in LABEL.findall(f["svg"])]
+
+
+def elements(figures: list[dict[str, str]]) -> int:
+    return sum(len(ELEMENT.findall(f["svg"])) for f in figures)
+
+
+def cell(figures: list[dict[str, str]], rationale: str | None) -> str:
+    if not figures:
+        note = f"<p class='caption'>{html.escape(rationale)}</p>" if rationale else ""
+        return f"<td class='none'><p class='eyebrow'>no figure</p>{note}</td>"
+    parts = []
+    for f in figures:
+        parts.append(
+            f"<figure>{f['svg']}<figcaption>{html.escape(f['caption'])}</figcaption></figure>"
+        )
+    names = " + ".join(html.escape(f["figure"]) for f in figures)
+    return f"<td><p class='eyebrow'>{names} · {elements(figures)} elements</p>{''.join(parts)}</td>"
+
+
+KINDS = (
+    ("redrawn", "Redrawn: a different figure, or the same figure with a different drawing. Judge these."),
+    ("adjusted", "Adjusted: the same drawing with an arrow lengthened or an accent removed. Spot the difference."),
+    ("removed", "Removed: the page no longer carries a figure."),
+)
+
+
+def kind(before: list[dict[str, str]], after: list[dict[str, str]]) -> str:
+    if not after:
+        return "removed"
+    if not before:
+        return "redrawn"
+    same_names = [f["figure"] for f in before] == [f["figure"] for f in after]
+    same_labels = labels(before) == labels(after)
+    if same_names and same_labels and abs(elements(before) - elements(after)) <= 2:
+        return "adjusted"
+    return "redrawn"
+
+
+def render(base: str, before: dict, after: dict, rationales: dict[str, str], notes: dict[str, str]) -> str:
+    from src.marginalia_grammar import FIGURE_TOKENS_DARK, FIGURE_TOKENS_LIGHT, figure_token_css
+
+    grouped: dict[str, list[str]] = {name: [] for name, _ in KINDS}
+    for key in list(before) + [k for k in after if k not in before]:
+        b, a = before.get(key, []), after.get(key, [])
+        if normalised(b) == normalised(a):
+            continue
+        slug = key.split(" · ", 1)[1]
+        note = notes.get(key) or notes.get(slug) or ""
+        label = f"{html.escape(key)}" + (f"<p class='note'>{html.escape(note)}</p>" if note else "")
+        grouped[kind(b, a)].append(f"<tr><th>{label}</th>{cell(b, None)}{cell(a, rationales.get(slug))}</tr>")
+    sections = []
+    for name, blurb in KINDS:
+        if grouped[name]:
+            sections.append(
+                f"<tbody><tr class='group'><th colspan='3'><span>{name} · {len(grouped[name])}</span> {html.escape(blurb)}</th></tr>"
+                + "".join(grouped[name]) + "</tbody>"
+            )
+    rows = "".join(sections)
+    return f"""<!doctype html>
+<html lang="en"><head><meta charset="utf-8"><title>Figure contact sheet</title>
+<style>
+  :root {{ color-scheme: light dark; --paper: #F5F1EB; --ink: #521000; --muted: rgba(82,16,0,.7); --rule: #EBD5C1; --chip: transparent; {figure_token_css(FIGURE_TOKENS_LIGHT)} }}
+  @media (prefers-color-scheme: dark) {{ :root {{ --paper: #1B120B; --ink: #F3E7DC; --muted: rgba(243,231,220,.72); --rule: #43301F; --chip: #F5F1EB; {figure_token_css(FIGURE_TOKENS_DARK)} }} }}
+  body {{ margin: 0; background: var(--paper); color: var(--ink); font: 14px/1.5 system-ui, -apple-system, 'Segoe UI', sans-serif; }}
+  .sheet {{ width: 1460px; padding: 28px 32px 40px; box-sizing: border-box; }}
+  h1 {{ font-size: 22px; margin: 0 0 4px; }}
+  p.meta {{ margin: 0 0 20px; color: var(--muted); }}
+  table {{ border-collapse: collapse; width: 100%; table-layout: fixed; }}
+  th, td {{ vertical-align: top; text-align: left; padding: 16px 14px; border-top: 1px solid var(--rule); }}
+  thead th {{ border-top: 0; font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }}
+  tbody th {{ width: 200px; font-weight: 600; font-size: 13px; }}
+  tr.group th {{ padding-top: 28px; font-weight: 400; font-size: 13px; color: var(--muted); border-top: 2px solid var(--rule); }}
+  tr.group th span {{ font-weight: 700; color: var(--ink); text-transform: capitalize; }}
+  th .note {{ margin: 6px 0 0; font-weight: 400; font-size: 12px; color: var(--muted); }}
+  td.none {{ color: var(--muted); }}
+  .eyebrow {{ margin: 0 0 8px; font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }}
+  figure {{ margin: 0 0 10px; }}
+  svg {{ display: block; max-width: 100%; height: auto; }}
+  td:nth-child(2) svg {{ background: var(--chip); padding: 8px; border-radius: 6px; }}
+  figcaption, .caption {{ margin-top: 8px; font-style: italic; font-size: 13px; color: var(--muted); max-width: 52ch; }}
+</style></head><body><div class="sheet">
+<h1>Figures changed since <code>{html.escape(base)}</code></h1>
+<p class="meta">Left: the figure as rendered on <code>{html.escape(base)}</code> (in dark mode, on the light chip the site used to draw). Right: this branch. Element counts are drawable SVG elements; captions are the shipped figcaptions.</p>
+<table><thead><tr><th>page</th><th>before</th><th>after</th></tr></thead>
+{rows}
+</table></div></body></html>
+"""
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser(description=__doc__, formatter_class=argparse.RawDescriptionHelpFormatter)
+    parser.add_argument("--base", default="main")
+    parser.add_argument("--output", required=True, help="PNG path stem; writes <stem>-light.png and <stem>-dark.png")
+    parser.add_argument("--notes", help="JSON file mapping a row key (or slug) to a one-line note on what changed and why")
+    args = parser.parse_args()
+
+    before = dump(extract(args.base))
+    after = dump(ROOT)
+    from src.editorial_registry import load_registry
+
+    rationales = {slug: entry["reason"] for slug, entry in load_registry().get("no_figure_rationales", {}).items()}
+    stem = Path(args.output).resolve()
+    stem.parent.mkdir(parents=True, exist_ok=True)
+    page = ROOT / "build" / "figure-contact-sheet" / f"{stem.name}.html"
+    page.parent.mkdir(parents=True, exist_ok=True)
+    notes = json.loads(Path(args.notes).read_text()) if args.notes else {}
+    page.write_text(render(args.base, before, after, rationales, notes))
+    changed = sum(1 for k in set(before) | set(after) if normalised(before.get(k, [])) != normalised(after.get(k, [])))
+    print(f"wrote {page.relative_to(ROOT)} — {changed} changed figure rows")
+    for scheme in ("light", "dark"):
+        output = stem.parent / f"{stem.name}-{scheme}.png"
+        env = {
+            **os.environ,
+            "TARGET_URL": page.resolve().as_uri(),
+            "CAPTURE_SELECTOR": ".sheet",
+            "WIDTH": "1500",
+            "HEIGHT": "12000",
+            "COLOR_SCHEME": scheme,
+            "OUTPUT": str(output),
+        }
+        subprocess.run(["node", str(ROOT / "scripts" / "capture_browser_screenshot.mjs")], env=env, check=True, capture_output=True)
+        print(f"wrote {output.relative_to(ROOT)}")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())
diff --git a/scripts/build_marginalia.py b/scripts/build_marginalia.py
index e0a52c3..5362c47 100755
--- a/scripts/build_marginalia.py
+++ b/scripts/build_marginalia.py
@@ -19,7 +19,7 @@
 
 from _common import ROOT, load_catalog
 from src.marginalia import ATTACHMENTS, FIGURES, SCORES
-from src.marginalia_grammar import Card
+from src.marginalia_grammar import FIGURE_TOKENS_LIGHT, Card, figure_token_css
 
 OUT = ROOT / "public" / "prototyping" / "marginalia-gestalt.html"
 
@@ -76,6 +76,7 @@ def _example_cards() -> list[Card]:
     --ink: #521000;
     --ink-soft: rgba(82, 16, 0, 0.7);
     --rule: #EBD5C1;
+    __FIGURE_TOKENS__
   }
   *, *::before, *::after { box-sizing: border-box; }
   html, body { background: var(--paper); color: var(--ink); margin: 0; }
@@ -131,7 +132,7 @@ def _example_cards() -> list[Card]:
 
 
 def render() -> str:
-    out = [HEAD]
+    out = [HEAD.replace("__FIGURE_TOKENS__", figure_token_css(FIGURE_TOKENS_LIGHT))]
     out.append('<h2 class="section">Examples</h2>\n<div class="grid">')
     for card in EXAMPLES:
         out.append(card.render_html())
diff --git a/scripts/build_prototypes.py b/scripts/build_prototypes.py
index 0d49e44..d96f43d 100755
--- a/scripts/build_prototypes.py
+++ b/scripts/build_prototypes.py
@@ -1,10 +1,11 @@
 #!/usr/bin/env python3
 """Generate exploratory prototypes under public/prototyping/.
 
-The canonical layout is "figure between prose and code", with the cell
-dropping to single-column when a figure is attached. These prototypes
-demonstrate that layout on representative examples and journeys, plus
-keep the marginalia-gestalt and operators-comparison review pages.
+The production layout keeps every cell in its prose|code grid and places
+figures in banner rows between cells (docs/visual-explainer-spec.md).
+These prototypes demonstrate that layout with one, two and three figures
+per banner on representative examples and journeys, and build the
+gestalt review pages.
 """
 
 from __future__ import annotations
diff --git a/scripts/build_social_cards.py b/scripts/build_social_cards.py
index fb14aee..1606516 100755
--- a/scripts/build_social_cards.py
+++ b/scripts/build_social_cards.py
@@ -22,6 +22,7 @@
 
 from src.app import JOURNEYS, PYTHON_VERSION, list_examples
 from src.marginalia import render_first_figure
+from src.marginalia_grammar import FIGURE_TOKENS_LIGHT, figure_token_css
 
 CARD_DIR = ROOT / "build" / "social-cards"
 OUTPUT_DIR = ROOT / "public" / "og"
@@ -31,6 +32,7 @@
 PROVENANCE_VERSION = 1
 
 _CARD_CSS = """
+  :root { """ + figure_token_css(FIGURE_TOKENS_LIGHT) + """ }
   * { box-sizing: border-box; margin: 0; }
   body { width: 1200px; height: 630px; overflow: hidden; display: flex; align-items: stretch; gap: 48px; padding: 64px 72px; color: #521000; font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", \"DejaVu Sans\", sans-serif; background: radial-gradient(circle at top left, rgba(255, 72, 1, 0.12), transparent 40rem), #F5F1EB; }
   .copy { flex: 1.2; display: flex; flex-direction: column; min-width: 0; }
diff --git a/src/asset_manifest.py b/src/asset_manifest.py
index d242400..061c7c6 100644
--- a/src/asset_manifest.py
+++ b/src/asset_manifest.py
@@ -1,3 +1,3 @@
 # Generated by scripts/fingerprint_assets.py. Do not edit by hand.
-ASSET_PATHS = {'SITE_CSS': '/site.07c59ae07f87.css', 'SYNTAX_JS': '/syntax-highlight.743e2535f133.js', 'EDITOR_JS': '/editor.3659b44c8480.js', 'RUNNER_JS': '/runner.05ddb60aa9e7.js', 'SEARCH_JS': '/search.e5a5822d9917.js', 'SEARCH_INDEX': '/search-index.332712b2e502.json'}
-HTML_CACHE_VERSION = 'deed3f3ebbb1'
+ASSET_PATHS = {'SITE_CSS': '/site.32ce5906d3c1.css', 'SYNTAX_JS': '/syntax-highlight.743e2535f133.js', 'EDITOR_JS': '/editor.3659b44c8480.js', 'RUNNER_JS': '/runner.05ddb60aa9e7.js', 'SEARCH_JS': '/search.e5a5822d9917.js', 'SEARCH_INDEX': '/search-index.332712b2e502.json'}
+HTML_CACHE_VERSION = '93bb0fecab44'
diff --git a/src/editorial_registry_data.py b/src/editorial_registry_data.py
index 0b896f8..62f94aa 100644
--- a/src/editorial_registry_data.py
+++ b/src/editorial_registry_data.py
@@ -1,2 +1,2 @@
 # Generated by scripts/embed_editorial_registry.py. Do not edit by hand.
-REGISTRY_TOML = '# Quality and editorial registries.\n#\n# Source of truth for rubric checks, journey structure, edge labels,\n# figure attachments/captions, and curated scores. Executable paint\n# functions stay in `src/marginalia.py`; mutable editorial data lives here.\n\n[[confusable_pairs]]\nname = "__str__ vs __repr__"\nowner = "special-methods"\ntokens = ["__str__", "__repr__"]\n\n[[confusable_pairs]]\nname = "is vs =="\nowner = "equality-and-identity"\ntokens = [" is ", "=="]\n\n[[confusable_pairs]]\nname = "list vs tuple"\nowner = "tuples"\ntokens = ["list", "tuple"]\n\n[[confusable_pairs]]\nname = "classmethod vs staticmethod vs instance method"\nowner = "classmethods-and-staticmethods"\ntokens = ["@classmethod", "@staticmethod", "self"]\n\n[[confusable_pairs]]\nname = "isinstance vs type=="\nowner = "runtime-type-checks"\ntokens = ["isinstance(", "type("]\n\n[[confusable_pairs]]\nname = "generator vs class iterator"\nowner = "generators"\ntokens = ["yield", "__next__"]\n\n[[confusable_pairs]]\nname = "iterator vs iterable"\nowner = "iterator-vs-iterable"\ntokens = ["iterable", "iterator", "iter("]\n\n[[confusable_pairs]]\nname = "mutable vs immutable class attributes"\nowner = "classes"\ntokens = ["class attribute", "__init__"]\n\n[[confusable_pairs]]\nname = "eager vs lazy production"\nowner = "generators"\ntokens = ["return", "yield"]\n\n[[confusable_pairs]]\nname = "Protocol vs ABC"\nowner = "abstract-base-classes"\ntokens = ["Protocol", "ABC"]\n\n[[confusable_pairs]]\nname = "dataclass vs NamedTuple vs TypedDict"\nowner = "structured-data-shapes"\ntokens = ["@dataclass", "NamedTuple", "TypedDict"]\n\n[[confusable_pairs]]\nname = "bound vs unbound methods"\nowner = "bound-and-unbound-methods"\ntokens = ["bound method", "Class.method"]\n\n[[confusable_pairs]]\nname = "yield vs return"\nowner = "generators"\ntokens = ["yield", "return"]\n\n[[confusable_pairs]]\nname = "shallow vs deep copy"\nowner = "copying-collections"\ntokens = ["copy(", "deepcopy("]\n\n[[confusable_pairs]]\nname = "sync vs async functions"\nowner = "async-await"\ntokens = ["async def", "def "]\n\n[broad_surface_tours]\n\n[broad_surface_tours.special-methods]\nrequired_tokens = [\n  "__init__", "__repr__", "__str__", "__eq__", "__hash__", "__lt__",\n  "__len__", "__iter__", "__contains__", "__getitem__", "__setitem__",\n  "__call__", "__enter__", "__exit__", "__bool__",\n]\n\n[broad_surface_tours.operators]\nrequired_tokens = ["+", "==", " is ", " in ", "and", "or", "&", ":="]\n\n[broad_surface_tours.type-hints]\nrequired_tokens = ["list[", " | ", "Optional", "TypeAlias"]\n\n[broad_surface_tours.testing]\nrequired_tokens = ["TestCase", "assertEqual", "assertRaises", "setUp"]\n\n[broad_surface_tours.async-await]\nrequired_tokens = ["async def", "await", "asyncio.run", "asyncio.gather", "async for", "async with"]\n\n[broad_surface_tours.packages]\nrequired_tokens = ["__init__.py", "from .", "__all__"]\n\n[broad_surface_tours.regular-expressions]\nrequired_tokens = ["re.match", "re.search", "re.findall", "re.compile", "re.IGNORECASE", "re.sub"]\n\n[broad_surface_tours.literals]\nrequired_tokens = ["0x", "0b", "_", "f\\"", "True", "None"]\n\n[[footguns]]\nname = "Mutable default class attribute"\nowner = "classes"\nbroken_tokens = ["items = []"]\nfixed_tokens = ["self.items = []"]\n\n[[footguns]]\nname = "Mutable default function argument"\nowner = "functions"\nbroken_tokens = ["items=[]", "append_broken"]\nfixed_tokens = ["items=None", "append_fixed"]\n\n[[footguns]]\nname = "Late-binding closure in a loop"\nowner = "closures"\nbroken_tokens = ["lambda: i", "[2, 2, 2]"]\nfixed_tokens = ["lambda i=i", "[0, 1, 2]"]\n\n[[footguns]]\nname = "Integer identity caching"\nowner = "equality-and-identity"\nbroken_tokens = ["small_a is small_b", "big_a is big_b"]\nfixed_tokens = ["big_a == big_b", "small-integer cache"]\n\n[[footguns]]\nname = "Shallow vs deep copy"\nowner = "copying-collections"\nbroken_tokens = ["copy("]\nfixed_tokens = ["deepcopy("]\n\n[[footguns]]\nname = "Generator one-pass exhaustion"\nowner = "generators"\nbroken_tokens = ["yield"]\nfixed_tokens = ["list("]\n\n[[footguns]]\nname = "Dictionary mutation during iteration"\nowner = "dicts"\nbroken_tokens = ["for ", "del "]\nfixed_tokens = ["list(", ".keys("]\n\n[[footguns]]\nname = "Floating-point equality"\nowner = "numbers"\nbroken_tokens = ["0.1", "0.2"]\nfixed_tokens = ["isclose", "math"]\n\n[[footguns]]\nname = "bool as a subclass of int"\nowner = "booleans"\nbroken_tokens = ["isinstance(True, int)", "True + True"]\nfixed_tokens = ["not isinstance(value, bool)", "is_strict_int"]\n\n[[footguns]]\nname = "Bare except swallowing KeyboardInterrupt"\nowner = "exceptions"\nbroken_tokens = ["except Exception"]\nfixed_tokens = ["except ValueError"]\n\n[paired_pages]\n# Pages whose titles differ only by a suffix or modifier; at least one\n# member of each pair must demonstrate the relationship in a cell.\npairs = [\n  ["iterators", "iterating-over-iterables"],\n  ["iterators", "iterator-vs-iterable"],\n  ["generators", "generator-expressions"],\n  ["comprehensions", "comprehension-patterns"],\n]\n\n[paired_pages.cell_tokens]\n"iterators|iterating-over-iterables" = ["iterable", "iterator"]\n"iterators|iterator-vs-iterable" = ["iterable", "iterator", "iter("]\n"generators|generator-expressions" = ["generator", "expression"]\n"comprehensions|comprehension-patterns" = ["nested loops", "explicit loop"]\n\n[quality_gates]\nexample_target = 9.0\nexample_hard_min = 8.5\njourney_section_min = 8.5\njourney_average_min = 8.8\n\n[quality_waivers.hello-world]\naccepted_min = 7.0\nreason = "Traditional first example is intentionally tiny: program -> output is the goal, not a full concept tour."\nexpires = "2026-12-01"\n\n[no_figure_rationales]\n# Slugs may be added here only when the page is constraint-shaped,\n# infrastructure-shaped, or aggregator-shaped and a single mechanism\n# figure would distort the lesson. Current production attaches figures\n# to every example, so this registry is intentionally empty.\n\n[journey_outcomes]\n\n[journey_outcomes."runtime::Start with executable evidence."]\njourney = "runtime"\nsection = "Start with executable evidence."\nsupport = [\n  "hello-world",\n  "values",\n  "literals",\n  "variables",\n  "constants",\n]\noutcomes = [\n  "start with a complete program and its output",\n  "see that Python programs manipulate runtime objects",\n  "write small values directly in source code",\n  "understand that names bind to objects rather than storing values themselves",\n]\n\n[journey_outcomes."runtime::Separate value, identity, and absence."]\njourney = "runtime"\nsection = "Separate value, identity, and absence."\nsupport = [\n  "none",\n  "booleans",\n  "truthiness",\n  "equality-and-identity",\n  "mutability",\n  "object-lifecycle",\n]\noutcomes = [\n  "represent expected absence with a singleton object",\n  "combine facts with boolean operators",\n  "predict how objects behave in boolean contexts",\n  "distinguish value equality from object identity",\n]\n\n[journey_outcomes."runtime::Read expressions as object operations."]\njourney = "runtime"\nsection = "Read expressions as object operations."\nsupport = [\n  "numbers",\n  "operators",\n  "strings",\n  "string-formatting",\n  "bytes-and-bytearray",\n]\noutcomes = [\n  "use numeric objects and arithmetic operators",\n  "combine, compare, and test values with expression syntax",\n  "treat text as Unicode rather than raw bytes",\n  "turn objects into readable text at output boundaries",\n]\n\n[journey_outcomes."control-flow::Choose between paths."]\njourney = "control-flow"\nsection = "Choose between paths."\nsupport = [\n  "booleans",\n  "truthiness",\n  "operators",\n  "conditionals",\n]\noutcomes = [\n  "combine facts into readable conditions",\n  "use object truth values without hiding intent",\n  "build comparisons and boolean expressions for conditions",\n  "choose between branches with clear predicates",\n]\n\n[journey_outcomes."control-flow::Name and shape decisions."]\njourney = "control-flow"\nsection = "Name and shape decisions."\nsupport = [\n  "assignment-expressions",\n  "match-statements",\n  "advanced-match-patterns",\n]\noutcomes = [\n  "name an intermediate value inside a condition when it improves clarity",\n  "dispatch on the shape of data rather than only on boolean tests",\n  "combine destructuring, alternatives, and guards in pattern matching",\n]\n\n[journey_outcomes."control-flow::Stop as soon as the answer is known."]\njourney = "control-flow"\nsection = "Stop as soon as the answer is known."\nsupport = [\n  "guard-clauses",\n  "assertions",\n  "exceptions",\n]\noutcomes = [\n  "show how early returns reduce nested conditional code",\n  "state assumptions that should fail loudly while developing",\n  "leave the current path when ordinary return values are not enough",\n]\n\n[journey_outcomes."iteration::Choose the right loop shape."]\njourney = "iteration"\nsection = "Choose the right loop shape."\nsupport = [\n  "for-loops",\n  "while-loops",\n  "break-and-continue",\n  "loop-else",\n  "sentinel-iteration",\n]\noutcomes = [\n  "consume values from an iterable",\n  "repeat while a condition must be rechecked",\n  "interrupt or skip loop work intentionally",\n  "attach completion logic to loops that did not break",\n]\n\n[journey_outcomes."iteration::See the protocol behind `for`."]\njourney = "iteration"\nsection = "See the protocol behind `for`."\nsupport = [\n  "iterating-over-iterables",\n  "iterator-vs-iterable",\n  "iterators",\n  "generators",\n]\noutcomes = [\n  "separate value producers from value consumers",\n  "use `iter()` and `next()` to expose the protocol behind `for`",\n  "write functions that produce values lazily",\n]\n\n[journey_outcomes."iteration::Compose lazy value streams."]\njourney = "iteration"\nsection = "Compose lazy value streams."\nsupport = [\n  "generator-expressions",\n  "itertools",\n  "yield-from",\n]\noutcomes = [\n  "create lazy one-pass streams with expression syntax",\n  "compose iterator streams without materializing every value",\n  "delegate part of a generator to another iterable",\n]\n\n[journey_outcomes."shapes::Pick the container that matches the question."]\njourney = "shapes"\nsection = "Pick the container that matches the question."\nsupport = [\n  "lists",\n  "tuples",\n  "dicts",\n  "sets",\n  "collections-module",\n]\noutcomes = [\n  "store ordered mutable data",\n  "group fixed-position values",\n  "look up values by key",\n  "model uniqueness and membership",\n]\n\n[journey_outcomes."shapes::Move between shapes deliberately."]\njourney = "shapes"\nsection = "Move between shapes deliberately."\nsupport = [\n  "unpacking",\n  "slices",\n  "comprehensions",\n  "comprehension-patterns",\n  "sorting",\n  "copying-collections",\n]\noutcomes = [\n  "bind names from structured values",\n  "select ranges from sequences",\n  "build concrete collections from compact loops",\n  "compose filters and nested transformations",\n]\n\n[journey_outcomes."shapes::Cross text and data boundaries."]\njourney = "shapes"\nsection = "Cross text and data boundaries."\nsupport = [\n  "number-parsing",\n  "json",\n  "regular-expressions",\n  "datetime",\n  "csv-data",\n]\noutcomes = [\n  "turn text into numbers safely",\n  "move structured data across a text boundary",\n  "extract structure from text patterns",\n  "represent dates, times, and durations as typed values",\n]\n\n[journey_outcomes."interfaces::Start with functions as named behavior."]\njourney = "interfaces"\nsection = "Start with functions as named behavior."\nsupport = [\n  "functions",\n  "keyword-only-arguments",\n  "positional-only-parameters",\n  "args-and-kwargs",\n  "multiple-return-values",\n]\noutcomes = [\n  "package behavior behind a name",\n  "make important call-site choices explicit",\n  "hide parameter names that should remain implementation details",\n  "accept flexible call shapes when forwarding or adapting APIs",\n]\n\n[journey_outcomes."interfaces::Use functions as values."]\njourney = "interfaces"\nsection = "Use functions as values."\nsupport = [\n  "scope-global-nonlocal",\n  "closures",\n  "recursion",\n  "lambdas",\n  "decorators",\n  "partial-functions",\n]\noutcomes = [\n  "control where assignment happens",\n  "capture state in nested functions",\n  "solve self-similar problems with a base case",\n  "write small unnamed functions for expression positions",\n]\n\n[journey_outcomes."interfaces::Bundle behavior with state."]\njourney = "interfaces"\nsection = "Bundle behavior with state."\nsupport = [\n  "classes",\n  "inheritance-and-super",\n  "dataclasses",\n  "properties",\n  "classmethods-and-staticmethods",\n  "special-methods",\n  "truth-and-size",\n  "container-protocols",\n  "callable-objects",\n  "operator-overloading",\n  "attribute-access",\n  "bound-and-unbound-methods",\n  "descriptors",\n  "metaclasses",\n]\noutcomes = [\n  "bundle state and behavior into a new object type",\n  "reuse and extend behavior through parent classes",\n  "generate common methods for data containers",\n  "keep attribute syntax while adding computation or validation",\n]\n\n[journey_outcomes."types::Keep runtime and static analysis separate."]\njourney = "types"\nsection = "Keep runtime and static analysis separate."\nsupport = [\n  "type-hints",\n  "protocols",\n  "abstract-base-classes",\n  "enums",\n  "runtime-type-checks",\n]\noutcomes = [\n  "document expected types and feed type checkers",\n  "describe required behavior by structural shape",\n  "name a fixed set of symbolic values",\n  "show `type()`, `isinstance()`, and `issubclass()` without turning Python into Java",\n]\n\n[journey_outcomes."types::Describe realistic data shapes."]\njourney = "types"\nsection = "Describe realistic data shapes."\nsupport = [\n  "union-and-optional-types",\n  "type-aliases",\n  "typed-dicts",\n  "structured-data-shapes",\n  "literal-and-final",\n  "callable-types",\n]\noutcomes = [\n  "show `X | Y` and `None`-aware APIs",\n  "name complex types with `type` statements or aliases",\n  "type dictionary records that come from JSON",\n  "express constrained values and names that should not be rebound",\n]\n\n[journey_outcomes."types::Scale annotations for reusable libraries."]\njourney = "types"\nsection = "Scale annotations for reusable libraries."\nsupport = [\n  "generics-and-typevar",\n  "paramspec",\n  "overloads",\n  "casts-and-any",\n  "newtype",\n]\noutcomes = [\n  "write reusable typed containers and functions",\n  "preserve callable signatures through decorators",\n  "describe APIs whose return type depends on the input shape",\n  "show escape hatches and their tradeoffs",\n]\n\n[journey_outcomes."reliability::Make failure explicit."]\njourney = "reliability"\nsection = "Make failure explicit."\nsupport = [\n  "exceptions",\n  "assertions",\n  "exception-chaining",\n  "exception-groups",\n  "custom-exceptions",\n  "warnings",\n]\noutcomes = [\n  "signal and recover from errors",\n  "state internal assumptions",\n  "preserve the cause while translating an error",\n  "handle multiple failures together",\n]\n\n[journey_outcomes."reliability::Control resource and module boundaries."]\njourney = "reliability"\nsection = "Control resource and module boundaries."\nsupport = [\n  "context-managers",\n  "delete-statements",\n  "modules",\n  "import-aliases",\n  "packages",\n  "virtual-environments",\n]\noutcomes = [\n  "pair setup with reliable cleanup",\n  "remove names, attributes, and items intentionally",\n  "split code into importable files",\n  "make imported names clear at use sites",\n]\n\n[journey_outcomes."reliability::Handle operations that outlive one expression."]\njourney = "reliability"\nsection = "Handle operations that outlive one expression."\nsupport = [\n  "async-await",\n  "async-iteration-and-context",\n  "logging",\n  "testing",\n  "subprocesses",\n  "threads-and-processes",\n  "networking",\n]\noutcomes = [\n  "await concurrent I/O-shaped work",\n  "consume async streams and cleanup protocols",\n  "record operational events without using `print()`",\n  "write deterministic tests with `unittest` or `pytest`",\n]\n\n[score_model]\n# Criterion weights mirror docs/example-quality-rubric.md. The registry\n# makes the scoring model inspectable even before every example is broken\n# down into per-criterion subscores.\nconceptual_payoff = 1.0\nrationale = 0.75\nalternatives_and_boundaries = 0.75\nexecutable_determinism = 1.0\npython_idiom_and_accuracy = 1.0\nliterate_fit = 0.75\nsource_result_pairing = 0.75\nconcept_decomposition = 0.75\nprogressive_walkthrough = 0.75\nrepresentative_coverage = 0.75\npractical_usefulness = 0.75\neditorial_progression = 1.0\n\n# Editorial registries loaded by the site at runtime.\n# Keep prose, captions, scores, journey ordering, and edge labels here;\n# keep executable paint functions in src/marginalia.py.\n\n[[journeys]]\nslug = "runtime"\ntitle = "Runtime"\nsummary = "This journey builds the smallest coherent model of Python at runtime: programs run statements, names refer to objects, objects have types, and operations ask those objects to do work."\n\n[[journeys.sections]]\ntitle = "Start with executable evidence."\nsummary = "Learners first need to see that every page is a runnable program with visible output."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "hello-world"\ndescription = "start with a complete program and its output"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "values"\ndescription = "see that Python programs manipulate runtime objects"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "literals"\ndescription = "write small values directly in source code"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "variables"\ndescription = "understand that names bind to objects rather than storing values themselves"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "constants"\ndescription = "learn the convention Python uses for values that should not change"\n\n[[journeys.sections]]\ntitle = "Separate value, identity, and absence."\nsummary = "This section prevents early confusion about equality, object identity, missing values, and truth tests."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "none"\ndescription = "represent expected absence with a singleton object"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "booleans"\ndescription = "combine facts with boolean operators"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "truthiness"\ndescription = "predict how objects behave in boolean contexts"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "equality-and-identity"\ndescription = "distinguish value equality from object identity"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "mutability"\ndescription = "predict when operations change an object in place"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "object-lifecycle"\ndescription = "explain references, garbage collection, and why identity can outlive a single name"\n\n[[journeys.sections]]\ntitle = "Read expressions as object operations."\nsummary = "This section connects operators, text, and formatting to Python\'s data model."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "numbers"\ndescription = "use numeric objects and arithmetic operators"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "operators"\ndescription = "combine, compare, and test values with expression syntax"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "strings"\ndescription = "treat text as Unicode rather than raw bytes"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "string-formatting"\ndescription = "turn objects into readable text at output boundaries"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "bytes-and-bytearray"\ndescription = "contrast text with binary data and explicit decoding"\n\n[[journeys]]\nslug = "control-flow"\ntitle = "Control Flow"\nsummary = "This journey follows how a Python program chooses which path runs, names facts at decision points, and exits early when the remaining work no longer applies."\n\n[[journeys.sections]]\ntitle = "Choose between paths."\nsummary = "Start with ordinary branching and boolean predicates before reaching for more compact forms."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "booleans"\ndescription = "combine facts into readable conditions"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "truthiness"\ndescription = "use object truth values without hiding intent"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "operators"\ndescription = "build comparisons and boolean expressions for conditions"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "conditionals"\ndescription = "choose between branches with clear predicates"\n\n[[journeys.sections]]\ntitle = "Name and shape decisions."\nsummary = "Some branches become clearer when the code names an intermediate value or dispatches on data shape."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "assignment-expressions"\ndescription = "name an intermediate value inside a condition when it improves clarity"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "match-statements"\ndescription = "dispatch on the shape of data rather than only on boolean tests"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "advanced-match-patterns"\ndescription = "combine destructuring, alternatives, and guards in pattern matching"\n\n[[journeys.sections]]\ntitle = "Stop as soon as the answer is known."\nsummary = "Early exits make the successful path easier to read by moving exceptional or completed cases out of the way."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "guard-clauses"\ndescription = "show how early returns reduce nested conditional code"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "assertions"\ndescription = "state assumptions that should fail loudly while developing"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "exceptions"\ndescription = "leave the current path when ordinary return values are not enough"\n\n[[journeys]]\nslug = "iteration"\ntitle = "Iteration"\nsummary = "This journey follows repeated work from ordinary loops to the iterator protocol: consume values, stop deliberately, and produce lazy streams only when they help."\n\n[[journeys.sections]]\ntitle = "Choose the right loop shape."\nsummary = "Loops differ by what they consume, when they stop, and whether completion itself carries meaning."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "for-loops"\ndescription = "consume values from an iterable"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "while-loops"\ndescription = "repeat while a condition must be rechecked"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "break-and-continue"\ndescription = "interrupt or skip loop work intentionally"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "loop-else"\ndescription = "attach completion logic to loops that did not break"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "sentinel-iteration"\ndescription = "show `iter(callable, sentinel)` for repeated reads until a marker appears"\n\n[[journeys.sections]]\ntitle = "See the protocol behind `for`."\nsummary = "The important mental shift is that loops consume producers through a protocol rather than special-casing lists."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "iterating-over-iterables"\ndescription = "separate value producers from value consumers"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "iterator-vs-iterable"\ndescription = "distinguish re-iterable collections from one-pass iterators"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "iterators"\ndescription = "use `iter()` and `next()` to expose the protocol behind `for`"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "generators"\ndescription = "write functions that produce values lazily"\n\n[[journeys.sections]]\ntitle = "Compose lazy value streams."\nsummary = "Iterator pipelines are useful when code can transform values one at a time instead of materializing every intermediate result."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "generator-expressions"\ndescription = "create lazy one-pass streams with expression syntax"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "itertools"\ndescription = "compose iterator streams without materializing every value"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "yield-from"\ndescription = "delegate part of a generator to another iterable"\n\n[[journeys]]\nslug = "shapes"\ntitle = "Shapes"\nsummary = "This journey teaches the core Python habit of choosing a data shape, transforming it directly, and making the result visible."\n\n[[journeys.sections]]\ntitle = "Pick the container that matches the question."\nsummary = "Lists, tuples, dictionaries, and sets answer different questions about order, position, lookup, and uniqueness."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "lists"\ndescription = "store ordered mutable data"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "tuples"\ndescription = "group fixed-position values"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "dicts"\ndescription = "look up values by key"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "sets"\ndescription = "model uniqueness and membership"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "collections-module"\ndescription = "show `deque`, `Counter`, `defaultdict`, and `namedtuple` as specialized shapes"\n\n[[journeys.sections]]\ntitle = "Move between shapes deliberately."\nsummary = "Most everyday Python code is data reshaping, so learners need the idioms for selecting, unpacking, and rebuilding values."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "unpacking"\ndescription = "bind names from structured values"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "slices"\ndescription = "select ranges from sequences"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "comprehensions"\ndescription = "build concrete collections from compact loops"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "comprehension-patterns"\ndescription = "compose filters and nested transformations"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "sorting"\ndescription = "order records with key functions"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "copying-collections"\ndescription = "contrast shallow copies, deep copies, and shared nested data"\n\n[[journeys.sections]]\ntitle = "Cross text and data boundaries."\nsummary = "Programs often receive text and produce structured data, so parsing and serialization belong in the data journey."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "number-parsing"\ndescription = "turn text into numbers safely"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "json"\ndescription = "move structured data across a text boundary"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "regular-expressions"\ndescription = "extract structure from text patterns"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "datetime"\ndescription = "represent dates, times, and durations as typed values"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "csv-data"\ndescription = "show row-shaped text data and dictionary records"\n\n[[journeys]]\nslug = "interfaces"\ntitle = "Interfaces"\nsummary = "This journey shows how Python grows from simple functions to callable APIs, object interfaces, protocols, and metaclasses."\n\n[[journeys.sections]]\ntitle = "Start with functions as named behavior."\nsummary = "Functions are the first abstraction boundary because they name behavior and control how callers provide information."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "functions"\ndescription = "package behavior behind a name"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "keyword-only-arguments"\ndescription = "make important call-site choices explicit"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "positional-only-parameters"\ndescription = "hide parameter names that should remain implementation details"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "args-and-kwargs"\ndescription = "accept flexible call shapes when forwarding or adapting APIs"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "multiple-return-values"\ndescription = "return multiple related values as a tuple"\n\n[[journeys.sections]]\ntitle = "Use functions as values."\nsummary = "Python functions can capture state, be passed around, and wrap other functions."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "scope-global-nonlocal"\ndescription = "control where assignment happens"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "closures"\ndescription = "capture state in nested functions"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "recursion"\ndescription = "solve self-similar problems with a base case"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "lambdas"\ndescription = "write small unnamed functions for expression positions"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "decorators"\ndescription = "wrap behavior without changing call sites"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "partial-functions"\ndescription = "show how to pre-fill arguments with `functools.partial`"\n\n[[journeys.sections]]\ntitle = "Bundle behavior with state."\nsummary = "Classes become useful when data and behavior need to move together behind a stable interface."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "classes"\ndescription = "bundle state and behavior into a new object type"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "inheritance-and-super"\ndescription = "reuse and extend behavior through parent classes"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "dataclasses"\ndescription = "generate common methods for data containers"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "properties"\ndescription = "keep attribute syntax while adding computation or validation"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "classmethods-and-staticmethods"\ndescription = "choose between instance, class, and static behavior on a class"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "special-methods"\ndescription = "connect objects to Python syntax and built-ins"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "truth-and-size"\ndescription = "make objects work with truth tests and `len()`"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "container-protocols"\ndescription = "support membership, lookup, and assignment syntax"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "callable-objects"\ndescription = "make stateful instances callable like functions"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "operator-overloading"\ndescription = "define operators only when the operation is unsurprising"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "attribute-access"\ndescription = "customize fallback lookup and assignment carefully"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "bound-and-unbound-methods"\ndescription = "explain how attribute access turns a function into a bound method"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "descriptors"\ndescription = "explain the protocol behind methods, properties, and managed attributes"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "metaclasses"\ndescription = "customize class creation when ordinary class tools are not enough"\n\n[[journeys]]\nslug = "types"\ntitle = "Types"\nsummary = "This journey maps Python\'s runtime object model to optional static annotations so learners know what types can and cannot promise."\n\n[[journeys.sections]]\ntitle = "Keep runtime and static analysis separate."\nsummary = "The first lesson is that annotations describe expectations for tools while ordinary Python objects still run the program."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "type-hints"\ndescription = "document expected types and feed type checkers"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "protocols"\ndescription = "describe required behavior by structural shape"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "abstract-base-classes"\ndescription = "contrast runtime-enforced nominal interfaces with structural protocols"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "enums"\ndescription = "name a fixed set of symbolic values"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "runtime-type-checks"\ndescription = "show `type()`, `isinstance()`, and `issubclass()` without turning Python into Java"\n\n[[journeys.sections]]\ntitle = "Describe realistic data shapes."\nsummary = "Typed Python becomes useful when annotations explain optional values, unions, callables, and JSON-like records."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "union-and-optional-types"\ndescription = "show `X | Y` and `None`-aware APIs"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "type-aliases"\ndescription = "name complex types with `type` statements or aliases"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "typed-dicts"\ndescription = "type dictionary records that come from JSON"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "structured-data-shapes"\ndescription = "choose between dataclass, NamedTuple, and TypedDict for records"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "literal-and-final"\ndescription = "express constrained values and names that should not be rebound"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "callable-types"\ndescription = "type functions that are passed as arguments"\n\n[[journeys.sections]]\ntitle = "Scale annotations for reusable libraries."\nsummary = "Advanced typing exists to preserve information across reusable functions, containers, and decorators."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "generics-and-typevar"\ndescription = "write reusable typed containers and functions"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "paramspec"\ndescription = "preserve callable signatures through decorators"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "overloads"\ndescription = "describe APIs whose return type depends on the input shape"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "casts-and-any"\ndescription = "show escape hatches and their tradeoffs"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "newtype"\ndescription = "create distinct static identities for runtime-compatible values"\n\n[[journeys]]\nslug = "reliability"\ntitle = "Reliability"\nsummary = "This journey follows the boundaries where programs fail, clean up, split into modules, communicate with the outside world, and run concurrent work."\n\n[[journeys.sections]]\ntitle = "Make failure explicit."\nsummary = "Robust Python code distinguishes expected absence, broken assumptions, recoverable errors, and domain-specific failures."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "exceptions"\ndescription = "signal and recover from errors"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "assertions"\ndescription = "state internal assumptions"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "exception-chaining"\ndescription = "preserve the cause while translating an error"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "exception-groups"\ndescription = "handle multiple failures together"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "custom-exceptions"\ndescription = "name failures in the language of the problem domain"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "warnings"\ndescription = "signal soft problems and deprecations"\n\n[[journeys.sections]]\ntitle = "Control resource and module boundaries."\nsummary = "Cleanup, deletion, imports, and modules define where responsibilities begin and end."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "context-managers"\ndescription = "pair setup with reliable cleanup"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "delete-statements"\ndescription = "remove names, attributes, and items intentionally"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "modules"\ndescription = "split code into importable files"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "import-aliases"\ndescription = "make imported names clear at use sites"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "packages"\ndescription = "show package directories, `__init__.py`, and public module boundaries"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "virtual-environments"\ndescription = "isolate dependencies for a project"\n\n[[journeys.sections]]\ntitle = "Handle operations that outlive one expression."\nsummary = "I/O, testing, logging, subprocesses, and concurrency require different control boundaries from ordinary expressions."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "async-await"\ndescription = "await concurrent I/O-shaped work"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "async-iteration-and-context"\ndescription = "consume async streams and cleanup protocols"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "logging"\ndescription = "record operational events without using `print()`"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "testing"\ndescription = "write deterministic tests with `unittest` or `pytest`"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "subprocesses"\ndescription = "run external commands safely"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "threads-and-processes"\ndescription = "contrast concurrency choices beyond `asyncio`"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "networking"\ndescription = "make HTTP or socket boundaries explicit"\n\n# Explicit see_also edge labels; default labels are inferred in src/app.py.\n[[see_also_edge_labels]]\nsource = "break-and-continue"\ntarget = "loop-else"\nlabel = "contrast"\n\n[[see_also_edge_labels]]\nsource = "assignment-expressions"\ntarget = "conditionals"\nlabel = "contrast"\n\n[[see_also_edge_labels]]\nsource = "yield-from"\ntarget = "generators"\nlabel = "prerequisite"\n\n[[see_also_edge_labels]]\nsource = "async-iteration-and-context"\ntarget = "async-await"\nlabel = "prerequisite"\n\n[[see_also_edge_labels]]\nsource = "delete-statements"\ntarget = "mutability"\nlabel = "shared mechanism"\n\n[[see_also_edge_labels]]\nsource = "positional-only-parameters"\ntarget = "keyword-only-arguments"\nlabel = "contrast"\n\n[[see_also_edge_labels]]\nsource = "assertions"\ntarget = "exceptions"\nlabel = "alternative"\n\n[[see_also_edge_labels]]\nsource = "exception-chaining"\ntarget = "exceptions"\nlabel = "builds on"\n\n[[see_also_edge_labels]]\nsource = "exception-groups"\ntarget = "exceptions"\nlabel = "alternative"\n\n[[see_also_edge_labels]]\nsource = "operators"\ntarget = "numbers"\nlabel = "related syntax"\n\n[[see_also_edge_labels]]\nsource = "operators"\ntarget = "booleans"\nlabel = "condition building"\n\n[[see_also_edge_labels]]\nsource = "operators"\ntarget = "assignment-expressions"\nlabel = "specialized expression"\n\n[[see_also_edge_labels]]\nsource = "literals"\ntarget = "values"\nlabel = "value surface"\n\n[[see_also_edge_labels]]\nsource = "literals"\ntarget = "strings"\nlabel = "text literal"\n\n[[see_also_edge_labels]]\nsource = "literals"\ntarget = "sets"\nlabel = "container literal"\n\n# Example-cell figure attachments. figure names refer to FIGURES paint functions.\n[[figure_attachments]]\nslug = "mutability"\nanchor = "cell-0"\nfigure = "aliasing-mutation"\ncaption = "Two names share one mutable list — appending through one name changes the object visible through both."\n\n[[figure_attachments]]\nslug = "mutability"\nanchor = "cell-0"\nfigure = "tuple-no-mutation"\ncaption = "By contrast, a tuple is frozen — its contents cannot change in place, so aliasing carries no mutation hazard."\n\n[[figure_attachments]]\nslug = "variables"\nanchor = "cell-0"\nfigure = "variables-bind"\ncaption = "A name is a label that points at an object. Assignment binds the label; the object exists independently."\n\n[[figure_attachments]]\nslug = "lists"\nanchor = "cell-0"\nfigure = "list-append"\ncaption = "Lists are mutable sequences. `.append` extends the same list object — no new list is created."\n\n[[figure_attachments]]\nslug = "dicts"\nanchor = "cell-0"\nfigure = "dict-buckets"\ncaption = "Each key is hashed to a bucket; collisions chain into the next slot. Lookup is constant-time on average."\n\n[[figure_attachments]]\nslug = "unpacking"\nanchor = "cell-0"\nfigure = "unpacking-bind"\ncaption = "Left-side names bind to right-side positions; `*rest` gathers the middle into a list."\n\n[[figure_attachments]]\nslug = "comprehensions"\nanchor = "cell-0"\nfigure = "comprehension-equivalence"\ncaption = "A comprehension is a compact spelling of the equivalent for-loop with append, made into one expression."\n\n[[figure_attachments]]\nslug = "classes"\nanchor = "cell-0"\nfigure = "class-triangle"\ncaption = "Every Python value sits on the instance → class → type triangle; the metaclass is the type of the class."\n\n[[figure_attachments]]\nslug = "inheritance-and-super"\nanchor = "cell-0"\nfigure = "mro-chain"\ncaption = "Multiple inheritance forms a graph; C3 linearisation flattens it into the MRO Python uses for attribute lookup."\n\n[[figure_attachments]]\nslug = "dataclasses"\nanchor = "cell-0"\nfigure = "dataclass-fields"\ncaption = "Field declarations become the generated __init__ signature: declaration is the constructor."\n\n[[figure_attachments]]\nslug = "special-methods"\nanchor = "cell-0"\nfigure = "operator-dispatch"\ncaption = "Operators are method calls. `a + b` dispatches to `a.__add__(b)`; the data model exposes the syntax."\n\n[[figure_attachments]]\nslug = "decorators"\nanchor = "cell-0"\nfigure = "decorator-rebind"\ncaption = "@dec rebinds the name to wrapper(f₀); the original function survives only in the wrapper\'s closure cell."\n\n[[figure_attachments]]\nslug = "recursion"\nanchor = "cell-1"\nfigure = "call-stack"\ncaption = "Each call pushes a new frame with the same name and a smaller argument; the base case unwinds back up the stack."\n\n[[figure_attachments]]\nslug = "exception-chaining"\nanchor = "cell-0"\nfigure = "exception-cause-context"\ncaption = "`raise X from Y` sets `__cause__` (explicit); raising during except sets `__context__` (implicit)."\n\n[[figure_attachments]]\nslug = "hello-world"\nanchor = "cell-0"\nfigure = "program-output"\ncaption = "Every Python program starts as source and produces text on standard output. The smallest mental model."\n\n[[figure_attachments]]\nslug = "numbers"\nanchor = "cell-0"\nfigure = "number-lines"\ncaption = "Ints have unbounded precision; floats use IEEE doubles whose representable values thin out near the extremes."\n\n[[figure_attachments]]\nslug = "operators"\nanchor = "cell-0"\nfigure = "expression-tree"\ncaption = "An expression like `(2 + 3) * 4` parses as a tree; operator precedence and parentheses determine its shape."\n\n[[figure_attachments]]\nslug = "none"\nanchor = "cell-0"\nfigure = "none-singleton"\ncaption = "`None` is a single object: every name that points at None points at the same object."\n\n[[figure_attachments]]\nslug = "equality-and-identity"\nanchor = "cell-0"\nfigure = "identity-and-equality"\ncaption = "Two names can share one object (`is` and `==` both true) or hold two equal-but-distinct objects (only `==` true)."\n\n[[figure_attachments]]\nslug = "strings"\nanchor = "cell-0"\nfigure = "codepoints-bytes"\ncaption = "Strings are sequences of Unicode codepoints. UTF-8 encoding turns them into bytes; `é` takes two bytes, `c` takes one."\n\n[[figure_attachments]]\nslug = "for-loops"\nanchor = "cell-1"\nfigure = "iterator-unroll"\ncaption = "Each call to next() advances the caret one cell along the iterable — the same shape behind range(), strings, and any sequence."\n\n[[figure_attachments]]\nslug = "sorting"\nanchor = "cell-1"\nfigure = "sort-stability"\ncaption = "Python\'s sort is stable: items with equal keys keep their original order, so chained sorts compose predictably."\n\n[[figure_attachments]]\nslug = "keyword-only-arguments"\nanchor = "cell-0"\nfigure = "kw-only-separator"\ncaption = "A bare `*` divides positional or keyword arguments from keyword-only ones; callers must pass `c` and `d` by name."\n\n[[figure_attachments]]\nslug = "positional-only-parameters"\nanchor = "cell-0"\nfigure = "positional-only-separator"\ncaption = "A bare `/` divides positional-only arguments from positional-or-keyword ones; callers cannot name `a` or `b`."\n\n[[figure_attachments]]\nslug = "positional-only-parameters"\nanchor = "cell-0"\nfigure = "kw-only-separator"\ncaption = "In the same signature, the bare `*` works the other way: parameters after it, such as `clamp`, must be named at the call site."\n\n[[figure_attachments]]\nslug = "closures"\nanchor = "cell-0"\nfigure = "closure-cell"\ncaption = "The inner function keeps a reference into the outer scope\'s cell, so the captured factor survives the outer return."\n\n[[figure_attachments]]\nslug = "scope-global-nonlocal"\nanchor = "cell-0"\nfigure = "scope-rings"\ncaption = "Name lookup walks LEGB — local, enclosing, global, built-in — outward, returning the first binding it finds."\n\n[[figure_attachments]]\nslug = "generators"\nanchor = "cell-0"\nfigure = "generator-ribbon"\ncaption = "A generator\'s body is a timeline cut by yield gates: each next() advances to the next gate; locals survive the pause."\n\n[[figure_attachments]]\nslug = "type-hints"\nanchor = "cell-0"\nfigure = "annotation-ghost"\ncaption = "Annotations describe expected types for tools; the runtime accepts any object regardless."\n\n[[figure_attachments]]\nslug = "exceptions"\nanchor = "cell-0"\nfigure = "exception-lanes"\ncaption = "try, except, else, and finally as parallel lanes; a single coral path traces what actually runs."\n\n[[figure_attachments]]\nslug = "context-managers"\nanchor = "cell-0"\nfigure = "context-bowtie"\ncaption = "A context manager pairs setup with reliable cleanup; the raise path still routes through __exit__."\n\n[[figure_attachments]]\nslug = "async-await"\nanchor = "cell-1"\nfigure = "async-swimlane"\ncaption = "On await, the coroutine yields to the loop; the loop runs other work and resumes when the awaitable is ready."\n\n[[figure_attachments]]\nslug = "iterators"\nanchor = "cell-0"\nfigure = "iter-protocol"\ncaption = "iter() exposes the iterator behind for; next() pulls one value at a time until exhausted."\n\n[[figure_attachments]]\nslug = "slices"\nanchor = "cell-0"\nfigure = "slice-ruler"\ncaption = "Slice indices sit between cells; [:3] and [3:] partition the sequence at index 3, never overlapping or losing an item."\n\n[[figure_attachments]]\nslug = "operator-overloading"\nanchor = "cell-0"\nfigure = "operator-dispatch"\ncaption = "Defining `__add__` on a class lets `+` dispatch into the class\'s own behavior."\n\n[[figure_attachments]]\nslug = "iterator-vs-iterable"\nanchor = "cell-0"\nfigure = "iter-protocol"\ncaption = "An iterable knows how to produce an iterator (via iter()); the iterator knows how to produce values (via next())."\n\n[[figure_attachments]]\nslug = "iterator-vs-iterable"\nanchor = "cell-1"\nfigure = "iterator-unroll"\ncaption = "The iterator\'s caret only moves forward — after the first `list(stream)` drains it, nothing is left for the second."\n\n[[figure_attachments]]\nslug = "type-aliases"\nanchor = "cell-0"\nfigure = "type-alias-name"\ncaption = "A type alias names a complex annotation once so call sites read as the domain meaning, not the type composition."\n\n[[figure_attachments]]\nslug = "typed-dicts"\nanchor = "cell-0"\nfigure = "typed-dict-shape"\ncaption = "TypedDict gives each key a typed value, so `obj[\'x\']` is checked against the declared shape."\n\n[[figure_attachments]]\nslug = "union-and-optional-types"\nanchor = "cell-0"\nfigure = "union-types"\ncaption = "`int | str | None` says one slot may hold any of three shapes — including expected absence."\n\n[[figure_attachments]]\nslug = "generics-and-typevar"\nanchor = "cell-0"\nfigure = "generic-preservation"\ncaption = "A generic preserves the input type through the call: the same T flows in and out of fn[T]."\n\n[[figure_attachments]]\nslug = "abstract-base-classes"\nanchor = "cell-0"\nfigure = "class-triangle"\ncaption = "An ABC sits on the same triangle as concrete classes; subclasses inherit the abstract methods they must implement."\n\n[[figure_attachments]]\nslug = "copying-collections"\nanchor = "cell-0"\nfigure = "aliasing-mutation"\ncaption = "Without copy() two names share the same object; mutating through one is visible through the other."\n\n[[figure_attachments]]\nslug = "truth-and-size"\nanchor = "cell-0"\nfigure = "truth-and-size"\ncaption = "bool(x) calls __bool__ first; if absent, __len__() != 0; if neither, defaults to True."\n\n[[figure_attachments]]\nslug = "descriptors"\nanchor = "cell-0"\nfigure = "descriptor-protocol"\ncaption = "Attribute access on an instance routes through the descriptor\'s __get__/__set__/__delete__ when the attribute is a descriptor."\n\n[[figure_attachments]]\nslug = "bound-and-unbound-methods"\nanchor = "cell-0"\nfigure = "bound-unbound"\ncaption = "Accessing a method via an instance binds self; accessing it via the class returns the underlying function."\n\n[[figure_attachments]]\nslug = "classmethods-and-staticmethods"\nanchor = "cell-0"\nfigure = "method-kinds"\ncaption = "Three method kinds, three first-argument conventions: classmethod gets the class, staticmethod gets nothing, instance gets self."\n\n[[figure_attachments]]\nslug = "callable-objects"\nanchor = "cell-0"\nfigure = "callable-objects"\ncaption = "Defining __call__ makes any object callable; functions are just one shape that satisfies this protocol."\n\n[[figure_attachments]]\nslug = "attribute-access"\nanchor = "cell-0"\nfigure = "attribute-lookup"\ncaption = "obj.x checks instance __dict__, then class __dict__, then __getattr__; the first hit wins."\n\n[[figure_attachments]]\nslug = "guard-clauses"\nanchor = "cell-0"\nfigure = "guard-clauses"\ncaption = "Early returns handle the exceptional cases first so the main work is the body of the function, not its tail."\n\n[[figure_attachments]]\nslug = "bytes-and-bytearray"\nanchor = "cell-0"\nfigure = "bytes-vs-bytearray"\ncaption = "bytes is a frozen sequence of integers; bytearray is the mutable counterpart with append/extend/etc."\n\n[[figure_attachments]]\nslug = "sentinel-iteration"\nanchor = "cell-0"\nfigure = "sentinel-iteration"\ncaption = "`iter(callable, sentinel)` calls the callable repeatedly, stopping when it returns the sentinel."\n\n[[figure_attachments]]\nslug = "partial-functions"\nanchor = "cell-0"\nfigure = "partial-functions"\ncaption = "`functools.partial(f, 1)` pre-fills `a=1`, returning a thinner callable `g(b, c)` that only needs the rest."\n\n[[figure_attachments]]\nslug = "args-and-kwargs"\nanchor = "cell-0"\nfigure = "args-kwargs"\ncaption = "*args captures the extra positionals as a tuple; **kwargs captures the extra keywords as a dict."\n\n[[figure_attachments]]\nslug = "multiple-return-values"\nanchor = "cell-0"\nfigure = "multiple-return"\ncaption = "A function returning multiple values really returns one tuple; the caller unpacks it into named bindings."\n\n[[figure_attachments]]\nslug = "lambdas"\nanchor = "cell-0"\nfigure = "lambda-expression"\ncaption = "A lambda is a function literal: parameters before the colon, a single expression after, no statement body."\n\n[[figure_attachments]]\nslug = "properties"\nanchor = "cell-0"\nfigure = "property-fork"\ncaption = "When x is a property, attribute access routes through fget/fset instead of touching __dict__."\n\n[[figure_attachments]]\nslug = "metaclasses"\nanchor = "cell-0"\nfigure = "metaclass-triangle"\ncaption = "A metaclass is the type of a class, just as a class is the type of its instances; type is the default metaclass."\n\n[[figure_attachments]]\nslug = "metaclasses"\nanchor = "cell-0"\nfigure = "class-triangle"\ncaption = "The class makes instances — the same triangle one level down, with type as the default apex."\n\n[[figure_attachments]]\nslug = "modules"\nanchor = "cell-0"\nfigure = "sys-path-resolution"\ncaption = "An import walks sys.path entry by entry; the first directory containing the module wins."\n\n[[figure_attachments]]\nslug = "import-aliases"\nanchor = "cell-0"\nfigure = "import-alias"\ncaption = "`import x as y` binds the name y to the same module object x would have."\n\n[[figure_attachments]]\nslug = "protocols"\nanchor = "cell-0"\nfigure = "protocol-check"\ncaption = "An object satisfies a protocol structurally — by having the required methods — not by inheriting it."\n\n[[figure_attachments]]\nslug = "enums"\nanchor = "cell-0"\nfigure = "enum-members"\ncaption = "An enum names a fixed set of symbolic values; no new members appear at runtime."\n\n[[figure_attachments]]\nslug = "datetime"\nanchor = "cell-0"\nfigure = "datetime-instant"\ncaption = "An aware datetime carries a UTC offset; one instant in time reads differently on two clocks."\n\n[[figure_attachments]]\nslug = "json"\nanchor = "cell-0"\nfigure = "json-python-mapping"\ncaption = "Six type pairs bridge the JSON text boundary; each json value maps to one Python type."\n\n[[figure_attachments]]\nslug = "regular-expressions"\nanchor = "cell-0"\nfigure = "regex-anchors"\ncaption = "^ and $ anchor the pattern; quantifiers like {2} bound how many times a token repeats."\n\n[[figure_attachments]]\nslug = "number-parsing"\nanchor = "cell-0"\nfigure = "number-parse"\ncaption = "int() turns text into a typed number; malformed input raises ValueError instead of guessing."\n\n[[figure_attachments]]\nslug = "string-formatting"\nanchor = "cell-1"\nfigure = "format-spec"\ncaption = "The format spec is a railroad of named optional fields: alignment, sign, width, precision, type."\n\n[[figure_attachments]]\nslug = "truthiness"\nanchor = "cell-0"\nfigure = "truthy-check"\ncaption = "bool(x) is True except for a small fixed set: 0, 0.0, \\"\\", [], {}, None, False."\n\n[[figure_attachments]]\nslug = "booleans"\nanchor = "cell-0"\nfigure = "boolean-truth-table"\ncaption = "`a and b` returns True only when both are True; otherwise it returns the first falsy value."\n\n[[figure_attachments]]\nslug = "sets"\nanchor = "cell-0"\nfigure = "set-buckets"\ncaption = "Sets are hash buckets without values; `x in s` averages O(1) regardless of size."\n\n[[figure_attachments]]\nslug = "tuples"\nanchor = "cell-3"\nfigure = "tuple-frozen"\ncaption = "Tuples are ordered, immutable sequences; positions matter, contents do not change once constructed."\n\n[[figure_attachments]]\nslug = "tuples"\nanchor = "cell-3"\nfigure = "list-append"\ncaption = "A list is the other intent: a variable number of similar items, growing in place with `.append`."\n\n[[figure_attachments]]\nslug = "values"\nanchor = "cell-0"\nfigure = "value-types"\ncaption = "Every literal is an object with a type; the type carries the behaviour, not the variable name."\n\n[[figure_attachments]]\nslug = "yield-from"\nanchor = "cell-0"\nfigure = "yield-delegation"\ncaption = "`yield from inner` delegates iteration to an inner generator; its yields surface here unchanged."\n\n[[figure_attachments]]\nslug = "itertools"\nanchor = "cell-0"\nfigure = "itertools-chain"\ncaption = "chain stitches two iterables into one stream without materialising either: values arrive lazily."\n\n[[figure_attachments]]\nslug = "assertions"\nanchor = "cell-0"\nfigure = "assertion-check"\ncaption = "assert tests a condition; True passes silently, False raises AssertionError with the optional message."\n\n[[figure_attachments]]\nslug = "custom-exceptions"\nanchor = "cell-0"\nfigure = "custom-exception-chain"\ncaption = "Subclassing an existing exception gains a domain name without changing semantics."\n\n[[figure_attachments]]\nslug = "exception-groups"\nanchor = "cell-0"\nfigure = "exception-group-peel"\ncaption = "except* peels matched leaves out of an ExceptionGroup; survivors regroup and propagate."\n\n[[figure_attachments]]\nslug = "delete-statements"\nanchor = "cell-0"\nfigure = "delete-name-erased"\ncaption = "`del x` removes the name; the object survives if any other reference holds it, otherwise gets collected."\n\n[[figure_attachments]]\nslug = "conditionals"\nanchor = "cell-0"\nfigure = "branch-fork"\ncaption = "A predicate sorts a value into one of several branches; if/elif/else is the explicit spelling."\n\n[[figure_attachments]]\nslug = "match-statements"\nanchor = "cell-0"\nfigure = "match-dispatch-ladder"\ncaption = "match dispatches by pattern shape; the value flows down the patterns and the first match wins."\n\n[[figure_attachments]]\nslug = "assignment-expressions"\nanchor = "cell-0"\nfigure = "naming-decisions"\ncaption = "The walrus binds a name during the surrounding expression; one expression, two outputs."\n\n[[figure_attachments]]\nslug = "iterating-over-iterables"\nanchor = "cell-0"\nfigure = "iter-protocol"\ncaption = "`for` desugars to iter()+next(): one iter() call, then next() until StopIteration ends the loop."\n\n[[figure_attachments]]\nslug = "generator-expressions"\nanchor = "cell-1"\nfigure = "lazy-stream"\ncaption = "A generator expression composes filter and map lazily; values flow only when next() pulls them."\n\n[[figure_attachments]]\nslug = "async-iteration-and-context"\nanchor = "cell-0"\nfigure = "async-swimlane"\ncaption = "async iteration and async with both rest on the same loop-vs-coroutine handoff as await."\n\n[[figure_attachments]]\nslug = "loop-else"\nanchor = "cell-0"\nfigure = "loop-else-gate"\ncaption = "The loop\'s else branch runs only when the loop falls through naturally; break skips it."\n\n[[figure_attachments]]\nslug = "break-and-continue"\nanchor = "cell-0"\nfigure = "early-exit"\ncaption = "break exits the loop; continue skips to the next iteration. Both interrupt the natural fall-through."\n\n[[figure_attachments]]\nslug = "comprehension-patterns"\nanchor = "cell-0"\nfigure = "comprehension-equivalence"\ncaption = "Nested clauses compose left to right; the comprehension is still equivalent to a for-loop with append."\n\n[[figure_attachments]]\nslug = "container-protocols"\nanchor = "cell-0"\nfigure = "container-methods"\ncaption = "Container syntax routes to narrow protocol methods: assignment to __setitem__, membership to __contains__, lookup to __getitem__."\n\n[[figure_attachments]]\nslug = "functions"\nanchor = "cell-0"\nfigure = "function-with-body"\ncaption = "A function takes inputs, evaluates a body, and returns a value: `greet(\'Ada\')` produces `\'Hello, Ada\'`."\n\n[[figure_attachments]]\nslug = "constants"\nanchor = "cell-0"\nfigure = "variables-bind"\ncaption = "UPPER_CASE is a naming convention, not a language constraint; the binding behaves like any other variable."\n\n[[figure_attachments]]\nslug = "while-loops"\nanchor = "cell-0"\nfigure = "while-backedge"\ncaption = "`while` repeats the body while the test stays true; the back-edge returns control to the test before each pass."\n\n[[figure_attachments]]\nslug = "while-loops"\nanchor = "cell-0"\nfigure = "loop-repetition"\ncaption = "Each loop shape has its own stopping rule: `for` ends when the iterable is exhausted, `while` when the condition turns false, sentinel iteration when the marker value appears."\n\n[[figure_attachments]]\nslug = "advanced-match-patterns"\nanchor = "cell-0"\nfigure = "match-pattern-variants"\ncaption = "Capture, alternative, guard, and class patterns each name a different way a value can match a case."\n\n[[figure_attachments]]\nslug = "literals"\nanchor = "cell-0"\nfigure = "literal-forms"\ncaption = "Each Python type has its own literal spellings; ints accept decimal, hex, and binary; strings accept either quote."\n\n[[figure_attachments]]\nslug = "packages"\nanchor = "cell-0"\nfigure = "package-tree"\ncaption = "A directory with __init__.py becomes an importable package; submodules and subpackages nest beneath it."\n\n[[figure_attachments]]\nslug = "virtual-environments"\nanchor = "cell-0"\nfigure = "venv-boundary"\ncaption = "A venv carries its own interpreter and site-packages, isolating a project\'s dependencies from the system."\n\n[[figure_attachments]]\nslug = "subprocesses"\nanchor = "cell-0"\nfigure = "subprocess-spawn"\ncaption = "subprocess.run spawns a child process and captures its stdout, stderr, and exit code as portable evidence."\n\n[[figure_attachments]]\nslug = "logging"\nanchor = "cell-0"\nfigure = "logging-levels"\ncaption = "Five severity levels; the logger\'s configured threshold drops everything below it."\n\n[[figure_attachments]]\nslug = "testing"\nanchor = "cell-0"\nfigure = "aaa-pattern"\ncaption = "arrange-act-assert: set up the state, perform the behavior under test, compare the result to expectations."\n\n[[figure_attachments]]\nslug = "networking"\nanchor = "cell-0"\nfigure = "socket-byte-boundary"\ncaption = "Text crosses the socket as bytes — `encode` marks the python → wire boundary, `decode` brings the bytes back to a Python `str`."\n\n[[figure_attachments]]\nslug = "threads-and-processes"\nanchor = "cell-0"\nfigure = "gil-lanes"\ncaption = "Threads share memory but the GIL serialises Python bytecode; processes run in parallel with isolated memory."\n\n[[figure_attachments]]\nslug = "casts-and-any"\nanchor = "cell-0"\nfigure = "cast-escape"\ncaption = "cast(T, x) tells the type checker to treat x as T; the runtime is unaffected."\n\n[[figure_attachments]]\nslug = "newtype"\nanchor = "cell-0"\nfigure = "newtype-phantom"\ncaption = "NewType creates a distinct static identity backed by the same runtime type — UserId is int with a name."\n\n[[figure_attachments]]\nslug = "overloads"\nanchor = "cell-0"\nfigure = "overload-signatures"\ncaption = "@overload declares static call signatures for double(int) and double(str); one runtime implementation handles both."\n\n[[figure_attachments]]\nslug = "paramspec"\nanchor = "cell-0"\nfigure = "paramspec-preserve"\ncaption = "ParamSpec preserves the wrapped function\'s signature through a decorator, parameter for parameter."\n\n[[figure_attachments]]\nslug = "literal-and-final"\nanchor = "cell-0"\nfigure = "literal-constrained"\ncaption = "Literal narrows a slot to a fixed set of constant values; Final says the binding will not change."\n\n[[figure_attachments]]\nslug = "callable-types"\nanchor = "cell-0"\nfigure = "callable-type"\ncaption = "A Callable annotation describes the callback slot: this argument list must produce this return type."\n\n[[figure_attachments]]\nslug = "runtime-type-checks"\nanchor = "cell-0"\nfigure = "isinstance-check"\ncaption = "isinstance and issubclass ask the runtime; the answer is a bool, not a static type refinement."\n\n[[figure_attachments]]\nslug = "collections-module"\nanchor = "cell-0"\nfigure = "collections-containers"\ncaption = "Four specialised containers for shapes the built-in types don\'t cover well: deque, Counter, defaultdict, namedtuple."\n\n[[figure_attachments]]\nslug = "structured-data-shapes"\nanchor = "cell-0"\nfigure = "structured-shapes"\ncaption = "The same record can be a mutable dataclass, an immutable NamedTuple, or a runtime dict described by TypedDict."\n\n[[figure_attachments]]\nslug = "csv-data"\nanchor = "cell-0"\nfigure = "csv-records"\ncaption = "CSV files are rows of records; each line has the same columns in the same order."\n\n[[figure_attachments]]\nslug = "warnings"\nanchor = "cell-0"\nfigure = "warning-signal"\ncaption = "A warning is a soft signal: the message is reported, but execution continues unless filters elevate it."\n\n[[figure_attachments]]\nslug = "object-lifecycle"\nanchor = "cell-0"\nfigure = "object-lifecycle"\ncaption = "Names keep the same object reachable; deleting one name matters only when it removes the last reference."\n\n# Journey-section figures keyed by the visible section title.\n[[journey_section_figures]]\nsection = "Start with executable evidence."\nfigure = "runtime-evidence-loop"\ncaption = "Examples are evidence loops: source, a run step, and visible output stay together."\n\n[[journey_section_figures]]\nsection = "Separate value, identity, and absence."\nfigure = "runtime-object-axes"\ncaption = "Runtime objects answer separate questions: equal value, same identity, or the singleton that marks absence."\n\n[[journey_section_figures]]\nsection = "Read expressions as object operations."\nfigure = "runtime-expression-model"\ncaption = "Expression syntax enters the data model; object methods produce the result."\n\n[[journey_section_figures]]\nsection = "Choose between paths."\nfigure = "control-decision-map"\ncaption = "Facts flow into one decision point; exactly one branch owns the next step."\n\n[[journey_section_figures]]\nsection = "Name and shape decisions."\nfigure = "control-fact-shape"\ncaption = "Name a fact when a condition needs it; match shape when the data structure is the decision."\n\n[[journey_section_figures]]\nsection = "Stop as soon as the answer is known."\nfigure = "control-stop-boundary"\ncaption = "Early exits draw a boundary: once the answer is found, the tail stays unread."\n\n[[journey_section_figures]]\nsection = "Choose the right loop shape."\nfigure = "iteration-loop-selector"\ncaption = "Choose the loop from its stopping rule: exhaustion, condition, or sentinel marker."\n\n[[journey_section_figures]]\nsection = "See the protocol behind `for`."\nfigure = "iteration-protocol-map"\ncaption = "for is surface syntax; iter() creates an iterator and next() pulls values until StopIteration."\n\n[[journey_section_figures]]\nsection = "Compose lazy value streams."\nfigure = "iteration-lazy-pull"\ncaption = "Lazy pipelines run from the consumer\'s pull: next() requests one value through each stage."\n\n[[journey_section_figures]]\nsection = "Pick the container that matches the question."\nfigure = "container-questions"\ncaption = "Each container answers a different question: ordered, fixed, lookup, unique."\n\n[[journey_section_figures]]\nsection = "Move between shapes deliberately."\nfigure = "reshape-pipeline"\ncaption = "Most everyday code reshapes data: one input, one transform, one new value."\n\n[[journey_section_figures]]\nsection = "Cross text and data boundaries."\nfigure = "text-data-boundary"\ncaption = "Programs receive text and produce structured data; parsing makes the boundary explicit."\n\n[[journey_section_figures]]\nsection = "Start with functions as named behavior."\nfigure = "function-signature"\ncaption = "A function is the first abstraction boundary: arguments in, body, return value out."\n\n[[journey_section_figures]]\nsection = "Use functions as values."\nfigure = "function-as-value"\ncaption = "Functions are first-class values. A second name binds to the same function object."\n\n[[journey_section_figures]]\nsection = "Bundle behavior with state."\nfigure = "class-with-state"\ncaption = "Classes group fields and methods so data and behavior move together behind one interface."\n\n[[journey_section_figures]]\nsection = "Keep runtime and static analysis separate."\nfigure = "type-runtime-static-split"\ncaption = "Runtime values run the program; static tools inspect separate annotations and report before execution."\n\n[[journey_section_figures]]\nsection = "Describe realistic data shapes."\nfigure = "type-shape-catalog"\ncaption = "Real data contracts combine fields, variants, and expected absence instead of one scalar type."\n\n[[journey_section_figures]]\nsection = "Scale annotations for reusable libraries."\nfigure = "type-library-contract"\ncaption = "Reusable APIs carry caller contracts through the library boundary with generics, parameters, and overloads."\n\n[[journey_section_figures]]\nsection = "Make failure explicit."\nfigure = "reliability-signal-map"\ncaption = "Different failure shapes need explicit signals: assertions, recovery, chained causes, or warnings."\n\n[[journey_section_figures]]\nsection = "Control resource and module boundaries."\nfigure = "reliability-boundary-map"\ncaption = "Reliable programs name their boundaries: resources clean up, modules import, environments constrain runtime."\n\n[[journey_section_figures]]\nsection = "Handle operations that outlive one expression."\nfigure = "reliability-operation-boundary"\ncaption = "Async, threaded, test, and logging work cross an operation boundary before evidence comes back."\n\n# Curated scores for example-cell figures.\n[[example_figure_scores]]\nslug = "variables"\nscore = 9.5\ncomment = "the canonical name → object picture"\n\n[[example_figure_scores]]\nslug = "mutability"\nscore = 9.5\ncomment = "three-state small multiple of aliased mutation"\n\n[[example_figure_scores]]\nslug = "copying-collections"\nscore = 9.5\ncomment = "same picture as mutability, perfect match"\n\n[[example_figure_scores]]\nslug = "hello-world"\nscore = 9.0\ncomment = "program → output, smallest mechanism"\n\n[[example_figure_scores]]\nslug = "numbers"\nscore = 9.0\ncomment = "int unbounded vs float thinning, both registers"\n\n[[example_figure_scores]]\nslug = "operators"\nscore = 9.0\ncomment = "expression tree mechanism"\n\n[[example_figure_scores]]\nslug = "none"\nscore = 9.0\ncomment = "three names converging on one None"\n\n[[example_figure_scores]]\nslug = "equality-and-identity"\nscore = 9.0\ncomment = "shared vs separate object, side-by-side"\n\n[[example_figure_scores]]\nslug = "strings"\nscore = 9.0\ncomment = "codepoints + bytes registers"\n\n[[example_figure_scores]]\nslug = "for-loops"\nscore = 9.0\ncomment = "4-row caret advance"\n\n[[example_figure_scores]]\nslug = "sorting"\nscore = 9.0\ncomment = "stability ribbons preserved across keys"\n\n[[example_figure_scores]]\nslug = "keyword-only-arguments"\nscore = 9.0\ncomment = "signature with explicit `*` separator"\n\n[[example_figure_scores]]\nslug = "positional-only-parameters"\nscore = 9.0\ncomment = "signature with explicit `/` separator"\n\n[[example_figure_scores]]\nslug = "closures"\nscore = 9.0\ncomment = "captured cell reference"\n\n[[example_figure_scores]]\nslug = "scope-global-nonlocal"\nscore = 9.0\ncomment = "LEGB nested rings"\n\n[[example_figure_scores]]\nslug = "recursion"\nscore = 9.0\ncomment = "stacked frames with same name, different argument"\n\n[[example_figure_scores]]\nslug = "lists"\nscore = 9.0\ncomment = "cells with append mechanism"\n\n[[example_figure_scores]]\nslug = "dicts"\nscore = 9.0\ncomment = "hash buckets with collision chain"\n\n[[example_figure_scores]]\nslug = "slices"\nscore = 9.0\ncomment = "ruler with bracket overlay"\n\n[[example_figure_scores]]\nslug = "comprehensions"\nscore = 9.0\ncomment = "comprehension over equivalent for-loop"\n\n[[example_figure_scores]]\nslug = "type-hints"\nscore = 9.0\ncomment = "ghost annotations over runtime values"\n\n[[example_figure_scores]]\nslug = "generators"\nscore = 9.0\ncomment = "ribbon cut by yield gates"\n\n[[example_figure_scores]]\nslug = "exceptions"\nscore = 9.0\ncomment = "try/except/else/finally lanes with traced path"\n\n[[example_figure_scores]]\nslug = "context-managers"\nscore = 9.0\ncomment = "enter / body / exit bowtie"\n\n[[example_figure_scores]]\nslug = "async-await"\nscore = 9.0\ncomment = "loop/coro swimlane with await handoffs"\n\n[[example_figure_scores]]\nslug = "classes"\nscore = 9.0\ncomment = "instance/class/type triangle"\n\n[[example_figure_scores]]\nslug = "inheritance-and-super"\nscore = 9.0\ncomment = "MRO chain with diamond ghost"\n\n[[example_figure_scores]]\nslug = "dataclasses"\nscore = 9.0\ncomment = "fields → generated __init__ signature"\n\n[[example_figure_scores]]\nslug = "decorators"\nscore = 9.0\ncomment = "before/after rebinding through cell"\n\n[[example_figure_scores]]\nslug = "special-methods"\nscore = 9.0\ncomment = "syntax → method dispatch"\n\n[[example_figure_scores]]\nslug = "unpacking"\nscore = 9.0\ncomment = "binding-line mechanism with *rest"\n\n[[example_figure_scores]]\nslug = "exception-chaining"\nscore = 9.0\ncomment = "__cause__ vs __context__ distinguished"\n\n[[example_figure_scores]]\nslug = "iterating-over-iterables"\nscore = 9.0\ncomment = "iter() exposes the iterator"\n\n[[example_figure_scores]]\nslug = "iterators"\nscore = 9.0\ncomment = "three-state machine"\n\n[[example_figure_scores]]\nslug = "iterator-vs-iterable"\nscore = 9.0\ncomment = "the protocol exposed"\n\n[[example_figure_scores]]\nslug = "container-protocols"\nscore = 9.0\ncomment = "syntax routes to __setitem__, __contains__, __getitem__"\n\n[[example_figure_scores]]\nslug = "operator-overloading"\nscore = 9.0\ncomment = "dispatch arrow"\n\n[[example_figure_scores]]\nslug = "union-and-optional-types"\nscore = 9.0\ncomment = "type fork to several shapes"\n\n[[example_figure_scores]]\nslug = "abstract-base-classes"\nscore = 9.0\ncomment = "same triangle as concrete classes"\n\n[[example_figure_scores]]\nslug = "conditionals"\nscore = 9.0\ncomment = "predicate forks value to branch"\n\n[[example_figure_scores]]\nslug = "match-statements"\nscore = 9.0\ncomment = "dispatch ladder; first match wins"\n\n[[example_figure_scores]]\nslug = "advanced-match-patterns"\nscore = 9.0\ncomment = "four pattern variants"\n\n[[example_figure_scores]]\nslug = "loop-else"\nscore = 9.0\ncomment = "fell-through vs broke, two outcomes"\n\n[[example_figure_scores]]\nslug = "while-loops"\nscore = 9.0\ncomment = "back-edge mechanism plus the three stopping rules"\n\n[[example_figure_scores]]\nslug = "type-aliases"\nscore = 9.0\ncomment = "complex annotation collapses to a name"\n\n[[example_figure_scores]]\nslug = "typed-dicts"\nscore = 9.0\ncomment = "keys with declared value types"\n\n[[example_figure_scores]]\nslug = "comprehension-patterns"\nscore = 9.0\ncomment = "nested clauses compose"\n\n[[example_figure_scores]]\nslug = "lambdas"\nscore = 9.0\ncomment = "function literal: params / expression"\n\n[[example_figure_scores]]\nslug = "string-formatting"\nscore = 9.0\ncomment = "format-spec railroad"\n\n[[example_figure_scores]]\nslug = "regular-expressions"\nscore = 9.0\ncomment = "pattern ruler with anchors"\n\n[[example_figure_scores]]\nslug = "json"\nscore = 9.0\ncomment = "two-column type mapping"\n\n[[example_figure_scores]]\nslug = "metaclasses"\nscore = 9.0\ncomment = "extended triangle to metaclass"\n\n[[example_figure_scores]]\nslug = "datetime"\nscore = 9.0\ncomment = "one instant, two clock offsets"\n\n[[example_figure_scores]]\nslug = "values"\nscore = 9.0\ncomment = "every literal is a typed object"\n\n[[example_figure_scores]]\nslug = "literals"\nscore = 9.0\ncomment = "literal spellings per type"\n\n[[example_figure_scores]]\nslug = "booleans"\nscore = 9.0\ncomment = "2×2 truth table"\n\n[[example_figure_scores]]\nslug = "sets"\nscore = 9.0\ncomment = "hash buckets without values"\n\n[[example_figure_scores]]\nslug = "yield-from"\nscore = 9.0\ncomment = "stitched ribbons; delegation"\n\n[[example_figure_scores]]\nslug = "generator-expressions"\nscore = 9.0\ncomment = "lazy filter→map pipeline"\n\n[[example_figure_scores]]\nslug = "async-iteration-and-context"\nscore = 9.0\ncomment = "loop/coro lanes with await yields"\n\n[[example_figure_scores]]\nslug = "assignment-expressions"\nscore = 9.0\ncomment = "walrus binds while comparing"\n\n[[example_figure_scores]]\nslug = "break-and-continue"\nscore = 9.0\ncomment = "early exit at first match"\n\n[[example_figure_scores]]\nslug = "delete-statements"\nscore = 9.0\ncomment = "name erased; object survives if referenced"\n\n[[example_figure_scores]]\nslug = "exception-groups"\nscore = 9.0\ncomment = "except* peels matching leaves"\n\n[[example_figure_scores]]\nslug = "custom-exceptions"\nscore = 9.0\ncomment = "subclass chain to a domain name"\n\n[[example_figure_scores]]\nslug = "modules"\nscore = 9.0\ncomment = "sys.path resolution; first hit wins"\n\n[[example_figure_scores]]\nslug = "protocols"\nscore = 9.0\ncomment = "structural duck check"\n\n[[example_figure_scores]]\nslug = "enums"\nscore = 9.0\ncomment = "closed set of symbolic values"\n\n[[example_figure_scores]]\nslug = "functions"\nscore = 9.0\ncomment = "specific call: greet(\'Ada\') → \'Hello, Ada\'"\n\n[[example_figure_scores]]\nslug = "constants"\nscore = 9.0\ncomment = "name binding; UPPER_CASE is convention"\n\n[[example_figure_scores]]\nslug = "import-aliases"\nscore = 9.0\ncomment = "two names bind to the same module"\n\n[[example_figure_scores]]\nslug = "number-parsing"\nscore = 9.0\ncomment = "int() success path vs ValueError"\n\n[[example_figure_scores]]\nslug = "tuples"\nscore = 9.0\ncomment = "frozen sequence with struck-through .append"\n\n[[example_figure_scores]]\nslug = "truthiness"\nscore = 9.0\ncomment = "bool(x) with the falsy set as a strip"\n\n[[example_figure_scores]]\nslug = "itertools"\nscore = 9.0\ncomment = "chain joins two iterables into one stream"\n\n[[example_figure_scores]]\nslug = "assertions"\nscore = 9.0\ncomment = "True passes, False raises"\n\n[[example_figure_scores]]\nslug = "descriptors"\nscore = 9.0\ncomment = "get/set/delete protocol routed through descriptor"\n\n[[example_figure_scores]]\nslug = "attribute-access"\nscore = 9.0\ncomment = "instance __dict__ → class __dict__ → __getattr__"\n\n[[example_figure_scores]]\nslug = "bound-and-unbound-methods"\nscore = 9.0\ncomment = "instance.method bound vs Class.method unbound"\n\n[[example_figure_scores]]\nslug = "classmethods-and-staticmethods"\nscore = 9.0\ncomment = "three method kinds, three first-arg conventions"\n\n[[example_figure_scores]]\nslug = "callable-objects"\nscore = 9.0\ncomment = "__call__ makes any object callable"\n\n[[example_figure_scores]]\nslug = "generics-and-typevar"\nscore = 9.0\ncomment = "the same T flows in and out"\n\n[[example_figure_scores]]\nslug = "truth-and-size"\nscore = 9.0\ncomment = "__bool__ → __len__ → True fallback chain"\n\n[[example_figure_scores]]\nslug = "bytes-and-bytearray"\nscore = 9.0\ncomment = "frozen vs mutable contrast"\n\n[[example_figure_scores]]\nslug = "sentinel-iteration"\nscore = 9.0\ncomment = "iter(callable, sentinel) stop condition"\n\n[[example_figure_scores]]\nslug = "partial-functions"\nscore = 9.0\ncomment = "f → partial(f, 1) → g"\n\n[[example_figure_scores]]\nslug = "guard-clauses"\nscore = 9.0\ncomment = "early returns, main body at the tail"\n\n[[example_figure_scores]]\nslug = "packages"\nscore = 9.0\ncomment = "__init__.py + nested submodules"\n\n[[example_figure_scores]]\nslug = "virtual-environments"\nscore = 9.0\ncomment = "project / venv boundary"\n\n[[example_figure_scores]]\nslug = "subprocesses"\nscore = 9.0\ncomment = "spawn → child → captured output"\n\n[[example_figure_scores]]\nslug = "logging"\nscore = 9.0\ncomment = "five thresholded levels"\n\n[[example_figure_scores]]\nslug = "testing"\nscore = 9.0\ncomment = "arrange-act-assert three-row pattern"\n\n[[example_figure_scores]]\nslug = "networking"\nscore = 9.0\ncomment = "text ↔ bytes across the socket boundary"\n\n[[example_figure_scores]]\nslug = "casts-and-any"\nscore = 9.0\ncomment = "Any → cast(T, x) → T, runtime unchanged"\n\n[[example_figure_scores]]\nslug = "newtype"\nscore = 9.0\ncomment = "same runtime, distinct static identity"\n\n[[example_figure_scores]]\nslug = "paramspec"\nscore = 9.0\ncomment = "P preserved through decorator"\n\n[[example_figure_scores]]\nslug = "literal-and-final"\nscore = 9.0\ncomment = "slot narrows to a fixed set"\n\n[[example_figure_scores]]\nslug = "runtime-type-checks"\nscore = 9.0\ncomment = "isinstance returns bool"\n\n[[example_figure_scores]]\nslug = "collections-module"\nscore = 9.0\ncomment = "deque / Counter / defaultdict / namedtuple"\n\n[[example_figure_scores]]\nslug = "structured-data-shapes"\nscore = 9.0\ncomment = "dataclass vs NamedTuple vs TypedDict runtime trade-offs"\n\n[[example_figure_scores]]\nslug = "csv-data"\nscore = 9.0\ncomment = "rows × columns; same shape per line"\n\n[[example_figure_scores]]\nslug = "warnings"\nscore = 9.0\ncomment = "soft signal; execution continues"\n\n[[example_figure_scores]]\nslug = "object-lifecycle"\nscore = 9.0\ncomment = "names keep object reachable until last reference disappears"\n\n[[example_figure_scores]]\nslug = "args-and-kwargs"\nscore = 9.0\ncomment = "*args tuple, **kwargs dict regions"\n\n[[example_figure_scores]]\nslug = "multiple-return-values"\nscore = 9.0\ncomment = "function returns tuple; caller unpacks"\n\n[[example_figure_scores]]\nslug = "properties"\nscore = 9.0\ncomment = "obj.x routes through fget instead of __dict__"\n\n[[example_figure_scores]]\nslug = "overloads"\nscore = 9.0\ncomment = "static overload signatures contrasted with one runtime body"\n\n[[example_figure_scores]]\nslug = "callable-types"\nscore = 9.0\ncomment = "callback slot shows argument list and return type"\n\n[[example_figure_scores]]\nslug = "threads-and-processes"\nscore = 9.0\ncomment = "thread GIL sharing contrasted with process isolation"\n\n# Curated scores for journey-section figures.\n[[journey_section_figure_scores]]\nsection = "Start with executable evidence."\nscore = 9.0\ncomment = "journey-native source/run/output evidence loop"\n\n[[journey_section_figure_scores]]\nsection = "Separate value, identity, and absence."\nscore = 9.0\ncomment = "three runtime questions separated"\n\n[[journey_section_figure_scores]]\nsection = "Read expressions as object operations."\nscore = 9.0\ncomment = "syntax enters the data-model method surface"\n\n[[journey_section_figure_scores]]\nsection = "Choose between paths."\nscore = 9.0\ncomment = "branch map independent of one if-statement example"\n\n[[journey_section_figure_scores]]\nsection = "Name and shape decisions."\nscore = 9.0\ncomment = "name-vs-shape decision map"\n\n[[journey_section_figure_scores]]\nsection = "Stop as soon as the answer is known."\nscore = 9.0\ncomment = "early boundary leaves tail unread"\n\n[[journey_section_figure_scores]]\nsection = "Choose the right loop shape."\nscore = 9.0\ncomment = "loop choice by stopping rule"\n\n[[journey_section_figure_scores]]\nsection = "See the protocol behind `for`."\nscore = 9.5\ncomment = "for surface mapped to iter()/next()/StopIteration"\n\n[[journey_section_figure_scores]]\nsection = "Compose lazy value streams."\nscore = 9.0\ncomment = "consumer pull drives the lazy pipeline"\n\n[[journey_section_figure_scores]]\nsection = "Pick the container that matches the question."\nscore = 9.0\ncomment = "list/tuple/dict/set per question"\n\n[[journey_section_figure_scores]]\nsection = "Move between shapes deliberately."\nscore = 9.0\ncomment = "input → transform → result"\n\n[[journey_section_figure_scores]]\nsection = "Cross text and data boundaries."\nscore = 9.0\ncomment = "text in, structured value out"\n\n[[journey_section_figure_scores]]\nsection = "Start with functions as named behavior."\nscore = 9.0\ncomment = "concrete call, named body, and return boundary"\n\n[[journey_section_figure_scores]]\nsection = "Use functions as values."\nscore = 9.0\ncomment = "second name binds same function"\n\n[[journey_section_figure_scores]]\nsection = "Bundle behavior with state."\nscore = 9.0\ncomment = "class groups state + methods"\n\n[[journey_section_figure_scores]]\nsection = "Keep runtime and static analysis separate."\nscore = 9.0\ncomment = "runtime track separated from static-tool track"\n\n[[journey_section_figure_scores]]\nsection = "Describe realistic data shapes."\nscore = 9.0\ncomment = "field, variant, and absence contracts in one map"\n\n[[journey_section_figure_scores]]\nsection = "Scale annotations for reusable libraries."\nscore = 9.0\ncomment = "caller contracts survive library API boundary"\n\n[[journey_section_figure_scores]]\nsection = "Make failure explicit."\nscore = 9.0\ncomment = "failure shapes mapped to explicit signals"\n\n[[journey_section_figure_scores]]\nsection = "Control resource and module boundaries."\nscore = 9.0\ncomment = "resource/module/env boundaries shown together"\n\n[[journey_section_figure_scores]]\nsection = "Handle operations that outlive one expression."\nscore = 9.0\ncomment = "operation boundary returns evidence later"\n\n# Curated example quality scores.\n[[example_quality_scores]]\nslug = "hello-world"\nscore = 7.1\ncomment = "waived: traditional smallest complete program"\n\n[[example_quality_scores]]\nslug = "values"\nscore = 9.0\ncomment = "object/type/operation map with prerequisite graph edges"\n\n[[example_quality_scores]]\nslug = "literals"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich, note-heavy, multi-cell"\n\n[[example_quality_scores]]\nslug = "numbers"\nscore = 9.0\ncomment = "graph-rich, note-heavy"\n\n[[example_quality_scores]]\nslug = "booleans"\nscore = 9.0\ncomment = "truth operations, short-circuiting, bool-as-int footgun"\n\n[[example_quality_scores]]\nslug = "operators"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich, note-heavy, multi-cell"\n\n[[example_quality_scores]]\nslug = "none"\nscore = 9.0\ncomment = "None, mapping default, and exception absence boundaries"\n\n[[example_quality_scores]]\nslug = "variables"\nscore = 9.0\ncomment = "binding, rebinding, augmented-assignment, lifecycle graph"\n\n[[example_quality_scores]]\nslug = "constants"\nscore = 9.0\ncomment = "constant convention, Final boundary, runtime rebinding evidence"\n\n[[example_quality_scores]]\nslug = "truthiness"\nscore = 9.0\ncomment = "truth-value categories, explicit-comparison boundary, graph-linked"\n\n[[example_quality_scores]]\nslug = "equality-and-identity"\nscore = 9.0\ncomment = "== versus is, singleton check, identity-cache warning"\n\n[[example_quality_scores]]\nslug = "mutability"\nscore = 9.0\ncomment = "in-place mutation, rebinding, alias visibility"\n\n[[example_quality_scores]]\nslug = "object-lifecycle"\nscore = 9.0\ncomment = "references, rebinding, and last-reference boundary"\n\n[[example_quality_scores]]\nslug = "strings"\nscore = 9.0\ncomment = "Unicode text, immutability, encoding boundary"\n\n[[example_quality_scores]]\nslug = "bytes-and-bytearray"\nscore = 9.0\ncomment = "graph-rich, note-heavy"\n\n[[example_quality_scores]]\nslug = "string-formatting"\nscore = 9.0\ncomment = "f-string expression, format spec, debug/repr boundary"\n\n[[example_quality_scores]]\nslug = "conditionals"\nscore = 9.0\ncomment = "branch ordering, truthiness, and ternary boundary"\n\n[[example_quality_scores]]\nslug = "guard-clauses"\nscore = 9.0\ncomment = "nested contrast plus flattened guard path"\n\n[[example_quality_scores]]\nslug = "assignment-expressions"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "for-loops"\nscore = 9.0\ncomment = "direct iteration, range, and enumerate progression"\n\n[[example_quality_scores]]\nslug = "break-and-continue"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "loop-else"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "iterating-over-iterables"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "iterators"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "iterator-vs-iterable"\nscore = 9.0\ncomment = "graph-rich"\n\n[[example_quality_scores]]\nslug = "sentinel-iteration"\nscore = 9.0\ncomment = "call-until-marker shape contrasted with manual while"\n\n[[example_quality_scores]]\nslug = "match-statements"\nscore = 9.0\ncomment = "shape dispatch and guarded pattern payoff"\n\n[[example_quality_scores]]\nslug = "advanced-match-patterns"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "while-loops"\nscore = 9.0\ncomment = "state-driven repetition contrasted with for loops"\n\n[[example_quality_scores]]\nslug = "lists"\nscore = 9.0\ncomment = "ordered mutable sequence operations plus tuple/set/copy boundaries"\n\n[[example_quality_scores]]\nslug = "tuples"\nscore = 9.0\ncomment = "graph-rich, note-heavy"\n\n[[example_quality_scores]]\nslug = "unpacking"\nscore = 9.0\ncomment = "sequence, starred, and mapping unpacking shapes"\n\n[[example_quality_scores]]\nslug = "dicts"\nscore = 9.0\ncomment = "lookup/default/update/delete dictionary boundaries"\n\n[[example_quality_scores]]\nslug = "sets"\nscore = 9.0\ncomment = "uniqueness, membership, set algebra, ordering boundary"\n\n[[example_quality_scores]]\nslug = "slices"\nscore = 9.0\ncomment = "range bounds, step, reverse, and unchanged-source evidence"\n\n[[example_quality_scores]]\nslug = "comprehensions"\nscore = 9.0\ncomment = "loop-equivalent collection building with filter/projection boundaries"\n\n[[example_quality_scores]]\nslug = "comprehension-patterns"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "sorting"\nscore = 9.0\ncomment = "key functions, reverse order, sorted/list.sort boundary"\n\n[[example_quality_scores]]\nslug = "collections-module"\nscore = 9.0\ncomment = "Counter, defaultdict, deque, namedtuple mapped to data shapes"\n\n[[example_quality_scores]]\nslug = "copying-collections"\nscore = 9.0\ncomment = "alias, shallow copy, and deepcopy boundaries"\n\n[[example_quality_scores]]\nslug = "functions"\nscore = 9.0\ncomment = "definition/call/return/default-boundary walkthrough"\n\n[[example_quality_scores]]\nslug = "keyword-only-arguments"\nscore = 9.0\ncomment = "call-site readability and boolean flag boundary"\n\n[[example_quality_scores]]\nslug = "positional-only-parameters"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "args-and-kwargs"\nscore = 9.0\ncomment = "flexible argument collection plus forwarding/API-boundary graph"\n\n[[example_quality_scores]]\nslug = "multiple-return-values"\nscore = 9.0\ncomment = "tuple return plus unpacking boundary"\n\n[[example_quality_scores]]\nslug = "closures"\nscore = 9.0\ncomment = "closed-over state, factory payoff, late-binding boundary"\n\n[[example_quality_scores]]\nslug = "partial-functions"\nscore = 9.0\ncomment = "before/after callable adaptation and introspection"\n\n[[example_quality_scores]]\nslug = "scope-global-nonlocal"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "recursion"\nscore = 9.0\ncomment = "base case and recursive tree-shape payoff"\n\n[[example_quality_scores]]\nslug = "lambdas"\nscore = 9.0\ncomment = "expression callable use contrasted with named def reuse"\n\n[[example_quality_scores]]\nslug = "generators"\nscore = 9.0\ncomment = "graph-rich, note-heavy"\n\n[[example_quality_scores]]\nslug = "yield-from"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "generator-expressions"\nscore = 9.0\ncomment = "eager list contrast, lazy one-pass consumption, reducer use"\n\n[[example_quality_scores]]\nslug = "itertools"\nscore = 9.0\ncomment = "lazy standard-library pipeline and iterator-composition payoff"\n\n[[example_quality_scores]]\nslug = "decorators"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "classes"\nscore = 9.0\ncomment = "graph-rich, note-heavy"\n\n[[example_quality_scores]]\nslug = "inheritance-and-super"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "classmethods-and-staticmethods"\nscore = 9.0\ncomment = "graph-rich, note-heavy"\n\n[[example_quality_scores]]\nslug = "dataclasses"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "properties"\nscore = 9.0\ncomment = "managed attribute API without caller syntax change"\n\n[[example_quality_scores]]\nslug = "special-methods"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich, note-heavy, multi-cell"\n\n[[example_quality_scores]]\nslug = "truth-and-size"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "container-protocols"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "callable-objects"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "operator-overloading"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "attribute-access"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "bound-and-unbound-methods"\nscore = 9.0\ncomment = "graph-rich, note-heavy"\n\n[[example_quality_scores]]\nslug = "descriptors"\nscore = 9.0\ncomment = "descriptor lookup, __set_name__, and validation mechanics"\n\n[[example_quality_scores]]\nslug = "metaclasses"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "context-managers"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich, note-heavy"\n\n[[example_quality_scores]]\nslug = "delete-statements"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "exceptions"\nscore = 9.0\ncomment = "specific handling, else/finally cleanup, broad-catch boundary"\n\n[[example_quality_scores]]\nslug = "assertions"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "exception-chaining"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "exception-groups"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "warnings"\nscore = 9.0\ncomment = "capture and escalate soft failures with filters"\n\n[[example_quality_scores]]\nslug = "modules"\nscore = 9.0\ncomment = "graph-rich, note-heavy"\n\n[[example_quality_scores]]\nslug = "import-aliases"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich, note-heavy"\n\n[[example_quality_scores]]\nslug = "packages"\nscore = 9.0\ncomment = "graph-rich, note-heavy"\n\n[[example_quality_scores]]\nslug = "virtual-environments"\nscore = 9.0\ncomment = "standard venv workflow plus explicit Worker deployment boundary"\n\n[[example_quality_scores]]\nslug = "type-hints"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich, note-heavy, multi-cell"\n\n[[example_quality_scores]]\nslug = "runtime-type-checks"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "union-and-optional-types"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "type-aliases"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "typed-dicts"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "structured-data-shapes"\nscore = 9.0\ncomment = "graph-rich, note-heavy"\n\n[[example_quality_scores]]\nslug = "literal-and-final"\nscore = 9.0\ncomment = "Literal value set, Final rebinding promise, runtime caveat"\n\n[[example_quality_scores]]\nslug = "callable-types"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "generics-and-typevar"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "paramspec"\nscore = 9.0\ncomment = "Callable erasure contrasted with ParamSpec-preserving decorator"\n\n[[example_quality_scores]]\nslug = "overloads"\nscore = 9.0\ncomment = "static overload stubs contrasted with one runtime implementation"\n\n[[example_quality_scores]]\nslug = "casts-and-any"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "newtype"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "protocols"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "abstract-base-classes"\nscore = 9.0\ncomment = "graph-rich, note-heavy"\n\n[[example_quality_scores]]\nslug = "enums"\nscore = 9.0\ncomment = "closed symbolic choice set contrasted with raw strings"\n\n[[example_quality_scores]]\nslug = "regular-expressions"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich, note-heavy, multi-cell"\n\n[[example_quality_scores]]\nslug = "number-parsing"\nscore = 9.0\ncomment = "decimal, explicit base, and recoverable ValueError boundary"\n\n[[example_quality_scores]]\nslug = "custom-exceptions"\nscore = 9.0\ncomment = "domain error naming, raise point, recovery boundary"\n\n[[example_quality_scores]]\nslug = "json"\nscore = 9.0\ncomment = "graph-rich, note-heavy"\n\n[[example_quality_scores]]\nslug = "logging"\nscore = 9.0\ncomment = "logger, handler, formatter, and threshold boundaries"\n\n[[example_quality_scores]]\nslug = "testing"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "subprocesses"\nscore = 9.0\ncomment = "standard subprocess contract plus explicit Worker boundary"\n\n[[example_quality_scores]]\nslug = "threads-and-processes"\nscore = 9.0\ncomment = "thread/process executor contrast plus explicit Worker boundary"\n\n[[example_quality_scores]]\nslug = "networking"\nscore = 9.0\ncomment = "protocol byte boundary plus explicit socket runtime caveat"\n\n[[example_quality_scores]]\nslug = "datetime"\nscore = 9.0\ncomment = "date/time/delta parsing with timezone scope made explicit"\n\n[[example_quality_scores]]\nslug = "csv-data"\nscore = 9.0\ncomment = "DictReader, conversion, and DictWriter row boundary"\n\n[[example_quality_scores]]\nslug = "async-await"\nscore = 9.0\ncomment = "graph-rich, note-heavy"\n\n[[example_quality_scores]]\nslug = "async-iteration-and-context"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n'
+REGISTRY_TOML = '# Quality and editorial registries.\n#\n# Source of truth for rubric checks, journey structure, edge labels,\n# figure attachments/captions, and curated scores. Executable paint\n# functions stay in `src/marginalia.py`; mutable editorial data lives here.\n\n[[confusable_pairs]]\nname = "__str__ vs __repr__"\nowner = "special-methods"\ntokens = ["__str__", "__repr__"]\n\n[[confusable_pairs]]\nname = "is vs =="\nowner = "equality-and-identity"\ntokens = [" is ", "=="]\n\n[[confusable_pairs]]\nname = "list vs tuple"\nowner = "tuples"\ntokens = ["list", "tuple"]\n\n[[confusable_pairs]]\nname = "classmethod vs staticmethod vs instance method"\nowner = "classmethods-and-staticmethods"\ntokens = ["@classmethod", "@staticmethod", "self"]\n\n[[confusable_pairs]]\nname = "isinstance vs type=="\nowner = "runtime-type-checks"\ntokens = ["isinstance(", "type("]\n\n[[confusable_pairs]]\nname = "generator vs class iterator"\nowner = "generators"\ntokens = ["yield", "__next__"]\n\n[[confusable_pairs]]\nname = "iterator vs iterable"\nowner = "iterator-vs-iterable"\ntokens = ["iterable", "iterator", "iter("]\n\n[[confusable_pairs]]\nname = "mutable vs immutable class attributes"\nowner = "classes"\ntokens = ["class attribute", "__init__"]\n\n[[confusable_pairs]]\nname = "eager vs lazy production"\nowner = "generators"\ntokens = ["return", "yield"]\n\n[[confusable_pairs]]\nname = "Protocol vs ABC"\nowner = "abstract-base-classes"\ntokens = ["Protocol", "ABC"]\n\n[[confusable_pairs]]\nname = "dataclass vs NamedTuple vs TypedDict"\nowner = "structured-data-shapes"\ntokens = ["@dataclass", "NamedTuple", "TypedDict"]\n\n[[confusable_pairs]]\nname = "bound vs unbound methods"\nowner = "bound-and-unbound-methods"\ntokens = ["bound method", "Class.method"]\n\n[[confusable_pairs]]\nname = "yield vs return"\nowner = "generators"\ntokens = ["yield", "return"]\n\n[[confusable_pairs]]\nname = "shallow vs deep copy"\nowner = "copying-collections"\ntokens = ["copy(", "deepcopy("]\n\n[[confusable_pairs]]\nname = "sync vs async functions"\nowner = "async-await"\ntokens = ["async def", "def "]\n\n[broad_surface_tours]\n\n[broad_surface_tours.special-methods]\nrequired_tokens = [\n  "__init__", "__repr__", "__str__", "__eq__", "__hash__", "__lt__",\n  "__len__", "__iter__", "__contains__", "__getitem__", "__setitem__",\n  "__call__", "__enter__", "__exit__", "__bool__",\n]\n\n[broad_surface_tours.operators]\nrequired_tokens = ["+", "==", " is ", " in ", "and", "or", "&", ":="]\n\n[broad_surface_tours.type-hints]\nrequired_tokens = ["list[", " | ", "Optional", "TypeAlias"]\n\n[broad_surface_tours.testing]\nrequired_tokens = ["TestCase", "assertEqual", "assertRaises", "setUp"]\n\n[broad_surface_tours.async-await]\nrequired_tokens = ["async def", "await", "asyncio.run", "asyncio.gather", "async for", "async with"]\n\n[broad_surface_tours.packages]\nrequired_tokens = ["__init__.py", "from .", "__all__"]\n\n[broad_surface_tours.regular-expressions]\nrequired_tokens = ["re.match", "re.search", "re.findall", "re.compile", "re.IGNORECASE", "re.sub"]\n\n[broad_surface_tours.literals]\nrequired_tokens = ["0x", "0b", "_", "f\\"", "True", "None"]\n\n[[footguns]]\nname = "Mutable default class attribute"\nowner = "classes"\nbroken_tokens = ["items = []"]\nfixed_tokens = ["self.items = []"]\n\n[[footguns]]\nname = "Mutable default function argument"\nowner = "functions"\nbroken_tokens = ["items=[]", "append_broken"]\nfixed_tokens = ["items=None", "append_fixed"]\n\n[[footguns]]\nname = "Late-binding closure in a loop"\nowner = "closures"\nbroken_tokens = ["lambda: i", "[2, 2, 2]"]\nfixed_tokens = ["lambda i=i", "[0, 1, 2]"]\n\n[[footguns]]\nname = "Integer identity caching"\nowner = "equality-and-identity"\nbroken_tokens = ["small_a is small_b", "big_a is big_b"]\nfixed_tokens = ["big_a == big_b", "small-integer cache"]\n\n[[footguns]]\nname = "Shallow vs deep copy"\nowner = "copying-collections"\nbroken_tokens = ["copy("]\nfixed_tokens = ["deepcopy("]\n\n[[footguns]]\nname = "Generator one-pass exhaustion"\nowner = "generators"\nbroken_tokens = ["yield"]\nfixed_tokens = ["list("]\n\n[[footguns]]\nname = "Dictionary mutation during iteration"\nowner = "dicts"\nbroken_tokens = ["for ", "del "]\nfixed_tokens = ["list(", ".keys("]\n\n[[footguns]]\nname = "Floating-point equality"\nowner = "numbers"\nbroken_tokens = ["0.1", "0.2"]\nfixed_tokens = ["isclose", "math"]\n\n[[footguns]]\nname = "bool as a subclass of int"\nowner = "booleans"\nbroken_tokens = ["isinstance(True, int)", "True + True"]\nfixed_tokens = ["not isinstance(value, bool)", "is_strict_int"]\n\n[[footguns]]\nname = "Bare except swallowing KeyboardInterrupt"\nowner = "exceptions"\nbroken_tokens = ["except Exception"]\nfixed_tokens = ["except ValueError"]\n\n[paired_pages]\n# Pages whose titles differ only by a suffix or modifier; at least one\n# member of each pair must demonstrate the relationship in a cell.\npairs = [\n  ["iterators", "iterating-over-iterables"],\n  ["iterators", "iterator-vs-iterable"],\n  ["generators", "generator-expressions"],\n  ["comprehensions", "comprehension-patterns"],\n]\n\n[paired_pages.cell_tokens]\n"iterators|iterating-over-iterables" = ["iterable", "iterator"]\n"iterators|iterator-vs-iterable" = ["iterable", "iterator", "iter("]\n"generators|generator-expressions" = ["generator", "expression"]\n"comprehensions|comprehension-patterns" = ["nested loops", "explicit loop"]\n\n[quality_gates]\nexample_target = 9.0\nexample_hard_min = 8.5\njourney_section_min = 8.5\njourney_average_min = 8.8\n\n[quality_waivers.hello-world]\naccepted_min = 7.0\nreason = "Traditional first example is intentionally tiny: program -> output is the goal, not a full concept tour."\nexpires = "2026-12-01"\n\n[no_figure_rationales]\n# Slugs may be added here only when the page is constraint-shaped,\n# infrastructure-shaped, or aggregator-shaped and a single mechanism\n# figure would distort the lesson. A weak figure is redrawn, not removed:\n# a page that had a figure keeps one. Current production attaches\n# figures to every example, so this registry is intentionally empty.\n\n[journey_outcomes]\n\n[journey_outcomes."runtime::Start with executable evidence."]\njourney = "runtime"\nsection = "Start with executable evidence."\nsupport = [\n  "hello-world",\n  "values",\n  "literals",\n  "variables",\n  "constants",\n]\noutcomes = [\n  "start with a complete program and its output",\n  "see that Python programs manipulate runtime objects",\n  "write small values directly in source code",\n  "understand that names bind to objects rather than storing values themselves",\n]\n\n[journey_outcomes."runtime::Separate value, identity, and absence."]\njourney = "runtime"\nsection = "Separate value, identity, and absence."\nsupport = [\n  "none",\n  "booleans",\n  "truthiness",\n  "equality-and-identity",\n  "mutability",\n  "object-lifecycle",\n]\noutcomes = [\n  "represent expected absence with a singleton object",\n  "combine facts with boolean operators",\n  "predict how objects behave in boolean contexts",\n  "distinguish value equality from object identity",\n]\n\n[journey_outcomes."runtime::Read expressions as object operations."]\njourney = "runtime"\nsection = "Read expressions as object operations."\nsupport = [\n  "numbers",\n  "operators",\n  "strings",\n  "string-formatting",\n  "bytes-and-bytearray",\n]\noutcomes = [\n  "use numeric objects and arithmetic operators",\n  "combine, compare, and test values with expression syntax",\n  "treat text as Unicode rather than raw bytes",\n  "turn objects into readable text at output boundaries",\n]\n\n[journey_outcomes."control-flow::Choose between paths."]\njourney = "control-flow"\nsection = "Choose between paths."\nsupport = [\n  "booleans",\n  "truthiness",\n  "operators",\n  "conditionals",\n]\noutcomes = [\n  "combine facts into readable conditions",\n  "use object truth values without hiding intent",\n  "build comparisons and boolean expressions for conditions",\n  "choose between branches with clear predicates",\n]\n\n[journey_outcomes."control-flow::Name and shape decisions."]\njourney = "control-flow"\nsection = "Name and shape decisions."\nsupport = [\n  "assignment-expressions",\n  "match-statements",\n  "advanced-match-patterns",\n]\noutcomes = [\n  "name an intermediate value inside a condition when it improves clarity",\n  "dispatch on the shape of data rather than only on boolean tests",\n  "combine destructuring, alternatives, and guards in pattern matching",\n]\n\n[journey_outcomes."control-flow::Stop as soon as the answer is known."]\njourney = "control-flow"\nsection = "Stop as soon as the answer is known."\nsupport = [\n  "guard-clauses",\n  "assertions",\n  "exceptions",\n]\noutcomes = [\n  "show how early returns reduce nested conditional code",\n  "state assumptions that should fail loudly while developing",\n  "leave the current path when ordinary return values are not enough",\n]\n\n[journey_outcomes."iteration::Choose the right loop shape."]\njourney = "iteration"\nsection = "Choose the right loop shape."\nsupport = [\n  "for-loops",\n  "while-loops",\n  "break-and-continue",\n  "loop-else",\n  "sentinel-iteration",\n]\noutcomes = [\n  "consume values from an iterable",\n  "repeat while a condition must be rechecked",\n  "interrupt or skip loop work intentionally",\n  "attach completion logic to loops that did not break",\n]\n\n[journey_outcomes."iteration::See the protocol behind `for`."]\njourney = "iteration"\nsection = "See the protocol behind `for`."\nsupport = [\n  "iterating-over-iterables",\n  "iterator-vs-iterable",\n  "iterators",\n  "generators",\n]\noutcomes = [\n  "separate value producers from value consumers",\n  "use `iter()` and `next()` to expose the protocol behind `for`",\n  "write functions that produce values lazily",\n]\n\n[journey_outcomes."iteration::Compose lazy value streams."]\njourney = "iteration"\nsection = "Compose lazy value streams."\nsupport = [\n  "generator-expressions",\n  "itertools",\n  "yield-from",\n]\noutcomes = [\n  "create lazy one-pass streams with expression syntax",\n  "compose iterator streams without materializing every value",\n  "delegate part of a generator to another iterable",\n]\n\n[journey_outcomes."shapes::Pick the container that matches the question."]\njourney = "shapes"\nsection = "Pick the container that matches the question."\nsupport = [\n  "lists",\n  "tuples",\n  "dicts",\n  "sets",\n  "collections-module",\n]\noutcomes = [\n  "store ordered mutable data",\n  "group fixed-position values",\n  "look up values by key",\n  "model uniqueness and membership",\n]\n\n[journey_outcomes."shapes::Move between shapes deliberately."]\njourney = "shapes"\nsection = "Move between shapes deliberately."\nsupport = [\n  "unpacking",\n  "slices",\n  "comprehensions",\n  "comprehension-patterns",\n  "sorting",\n  "copying-collections",\n]\noutcomes = [\n  "bind names from structured values",\n  "select ranges from sequences",\n  "build concrete collections from compact loops",\n  "compose filters and nested transformations",\n]\n\n[journey_outcomes."shapes::Cross text and data boundaries."]\njourney = "shapes"\nsection = "Cross text and data boundaries."\nsupport = [\n  "number-parsing",\n  "json",\n  "regular-expressions",\n  "datetime",\n  "csv-data",\n]\noutcomes = [\n  "turn text into numbers safely",\n  "move structured data across a text boundary",\n  "extract structure from text patterns",\n  "represent dates, times, and durations as typed values",\n]\n\n[journey_outcomes."interfaces::Start with functions as named behavior."]\njourney = "interfaces"\nsection = "Start with functions as named behavior."\nsupport = [\n  "functions",\n  "keyword-only-arguments",\n  "positional-only-parameters",\n  "args-and-kwargs",\n  "multiple-return-values",\n]\noutcomes = [\n  "package behavior behind a name",\n  "make important call-site choices explicit",\n  "hide parameter names that should remain implementation details",\n  "accept flexible call shapes when forwarding or adapting APIs",\n]\n\n[journey_outcomes."interfaces::Use functions as values."]\njourney = "interfaces"\nsection = "Use functions as values."\nsupport = [\n  "scope-global-nonlocal",\n  "closures",\n  "recursion",\n  "lambdas",\n  "decorators",\n  "partial-functions",\n]\noutcomes = [\n  "control where assignment happens",\n  "capture state in nested functions",\n  "solve self-similar problems with a base case",\n  "write small unnamed functions for expression positions",\n]\n\n[journey_outcomes."interfaces::Bundle behavior with state."]\njourney = "interfaces"\nsection = "Bundle behavior with state."\nsupport = [\n  "classes",\n  "inheritance-and-super",\n  "dataclasses",\n  "properties",\n  "classmethods-and-staticmethods",\n  "special-methods",\n  "truth-and-size",\n  "container-protocols",\n  "callable-objects",\n  "operator-overloading",\n  "attribute-access",\n  "bound-and-unbound-methods",\n  "descriptors",\n  "metaclasses",\n]\noutcomes = [\n  "bundle state and behavior into a new object type",\n  "reuse and extend behavior through parent classes",\n  "generate common methods for data containers",\n  "keep attribute syntax while adding computation or validation",\n]\n\n[journey_outcomes."types::Keep runtime and static analysis separate."]\njourney = "types"\nsection = "Keep runtime and static analysis separate."\nsupport = [\n  "type-hints",\n  "protocols",\n  "abstract-base-classes",\n  "enums",\n  "runtime-type-checks",\n]\noutcomes = [\n  "document expected types and feed type checkers",\n  "describe required behavior by structural shape",\n  "name a fixed set of symbolic values",\n  "show `type()`, `isinstance()`, and `issubclass()` without turning Python into Java",\n]\n\n[journey_outcomes."types::Describe realistic data shapes."]\njourney = "types"\nsection = "Describe realistic data shapes."\nsupport = [\n  "union-and-optional-types",\n  "type-aliases",\n  "typed-dicts",\n  "structured-data-shapes",\n  "literal-and-final",\n  "callable-types",\n]\noutcomes = [\n  "show `X | Y` and `None`-aware APIs",\n  "name complex types with `type` statements or aliases",\n  "type dictionary records that come from JSON",\n  "express constrained values and names that should not be rebound",\n]\n\n[journey_outcomes."types::Scale annotations for reusable libraries."]\njourney = "types"\nsection = "Scale annotations for reusable libraries."\nsupport = [\n  "generics-and-typevar",\n  "paramspec",\n  "overloads",\n  "casts-and-any",\n  "newtype",\n]\noutcomes = [\n  "write reusable typed containers and functions",\n  "preserve callable signatures through decorators",\n  "describe APIs whose return type depends on the input shape",\n  "show escape hatches and their tradeoffs",\n]\n\n[journey_outcomes."reliability::Make failure explicit."]\njourney = "reliability"\nsection = "Make failure explicit."\nsupport = [\n  "exceptions",\n  "assertions",\n  "exception-chaining",\n  "exception-groups",\n  "custom-exceptions",\n  "warnings",\n]\noutcomes = [\n  "signal and recover from errors",\n  "state internal assumptions",\n  "preserve the cause while translating an error",\n  "handle multiple failures together",\n]\n\n[journey_outcomes."reliability::Control resource and module boundaries."]\njourney = "reliability"\nsection = "Control resource and module boundaries."\nsupport = [\n  "context-managers",\n  "delete-statements",\n  "modules",\n  "import-aliases",\n  "packages",\n  "virtual-environments",\n]\noutcomes = [\n  "pair setup with reliable cleanup",\n  "remove names, attributes, and items intentionally",\n  "split code into importable files",\n  "make imported names clear at use sites",\n]\n\n[journey_outcomes."reliability::Handle operations that outlive one expression."]\njourney = "reliability"\nsection = "Handle operations that outlive one expression."\nsupport = [\n  "async-await",\n  "async-iteration-and-context",\n  "logging",\n  "testing",\n  "subprocesses",\n  "threads-and-processes",\n  "networking",\n]\noutcomes = [\n  "await concurrent I/O-shaped work",\n  "consume async streams and cleanup protocols",\n  "record operational events without using `print()`",\n  "write deterministic tests with `unittest` or `pytest`",\n]\n\n[score_model]\n# Criterion weights mirror docs/example-quality-rubric.md. The registry\n# makes the scoring model inspectable even before every example is broken\n# down into per-criterion subscores.\nconceptual_payoff = 1.0\nrationale = 0.75\nalternatives_and_boundaries = 0.75\nexecutable_determinism = 1.0\npython_idiom_and_accuracy = 1.0\nliterate_fit = 0.75\nsource_result_pairing = 0.75\nconcept_decomposition = 0.75\nprogressive_walkthrough = 0.75\nrepresentative_coverage = 0.75\npractical_usefulness = 0.75\neditorial_progression = 1.0\n\n# Editorial registries loaded by the site at runtime.\n# Keep prose, captions, scores, journey ordering, and edge labels here;\n# keep executable paint functions in src/marginalia.py.\n\n[[journeys]]\nslug = "runtime"\ntitle = "Runtime"\nsummary = "This journey builds the smallest coherent model of Python at runtime: programs run statements, names refer to objects, objects have types, and operations ask those objects to do work."\n\n[[journeys.sections]]\ntitle = "Start with executable evidence."\nsummary = "Learners first need to see that every page is a runnable program with visible output."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "hello-world"\ndescription = "start with a complete program and its output"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "values"\ndescription = "see that Python programs manipulate runtime objects"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "literals"\ndescription = "write small values directly in source code"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "variables"\ndescription = "understand that names bind to objects rather than storing values themselves"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "constants"\ndescription = "learn the convention Python uses for values that should not change"\n\n[[journeys.sections]]\ntitle = "Separate value, identity, and absence."\nsummary = "This section prevents early confusion about equality, object identity, missing values, and truth tests."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "none"\ndescription = "represent expected absence with a singleton object"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "booleans"\ndescription = "combine facts with boolean operators"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "truthiness"\ndescription = "predict how objects behave in boolean contexts"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "equality-and-identity"\ndescription = "distinguish value equality from object identity"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "mutability"\ndescription = "predict when operations change an object in place"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "object-lifecycle"\ndescription = "explain references, garbage collection, and why identity can outlive a single name"\n\n[[journeys.sections]]\ntitle = "Read expressions as object operations."\nsummary = "This section connects operators, text, and formatting to Python\'s data model."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "numbers"\ndescription = "use numeric objects and arithmetic operators"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "operators"\ndescription = "combine, compare, and test values with expression syntax"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "strings"\ndescription = "treat text as Unicode rather than raw bytes"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "string-formatting"\ndescription = "turn objects into readable text at output boundaries"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "bytes-and-bytearray"\ndescription = "contrast text with binary data and explicit decoding"\n\n[[journeys]]\nslug = "control-flow"\ntitle = "Control Flow"\nsummary = "This journey follows how a Python program chooses which path runs, names facts at decision points, and exits early when the remaining work no longer applies."\n\n[[journeys.sections]]\ntitle = "Choose between paths."\nsummary = "Start with ordinary branching and boolean predicates before reaching for more compact forms."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "booleans"\ndescription = "combine facts into readable conditions"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "truthiness"\ndescription = "use object truth values without hiding intent"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "operators"\ndescription = "build comparisons and boolean expressions for conditions"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "conditionals"\ndescription = "choose between branches with clear predicates"\n\n[[journeys.sections]]\ntitle = "Name and shape decisions."\nsummary = "Some branches become clearer when the code names an intermediate value or dispatches on data shape."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "assignment-expressions"\ndescription = "name an intermediate value inside a condition when it improves clarity"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "match-statements"\ndescription = "dispatch on the shape of data rather than only on boolean tests"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "advanced-match-patterns"\ndescription = "combine destructuring, alternatives, and guards in pattern matching"\n\n[[journeys.sections]]\ntitle = "Stop as soon as the answer is known."\nsummary = "Early exits make the successful path easier to read by moving exceptional or completed cases out of the way."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "guard-clauses"\ndescription = "show how early returns reduce nested conditional code"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "assertions"\ndescription = "state assumptions that should fail loudly while developing"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "exceptions"\ndescription = "leave the current path when ordinary return values are not enough"\n\n[[journeys]]\nslug = "iteration"\ntitle = "Iteration"\nsummary = "This journey follows repeated work from ordinary loops to the iterator protocol: consume values, stop deliberately, and produce lazy streams only when they help."\n\n[[journeys.sections]]\ntitle = "Choose the right loop shape."\nsummary = "Loops differ by what they consume, when they stop, and whether completion itself carries meaning."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "for-loops"\ndescription = "consume values from an iterable"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "while-loops"\ndescription = "repeat while a condition must be rechecked"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "break-and-continue"\ndescription = "interrupt or skip loop work intentionally"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "loop-else"\ndescription = "attach completion logic to loops that did not break"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "sentinel-iteration"\ndescription = "show `iter(callable, sentinel)` for repeated reads until a marker appears"\n\n[[journeys.sections]]\ntitle = "See the protocol behind `for`."\nsummary = "The important mental shift is that loops consume producers through a protocol rather than special-casing lists."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "iterating-over-iterables"\ndescription = "separate value producers from value consumers"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "iterator-vs-iterable"\ndescription = "distinguish re-iterable collections from one-pass iterators"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "iterators"\ndescription = "use `iter()` and `next()` to expose the protocol behind `for`"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "generators"\ndescription = "write functions that produce values lazily"\n\n[[journeys.sections]]\ntitle = "Compose lazy value streams."\nsummary = "Iterator pipelines are useful when code can transform values one at a time instead of materializing every intermediate result."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "generator-expressions"\ndescription = "create lazy one-pass streams with expression syntax"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "itertools"\ndescription = "compose iterator streams without materializing every value"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "yield-from"\ndescription = "delegate part of a generator to another iterable"\n\n[[journeys]]\nslug = "shapes"\ntitle = "Shapes"\nsummary = "This journey teaches the core Python habit of choosing a data shape, transforming it directly, and making the result visible."\n\n[[journeys.sections]]\ntitle = "Pick the container that matches the question."\nsummary = "Lists, tuples, dictionaries, and sets answer different questions about order, position, lookup, and uniqueness."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "lists"\ndescription = "store ordered mutable data"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "tuples"\ndescription = "group fixed-position values"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "dicts"\ndescription = "look up values by key"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "sets"\ndescription = "model uniqueness and membership"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "collections-module"\ndescription = "show `deque`, `Counter`, `defaultdict`, and `namedtuple` as specialized shapes"\n\n[[journeys.sections]]\ntitle = "Move between shapes deliberately."\nsummary = "Most everyday Python code is data reshaping, so learners need the idioms for selecting, unpacking, and rebuilding values."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "unpacking"\ndescription = "bind names from structured values"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "slices"\ndescription = "select ranges from sequences"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "comprehensions"\ndescription = "build concrete collections from compact loops"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "comprehension-patterns"\ndescription = "compose filters and nested transformations"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "sorting"\ndescription = "order records with key functions"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "copying-collections"\ndescription = "contrast shallow copies, deep copies, and shared nested data"\n\n[[journeys.sections]]\ntitle = "Cross text and data boundaries."\nsummary = "Programs often receive text and produce structured data, so parsing and serialization belong in the data journey."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "number-parsing"\ndescription = "turn text into numbers safely"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "json"\ndescription = "move structured data across a text boundary"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "regular-expressions"\ndescription = "extract structure from text patterns"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "datetime"\ndescription = "represent dates, times, and durations as typed values"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "csv-data"\ndescription = "show row-shaped text data and dictionary records"\n\n[[journeys]]\nslug = "interfaces"\ntitle = "Interfaces"\nsummary = "This journey shows how Python grows from simple functions to callable APIs, object interfaces, protocols, and metaclasses."\n\n[[journeys.sections]]\ntitle = "Start with functions as named behavior."\nsummary = "Functions are the first abstraction boundary because they name behavior and control how callers provide information."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "functions"\ndescription = "package behavior behind a name"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "keyword-only-arguments"\ndescription = "make important call-site choices explicit"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "positional-only-parameters"\ndescription = "hide parameter names that should remain implementation details"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "args-and-kwargs"\ndescription = "accept flexible call shapes when forwarding or adapting APIs"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "multiple-return-values"\ndescription = "return multiple related values as a tuple"\n\n[[journeys.sections]]\ntitle = "Use functions as values."\nsummary = "Python functions can capture state, be passed around, and wrap other functions."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "scope-global-nonlocal"\ndescription = "control where assignment happens"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "closures"\ndescription = "capture state in nested functions"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "recursion"\ndescription = "solve self-similar problems with a base case"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "lambdas"\ndescription = "write small unnamed functions for expression positions"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "decorators"\ndescription = "wrap behavior without changing call sites"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "partial-functions"\ndescription = "show how to pre-fill arguments with `functools.partial`"\n\n[[journeys.sections]]\ntitle = "Bundle behavior with state."\nsummary = "Classes become useful when data and behavior need to move together behind a stable interface."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "classes"\ndescription = "bundle state and behavior into a new object type"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "inheritance-and-super"\ndescription = "reuse and extend behavior through parent classes"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "dataclasses"\ndescription = "generate common methods for data containers"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "properties"\ndescription = "keep attribute syntax while adding computation or validation"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "classmethods-and-staticmethods"\ndescription = "choose between instance, class, and static behavior on a class"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "special-methods"\ndescription = "connect objects to Python syntax and built-ins"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "truth-and-size"\ndescription = "make objects work with truth tests and `len()`"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "container-protocols"\ndescription = "support membership, lookup, and assignment syntax"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "callable-objects"\ndescription = "make stateful instances callable like functions"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "operator-overloading"\ndescription = "define operators only when the operation is unsurprising"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "attribute-access"\ndescription = "customize fallback lookup and assignment carefully"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "bound-and-unbound-methods"\ndescription = "explain how attribute access turns a function into a bound method"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "descriptors"\ndescription = "explain the protocol behind methods, properties, and managed attributes"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "metaclasses"\ndescription = "customize class creation when ordinary class tools are not enough"\n\n[[journeys]]\nslug = "types"\ntitle = "Types"\nsummary = "This journey maps Python\'s runtime object model to optional static annotations so learners know what types can and cannot promise."\n\n[[journeys.sections]]\ntitle = "Keep runtime and static analysis separate."\nsummary = "The first lesson is that annotations describe expectations for tools while ordinary Python objects still run the program."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "type-hints"\ndescription = "document expected types and feed type checkers"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "protocols"\ndescription = "describe required behavior by structural shape"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "abstract-base-classes"\ndescription = "contrast runtime-enforced nominal interfaces with structural protocols"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "enums"\ndescription = "name a fixed set of symbolic values"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "runtime-type-checks"\ndescription = "show `type()`, `isinstance()`, and `issubclass()` without turning Python into Java"\n\n[[journeys.sections]]\ntitle = "Describe realistic data shapes."\nsummary = "Typed Python becomes useful when annotations explain optional values, unions, callables, and JSON-like records."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "union-and-optional-types"\ndescription = "show `X | Y` and `None`-aware APIs"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "type-aliases"\ndescription = "name complex types with `type` statements or aliases"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "typed-dicts"\ndescription = "type dictionary records that come from JSON"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "structured-data-shapes"\ndescription = "choose between dataclass, NamedTuple, and TypedDict for records"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "literal-and-final"\ndescription = "express constrained values and names that should not be rebound"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "callable-types"\ndescription = "type functions that are passed as arguments"\n\n[[journeys.sections]]\ntitle = "Scale annotations for reusable libraries."\nsummary = "Advanced typing exists to preserve information across reusable functions, containers, and decorators."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "generics-and-typevar"\ndescription = "write reusable typed containers and functions"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "paramspec"\ndescription = "preserve callable signatures through decorators"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "overloads"\ndescription = "describe APIs whose return type depends on the input shape"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "casts-and-any"\ndescription = "show escape hatches and their tradeoffs"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "newtype"\ndescription = "create distinct static identities for runtime-compatible values"\n\n[[journeys]]\nslug = "reliability"\ntitle = "Reliability"\nsummary = "This journey follows the boundaries where programs fail, clean up, split into modules, communicate with the outside world, and run concurrent work."\n\n[[journeys.sections]]\ntitle = "Make failure explicit."\nsummary = "Robust Python code distinguishes expected absence, broken assumptions, recoverable errors, and domain-specific failures."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "exceptions"\ndescription = "signal and recover from errors"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "assertions"\ndescription = "state internal assumptions"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "exception-chaining"\ndescription = "preserve the cause while translating an error"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "exception-groups"\ndescription = "handle multiple failures together"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "custom-exceptions"\ndescription = "name failures in the language of the problem domain"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "warnings"\ndescription = "signal soft problems and deprecations"\n\n[[journeys.sections]]\ntitle = "Control resource and module boundaries."\nsummary = "Cleanup, deletion, imports, and modules define where responsibilities begin and end."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "context-managers"\ndescription = "pair setup with reliable cleanup"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "delete-statements"\ndescription = "remove names, attributes, and items intentionally"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "modules"\ndescription = "split code into importable files"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "import-aliases"\ndescription = "make imported names clear at use sites"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "packages"\ndescription = "show package directories, `__init__.py`, and public module boundaries"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "virtual-environments"\ndescription = "isolate dependencies for a project"\n\n[[journeys.sections]]\ntitle = "Handle operations that outlive one expression."\nsummary = "I/O, testing, logging, subprocesses, and concurrency require different control boundaries from ordinary expressions."\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "async-await"\ndescription = "await concurrent I/O-shaped work"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "async-iteration-and-context"\ndescription = "consume async streams and cleanup protocols"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "logging"\ndescription = "record operational events without using `print()`"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "testing"\ndescription = "write deterministic tests with `unittest` or `pytest`"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "subprocesses"\ndescription = "run external commands safely"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "threads-and-processes"\ndescription = "contrast concurrency choices beyond `asyncio`"\n\n[[journeys.sections.items]]\nkind = "example"\nvalue = "networking"\ndescription = "make HTTP or socket boundaries explicit"\n\n# Explicit see_also edge labels; default labels are inferred in src/app.py.\n[[see_also_edge_labels]]\nsource = "break-and-continue"\ntarget = "loop-else"\nlabel = "contrast"\n\n[[see_also_edge_labels]]\nsource = "assignment-expressions"\ntarget = "conditionals"\nlabel = "contrast"\n\n[[see_also_edge_labels]]\nsource = "yield-from"\ntarget = "generators"\nlabel = "prerequisite"\n\n[[see_also_edge_labels]]\nsource = "async-iteration-and-context"\ntarget = "async-await"\nlabel = "prerequisite"\n\n[[see_also_edge_labels]]\nsource = "delete-statements"\ntarget = "mutability"\nlabel = "shared mechanism"\n\n[[see_also_edge_labels]]\nsource = "positional-only-parameters"\ntarget = "keyword-only-arguments"\nlabel = "contrast"\n\n[[see_also_edge_labels]]\nsource = "assertions"\ntarget = "exceptions"\nlabel = "alternative"\n\n[[see_also_edge_labels]]\nsource = "exception-chaining"\ntarget = "exceptions"\nlabel = "builds on"\n\n[[see_also_edge_labels]]\nsource = "exception-groups"\ntarget = "exceptions"\nlabel = "alternative"\n\n[[see_also_edge_labels]]\nsource = "operators"\ntarget = "numbers"\nlabel = "related syntax"\n\n[[see_also_edge_labels]]\nsource = "operators"\ntarget = "booleans"\nlabel = "condition building"\n\n[[see_also_edge_labels]]\nsource = "operators"\ntarget = "assignment-expressions"\nlabel = "specialized expression"\n\n[[see_also_edge_labels]]\nsource = "literals"\ntarget = "values"\nlabel = "value surface"\n\n[[see_also_edge_labels]]\nsource = "literals"\ntarget = "strings"\nlabel = "text literal"\n\n[[see_also_edge_labels]]\nsource = "literals"\ntarget = "sets"\nlabel = "container literal"\n\n# Example-cell figure attachments. figure names refer to FIGURES paint functions.\n[[figure_attachments]]\nslug = "mutability"\nanchor = "cell-0"\nfigure = "aliasing-mutation"\ncaption = "Two names share one mutable list — appending through one name changes the object visible through both."\n\n[[figure_attachments]]\nslug = "mutability"\nanchor = "cell-0"\nfigure = "tuple-no-mutation"\ncaption = "By contrast, a tuple is frozen — its contents cannot change in place, so aliasing carries no mutation hazard."\n\n[[figure_attachments]]\nslug = "variables"\nanchor = "cell-0"\nfigure = "variables-bind"\ncaption = "A name is a label that points at an object. Assignment binds the label; the object exists independently."\n\n[[figure_attachments]]\nslug = "lists"\nanchor = "cell-0"\nfigure = "list-append"\ncaption = "Lists are mutable sequences. `.append` extends the same list object — no new list is created."\n\n[[figure_attachments]]\nslug = "dicts"\nanchor = "cell-0"\nfigure = "dict-buckets"\ncaption = "hash(key) picks the slot: \\"year\\" lands in an empty one, and profile[\\"name\\"] goes straight to its slot without scanning the other entries."\n\n[[figure_attachments]]\nslug = "unpacking"\nanchor = "cell-0"\nfigure = "unpacking-bind"\ncaption = "Left-side names bind to right-side positions; `*rest` gathers the middle into a list."\n\n[[figure_attachments]]\nslug = "comprehensions"\nanchor = "cell-0"\nfigure = "comprehension-equivalence"\ncaption = "A comprehension is a compact spelling of the equivalent for-loop with append, made into one expression."\n\n[[figure_attachments]]\nslug = "classes"\nanchor = "cell-0"\nfigure = "class-triangle"\ncaption = "Every Python value sits on the instance → class → type triangle; the metaclass is the type of the class."\n\n[[figure_attachments]]\nslug = "inheritance-and-super"\nanchor = "cell-0"\nfigure = "mro-chain"\ncaption = "Multiple inheritance forms a graph; C3 linearisation flattens it into the MRO Python uses for attribute lookup."\n\n[[figure_attachments]]\nslug = "dataclasses"\nanchor = "cell-0"\nfigure = "dataclass-fields"\ncaption = "Field declarations become the generated __init__ signature: declaration is the constructor."\n\n[[figure_attachments]]\nslug = "special-methods"\nanchor = "cell-0"\nfigure = "operator-dispatch"\ncaption = "Operators are method calls. `a + b` dispatches to `a.__add__(b)`; the data model exposes the syntax."\n\n[[figure_attachments]]\nslug = "decorators"\nanchor = "cell-0"\nfigure = "decorator-rebind"\ncaption = "@dec rebinds the name to wrapper(f₀); the original function survives only in the wrapper\'s closure cell."\n\n[[figure_attachments]]\nslug = "recursion"\nanchor = "cell-1"\nfigure = "call-stack"\ncaption = "At the leaf with value 4, three frames of total are stacked, each waiting on the one below; unwinding returns 4, then 3 + 4 = 7, then 1 + 2 + 7 = 10."\n\n[[figure_attachments]]\nslug = "exception-chaining"\nanchor = "cell-0"\nfigure = "exception-cause-context"\ncaption = "`raise X from Y` sets `__cause__` (explicit); raising during except sets `__context__` (implicit)."\n\n[[figure_attachments]]\nslug = "hello-world"\nanchor = "cell-0"\nfigure = "program-output"\ncaption = "Every Python program starts as source and produces text on standard output. The smallest mental model."\n\n[[figure_attachments]]\nslug = "numbers"\nanchor = "cell-0"\nfigure = "number-lines"\ncaption = "Ints have unbounded precision; floats use IEEE doubles whose representable values thin out near the extremes."\n\n[[figure_attachments]]\nslug = "operators"\nanchor = "cell-0"\nfigure = "expression-tree"\ncaption = "An expression like `(2 + 3) * 4` parses as a tree; operator precedence and parentheses determine its shape."\n\n[[figure_attachments]]\nslug = "none"\nanchor = "cell-0"\nfigure = "none-singleton"\ncaption = "`None` is a single object: every name that points at None points at the same object."\n\n[[figure_attachments]]\nslug = "equality-and-identity"\nanchor = "cell-0"\nfigure = "identity-and-equality"\ncaption = "Two names can share one object (`is` and `==` both true) or hold two equal-but-distinct objects (only `==` true)."\n\n[[figure_attachments]]\nslug = "strings"\nanchor = "cell-0"\nfigure = "codepoints-bytes"\ncaption = "Strings are sequences of Unicode codepoints. UTF-8 encoding turns them into bytes; `é` takes two bytes, `c` takes one."\n\n[[figure_attachments]]\nslug = "for-loops"\nanchor = "cell-1"\nfigure = "iterator-unroll"\ncaption = "Each call to next() advances the caret one cell along the iterable — the same shape behind range(), strings, and any sequence."\n\n[[figure_attachments]]\nslug = "sorting"\nanchor = "cell-1"\nfigure = "sort-stability"\ncaption = "Python\'s sort is stable: items with equal keys keep their original order, so chained sorts compose predictably."\n\n[[figure_attachments]]\nslug = "keyword-only-arguments"\nanchor = "cell-0"\nfigure = "kw-only-separator"\ncaption = "A bare `*` divides positional or keyword arguments from keyword-only ones; callers must pass `c` and `d` by name."\n\n[[figure_attachments]]\nslug = "positional-only-parameters"\nanchor = "cell-0"\nfigure = "positional-only-separator"\ncaption = "A bare `/` divides positional-only arguments from positional-or-keyword ones; callers cannot name `a` or `b`."\n\n[[figure_attachments]]\nslug = "positional-only-parameters"\nanchor = "cell-0"\nfigure = "kw-only-separator"\ncaption = "In the same signature, the bare `*` works the other way: parameters after it, such as `clamp`, must be named at the call site."\n\n[[figure_attachments]]\nslug = "closures"\nanchor = "cell-0"\nfigure = "closure-cell"\ncaption = "make_multiplier(2) has returned, but the function object double names still points into that frame\'s cell, so the captured factor outlives the call."\n\n[[figure_attachments]]\nslug = "scope-global-nonlocal"\nanchor = "cell-0"\nfigure = "scope-rings"\ncaption = "Name lookup walks LEGB — local, enclosing, global, built-in — outward, returning the first binding it finds."\n\n[[figure_attachments]]\nslug = "generators"\nanchor = "cell-0"\nfigure = "generator-resume"\ncaption = "The cell\'s two next() calls on countdown(3), one timeline each: every call resumes the body to the next yield gate, and the local n survives the pause."\n\n[[figure_attachments]]\nslug = "type-hints"\nanchor = "cell-0"\nfigure = "annotation-ghost"\ncaption = "Annotations describe expected types for tools; the runtime accepts any object regardless."\n\n[[figure_attachments]]\nslug = "exceptions"\nanchor = "cell-0"\nfigure = "exception-lanes"\ncaption = "try, except, else, and finally as parallel lanes; a single coral path traces what actually runs."\n\n[[figure_attachments]]\nslug = "context-managers"\nanchor = "cell-0"\nfigure = "context-bowtie"\ncaption = "A context manager pairs setup with reliable cleanup; the raise path still routes through __exit__."\n\n[[figure_attachments]]\nslug = "async-await"\nanchor = "cell-1"\nfigure = "async-swimlane"\ncaption = "On await, the coroutine yields to the loop; the loop runs other work and resumes when the awaitable is ready."\n\n[[figure_attachments]]\nslug = "iterators"\nanchor = "cell-0"\nfigure = "iter-protocol"\ncaption = "iter() exposes the iterator behind for; next() pulls one value at a time until exhausted."\n\n[[figure_attachments]]\nslug = "slices"\nanchor = "cell-0"\nfigure = "slice-ruler"\ncaption = "Slice indices sit between cells; [:3] and [3:] partition the sequence at index 3, never overlapping or losing an item."\n\n[[figure_attachments]]\nslug = "operator-overloading"\nanchor = "cell-0"\nfigure = "operator-dispatch"\ncaption = "Defining `__add__` on a class lets `+` dispatch into the class\'s own behavior."\n\n[[figure_attachments]]\nslug = "iterator-vs-iterable"\nanchor = "cell-0"\nfigure = "iter-protocol"\ncaption = "An iterable knows how to produce an iterator (via iter()); the iterator knows how to produce values (via next())."\n\n[[figure_attachments]]\nslug = "iterator-vs-iterable"\nanchor = "cell-1"\nfigure = "iterator-unroll"\ncaption = "The iterator\'s caret only moves forward — after the first `list(stream)` drains it, nothing is left for the second."\n\n[[figure_attachments]]\nslug = "type-aliases"\nanchor = "cell-0"\nfigure = "type-alias-name"\ncaption = "A type alias names a complex annotation once so call sites read as the domain meaning, not the type composition."\n\n[[figure_attachments]]\nslug = "typed-dicts"\nanchor = "cell-0"\nfigure = "typed-dict-shape"\ncaption = "TypedDict gives each key a typed value, so `obj[\'x\']` is checked against the declared shape."\n\n[[figure_attachments]]\nslug = "union-and-optional-types"\nanchor = "cell-0"\nfigure = "union-types"\ncaption = "`int | str | None` says one slot may hold any of three shapes — including expected absence."\n\n[[figure_attachments]]\nslug = "generics-and-typevar"\nanchor = "cell-0"\nfigure = "generic-preservation"\ncaption = "A generic preserves the input type through the call: the same T flows in and out of fn[T]."\n\n[[figure_attachments]]\nslug = "abstract-base-classes"\nanchor = "cell-0"\nfigure = "class-triangle"\ncaption = "An ABC sits on the same triangle as concrete classes; subclasses inherit the abstract methods they must implement."\n\n[[figure_attachments]]\nslug = "copying-collections"\nanchor = "cell-0"\nfigure = "aliasing-mutation"\ncaption = "Without copy() two names share the same object; mutating through one is visible through the other."\n\n[[figure_attachments]]\nslug = "truth-and-size"\nanchor = "cell-0"\nfigure = "truth-and-size"\ncaption = "bool(x) calls __bool__ first; if absent, __len__() != 0; if neither, defaults to True."\n\n[[figure_attachments]]\nslug = "descriptors"\nanchor = "cell-0"\nfigure = "descriptor-protocol"\ncaption = "Attribute access on an instance routes through the descriptor\'s __get__/__set__/__delete__ when the attribute is a descriptor."\n\n[[figure_attachments]]\nslug = "bound-and-unbound-methods"\nanchor = "cell-0"\nfigure = "bound-unbound"\ncaption = "Accessing a method via an instance binds self; accessing it via the class returns the underlying function."\n\n[[figure_attachments]]\nslug = "classmethods-and-staticmethods"\nanchor = "cell-0"\nfigure = "method-kinds"\ncaption = "Three method kinds, three first-argument conventions: classmethod gets the class, staticmethod gets nothing, instance gets self."\n\n[[figure_attachments]]\nslug = "callable-objects"\nanchor = "cell-0"\nfigure = "callable-objects"\ncaption = "Defining __call__ makes any object callable; functions are just one shape that satisfies this protocol."\n\n[[figure_attachments]]\nslug = "attribute-access"\nanchor = "cell-0"\nfigure = "attribute-lookup"\ncaption = "obj.x checks instance __dict__, then class __dict__, then __getattr__; the first hit wins."\n\n[[figure_attachments]]\nslug = "guard-clauses"\nanchor = "cell-0"\nfigure = "guard-clauses"\ncaption = "Early returns handle the exceptional cases first so the main work is the body of the function, not its tail."\n\n[[figure_attachments]]\nslug = "bytes-and-bytearray"\nanchor = "cell-3"\nfigure = "bytes-vs-bytearray"\ncaption = "Both objects hold the same two bytes as integers; b\\"py\\" cannot change, while packet[0] = ord(\\"P\\") rewrites the first slot of the bytearray in place."\n\n[[figure_attachments]]\nslug = "sentinel-iteration"\nanchor = "cell-0"\nfigure = "sentinel-iteration"\ncaption = "iter(read_chunk, \\"\\") keeps calling read_chunk and yields \\"py\\" and \\"thon\\"; the empty string is the sentinel, so it stops the loop and is never yielded."\n\n[[figure_attachments]]\nslug = "partial-functions"\nanchor = "cell-0"\nfigure = "partial-functions"\ncaption = "`functools.partial(f, 1)` pre-fills `a=1`, returning a thinner callable `g(b, c)` that only needs the rest."\n\n[[figure_attachments]]\nslug = "args-and-kwargs"\nanchor = "cell-0"\nfigure = "args-kwargs"\ncaption = "*args captures the extra positionals as a tuple; **kwargs captures the extra keywords as a dict."\n\n[[figure_attachments]]\nslug = "multiple-return-values"\nanchor = "cell-0"\nfigure = "multiple-return"\ncaption = "A function returning multiple values really returns one tuple; the caller unpacks it into named bindings."\n\n[[figure_attachments]]\nslug = "lambdas"\nanchor = "cell-0"\nfigure = "lambda-expression"\ncaption = "A lambda is a function literal: parameters before the colon, a single expression after, no statement body."\n\n[[figure_attachments]]\nslug = "properties"\nanchor = "cell-0"\nfigure = "property-fork"\ncaption = "When x is a property, attribute access routes through fget/fset instead of touching __dict__."\n\n[[figure_attachments]]\nslug = "metaclasses"\nanchor = "cell-0"\nfigure = "metaclass-triangle"\ncaption = "A metaclass is the type of a class, just as a class is the type of its instances; type is the default metaclass."\n\n[[figure_attachments]]\nslug = "metaclasses"\nanchor = "cell-0"\nfigure = "class-triangle"\ncaption = "The class makes instances — the same triangle one level down, with type as the default apex."\n\n[[figure_attachments]]\nslug = "modules"\nanchor = "cell-0"\nfigure = "sys-path-resolution"\ncaption = "An import walks sys.path entry by entry; the first directory containing the module wins."\n\n[[figure_attachments]]\nslug = "import-aliases"\nanchor = "cell-0"\nfigure = "import-alias"\ncaption = "`import x as y` binds the name y to the same module object x would have."\n\n[[figure_attachments]]\nslug = "protocols"\nanchor = "cell-0"\nfigure = "protocol-check"\ncaption = "An object satisfies a protocol structurally — by having the required methods — not by inheriting it."\n\n[[figure_attachments]]\nslug = "enums"\nanchor = "cell-0"\nfigure = "enum-members"\ncaption = "An enum names a fixed set of symbolic values; no new members appear at runtime."\n\n[[figure_attachments]]\nslug = "datetime"\nanchor = "cell-0"\nfigure = "datetime-instant"\ncaption = "An aware datetime carries a UTC offset; one instant in time reads differently on two clocks."\n\n[[figure_attachments]]\nslug = "json"\nanchor = "cell-0"\nfigure = "json-python-mapping"\ncaption = "Six type pairs bridge the JSON text boundary; each json value maps to one Python type."\n\n[[figure_attachments]]\nslug = "regular-expressions"\nanchor = "cell-0"\nfigure = "regex-groups"\ncaption = "findall returns only what the parentheses capture: `([A-Za-z]+)` takes the name and `(\\\\d+)` the score, one (name, score) pair per record."\n\n[[figure_attachments]]\nslug = "number-parsing"\nanchor = "cell-0"\nfigure = "number-parse"\ncaption = "int() turns text into a typed number; malformed input raises ValueError instead of guessing."\n\n[[figure_attachments]]\nslug = "string-formatting"\nanchor = "cell-1"\nfigure = "format-spec"\ncaption = "The format spec is a railroad of optional stations in a fixed order; this cell\'s 05.1f visits zero-pad, width, precision and type and bypasses the rest."\n\n[[figure_attachments]]\nslug = "truthiness"\nanchor = "cell-0"\nfigure = "truthy-check"\ncaption = "bool(x) is True except for a small fixed set: 0, 0.0, \\"\\", [], {}, None, False."\n\n[[figure_attachments]]\nslug = "booleans"\nanchor = "cell-0"\nfigure = "boolean-truth-table"\ncaption = "`a and b` returns True only when both are True; otherwise it returns the first falsy value."\n\n[[figure_attachments]]\nslug = "sets"\nanchor = "cell-0"\nfigure = "set-buckets"\ncaption = "Sets are hash buckets without values; `x in s` averages O(1) regardless of size."\n\n[[figure_attachments]]\nslug = "tuples"\nanchor = "cell-3"\nfigure = "tuple-frozen"\ncaption = "Tuples are ordered, immutable sequences; positions matter, contents do not change once constructed."\n\n[[figure_attachments]]\nslug = "tuples"\nanchor = "cell-3"\nfigure = "list-append"\ncaption = "A list is the other intent: a variable number of similar items, growing in place with `.append`."\n\n[[figure_attachments]]\nslug = "yield-from"\nanchor = "cell-0"\nfigure = "yield-delegation"\ncaption = "`yield from inner` delegates iteration to an inner generator; its yields surface here unchanged."\n\n[[figure_attachments]]\nslug = "itertools"\nanchor = "cell-0"\nfigure = "itertools-chain"\ncaption = "chain stitches two iterables into one stream without materialising either: values arrive lazily."\n\n[[figure_attachments]]\nslug = "assertions"\nanchor = "cell-0"\nfigure = "assertion-check"\ncaption = "assert tests a condition; True passes silently, False raises AssertionError with the optional message."\n\n[[figure_attachments]]\nslug = "custom-exceptions"\nanchor = "cell-0"\nfigure = "custom-exception-chain"\ncaption = "Subclassing an existing exception gains a domain name without changing semantics."\n\n[[figure_attachments]]\nslug = "exception-groups"\nanchor = "cell-0"\nfigure = "exception-group-peel"\ncaption = "except* peels matched leaves out of an ExceptionGroup; survivors regroup and propagate."\n\n[[figure_attachments]]\nslug = "delete-statements"\nanchor = "cell-0"\nfigure = "delete-name-erased"\ncaption = "`del x` removes the name; the object survives if any other reference holds it, otherwise gets collected."\n\n[[figure_attachments]]\nslug = "conditionals"\nanchor = "cell-0"\nfigure = "branch-fork"\ncaption = "A predicate sorts a value into one of several branches; if/elif/else is the explicit spelling."\n\n[[figure_attachments]]\nslug = "match-statements"\nanchor = "cell-0"\nfigure = "match-dispatch-ladder"\ncaption = "match dispatches by pattern shape; the value flows down the patterns and the first match wins."\n\n[[figure_attachments]]\nslug = "assignment-expressions"\nanchor = "cell-0"\nfigure = "naming-decisions"\ncaption = "The walrus binds a name during the surrounding expression; one expression, two outputs."\n\n[[figure_attachments]]\nslug = "iterating-over-iterables"\nanchor = "cell-0"\nfigure = "iter-protocol"\ncaption = "`for` desugars to iter()+next(): one iter() call, then next() until StopIteration ends the loop."\n\n[[figure_attachments]]\nslug = "generator-expressions"\nanchor = "cell-1"\nfigure = "lazy-stream"\ncaption = "A generator expression composes filter and map lazily; values flow only when next() pulls them."\n\n[[figure_attachments]]\nslug = "async-iteration-and-context"\nanchor = "cell-0"\nfigure = "async-swimlane"\ncaption = "async iteration and async with both rest on the same loop-vs-coroutine handoff as await."\n\n[[figure_attachments]]\nslug = "loop-else"\nanchor = "cell-0"\nfigure = "loop-else-gate"\ncaption = "The loop\'s else branch runs only when the loop falls through naturally; break skips it."\n\n[[figure_attachments]]\nslug = "break-and-continue"\nanchor = "cell-0"\nfigure = "early-exit"\ncaption = "break exits the loop; continue skips to the next iteration. Both interrupt the natural fall-through."\n\n[[figure_attachments]]\nslug = "comprehension-patterns"\nanchor = "cell-0"\nfigure = "comprehension-equivalence"\ncaption = "Nested clauses compose left to right; the comprehension is still equivalent to a for-loop with append."\n\n[[figure_attachments]]\nslug = "container-protocols"\nanchor = "cell-0"\nfigure = "container-methods"\ncaption = "Container syntax routes to narrow protocol methods: assignment to __setitem__, membership to __contains__, lookup to __getitem__."\n\n[[figure_attachments]]\nslug = "functions"\nanchor = "cell-0"\nfigure = "function-with-body"\ncaption = "A function takes inputs, evaluates a body, and returns a value: `greet(\'Ada\')` produces `\'Hello, Ada\'`."\n\n[[figure_attachments]]\nslug = "constants"\nanchor = "cell-0"\nfigure = "constants-bind"\ncaption = "UPPER_CASE is a naming convention, not a language constraint; the binding behaves like any other variable."\n\n[[figure_attachments]]\nslug = "values"\nanchor = "cell-0"\nfigure = "value-type-lookup"\ncaption = "text names a str object, and type(text) is str: the type carries upper() and the rest of the behaviour, not the name."\n\n[[figure_attachments]]\nslug = "literals"\nanchor = "cell-0"\nfigure = "literal-forms"\ncaption = "Each Python type has its own literal spellings; ints accept decimal, hex, and binary; strings accept either quote."\n\n[[figure_attachments]]\nslug = "logging"\nanchor = "cell-0"\nfigure = "logging-threshold"\ncaption = "The handler\'s level is a gate: debug is below INFO and never reaches stdout, while info and warning pass through unchanged."\n\n[[figure_attachments]]\nslug = "collections-module"\nanchor = "cell-0"\nfigure = "collections-containers"\ncaption = "Four specialised containers for shapes the built-in types don\'t cover well: deque, Counter, defaultdict, namedtuple."\n\n[[figure_attachments]]\nslug = "while-loops"\nanchor = "cell-0"\nfigure = "while-backedge"\ncaption = "`while` repeats the body while the test stays true; the back-edge returns control to the test before each pass."\n\n[[figure_attachments]]\nslug = "while-loops"\nanchor = "cell-0"\nfigure = "loop-repetition"\ncaption = "Each loop shape has its own stopping rule: `for` ends when the iterable is exhausted, `while` when the condition turns false, sentinel iteration when the marker value appears."\n\n[[figure_attachments]]\nslug = "advanced-match-patterns"\nanchor = "cell-0"\nfigure = "match-pattern-variants"\ncaption = "Capture, alternative, guard, and class patterns each name a different way a value can match a case."\n\n[[figure_attachments]]\nslug = "packages"\nanchor = "cell-0"\nfigure = "package-tree"\ncaption = "A directory with __init__.py becomes an importable package; submodules and subpackages nest beneath it."\n\n[[figure_attachments]]\nslug = "virtual-environments"\nanchor = "cell-0"\nfigure = "venv-boundary"\ncaption = "A venv carries its own interpreter and site-packages, isolating a project\'s dependencies from the system."\n\n[[figure_attachments]]\nslug = "subprocesses"\nanchor = "cell-0"\nfigure = "subprocess-spawn"\ncaption = "subprocess.run spawns a child process and captures its stdout, stderr, and exit code as portable evidence."\n\n[[figure_attachments]]\nslug = "testing"\nanchor = "cell-0"\nfigure = "aaa-pattern"\ncaption = "arrange-act-assert: set up the state, perform the behavior under test, compare the result to expectations."\n\n[[figure_attachments]]\nslug = "networking"\nanchor = "cell-0"\nfigure = "socket-byte-boundary"\ncaption = "Text crosses the socket as bytes — `encode` marks the python → wire boundary, `decode` brings the bytes back to a Python `str`."\n\n[[figure_attachments]]\nslug = "threads-and-processes"\nanchor = "cell-0"\nfigure = "gil-lanes"\ncaption = "Threads share memory but the GIL serialises Python bytecode; processes run in parallel with isolated memory."\n\n[[figure_attachments]]\nslug = "casts-and-any"\nanchor = "cell-0"\nfigure = "cast-escape"\ncaption = "cast(T, x) tells the type checker to treat x as T; the runtime is unaffected."\n\n[[figure_attachments]]\nslug = "newtype"\nanchor = "cell-0"\nfigure = "newtype-phantom"\ncaption = "NewType creates a distinct static identity backed by the same runtime type — UserId is int with a name."\n\n[[figure_attachments]]\nslug = "overloads"\nanchor = "cell-0"\nfigure = "overload-signatures"\ncaption = "@overload declares static call signatures for double(int) and double(str); one runtime implementation handles both."\n\n[[figure_attachments]]\nslug = "paramspec"\nanchor = "cell-0"\nfigure = "paramspec-preserve"\ncaption = "ParamSpec preserves the wrapped function\'s signature through a decorator, parameter for parameter."\n\n[[figure_attachments]]\nslug = "literal-and-final"\nanchor = "cell-0"\nfigure = "literal-constrained"\ncaption = "Literal narrows a slot to a fixed set of constant values; Final says the binding will not change."\n\n[[figure_attachments]]\nslug = "callable-types"\nanchor = "cell-0"\nfigure = "callable-type"\ncaption = "A Callable annotation describes the callback slot: this argument list must produce this return type."\n\n[[figure_attachments]]\nslug = "runtime-type-checks"\nanchor = "cell-0"\nfigure = "isinstance-check"\ncaption = "isinstance and issubclass ask the runtime; the answer is a bool, not a static type refinement."\n\n[[figure_attachments]]\nslug = "structured-data-shapes"\nanchor = "cell-0"\nfigure = "structured-shapes"\ncaption = "The same record can be a mutable dataclass, an immutable NamedTuple, or a runtime dict described by TypedDict."\n\n[[figure_attachments]]\nslug = "csv-data"\nanchor = "cell-0"\nfigure = "csv-records"\ncaption = "CSV files are rows of records; each line has the same columns in the same order."\n\n[[figure_attachments]]\nslug = "warnings"\nanchor = "cell-0"\nfigure = "warning-signal"\ncaption = "A warning is a soft signal: the message is reported, but execution continues unless filters elevate it."\n\n[[figure_attachments]]\nslug = "object-lifecycle"\nanchor = "cell-0"\nfigure = "object-lifecycle"\ncaption = "Names keep the same object reachable; deleting one name matters only when it removes the last reference."\n\n# Journey-section figures keyed by the visible section title.\n[[journey_section_figures]]\nsection = "Start with executable evidence."\nfigure = "runtime-evidence-loop"\ncaption = "Examples are evidence loops: source, a run step, and visible output stay together."\n\n[[journey_section_figures]]\nsection = "Separate value, identity, and absence."\nfigure = "runtime-object-axes"\ncaption = "Runtime objects answer separate questions: equal value, same identity, or the singleton that marks absence."\n\n[[journey_section_figures]]\nsection = "Read expressions as object operations."\nfigure = "runtime-expression-model"\ncaption = "Expression syntax enters the data model; object methods produce the result."\n\n[[journey_section_figures]]\nsection = "Choose between paths."\nfigure = "control-decision-map"\ncaption = "Facts flow into one decision point; exactly one branch owns the next step."\n\n[[journey_section_figures]]\nsection = "Name and shape decisions."\nfigure = "control-fact-shape"\ncaption = "Name a fact when a condition needs it; match shape when the data structure is the decision."\n\n[[journey_section_figures]]\nsection = "Stop as soon as the answer is known."\nfigure = "control-stop-boundary"\ncaption = "Early exits draw a boundary: once the answer is found, the tail stays unread."\n\n[[journey_section_figures]]\nsection = "Choose the right loop shape."\nfigure = "iteration-loop-selector"\ncaption = "Choose the loop from its stopping rule: exhaustion, condition, or sentinel marker."\n\n[[journey_section_figures]]\nsection = "See the protocol behind `for`."\nfigure = "iteration-protocol-map"\ncaption = "for is surface syntax; iter() creates an iterator and next() pulls values until StopIteration."\n\n[[journey_section_figures]]\nsection = "Compose lazy value streams."\nfigure = "iteration-lazy-pull"\ncaption = "Lazy pipelines run from the consumer\'s pull: next() requests one value through each stage."\n\n[[journey_section_figures]]\nsection = "Pick the container that matches the question."\nfigure = "container-questions"\ncaption = "Each container answers a different question: ordered, fixed, lookup, unique."\n\n[[journey_section_figures]]\nsection = "Move between shapes deliberately."\nfigure = "reshape-pipeline"\ncaption = "Most everyday code reshapes data: one input, one transform, one new value."\n\n[[journey_section_figures]]\nsection = "Cross text and data boundaries."\nfigure = "text-data-boundary"\ncaption = "Programs receive text and produce structured data; parsing makes the boundary explicit."\n\n[[journey_section_figures]]\nsection = "Start with functions as named behavior."\nfigure = "function-signature"\ncaption = "A function is the first abstraction boundary: arguments in, body, return value out."\n\n[[journey_section_figures]]\nsection = "Use functions as values."\nfigure = "function-as-value"\ncaption = "Functions are first-class values. A second name binds to the same function object."\n\n[[journey_section_figures]]\nsection = "Bundle behavior with state."\nfigure = "class-with-state"\ncaption = "Classes group fields and methods so data and behavior move together behind one interface."\n\n[[journey_section_figures]]\nsection = "Keep runtime and static analysis separate."\nfigure = "type-runtime-static-split"\ncaption = "Runtime values run the program; static tools inspect separate annotations and report before execution."\n\n[[journey_section_figures]]\nsection = "Describe realistic data shapes."\nfigure = "type-shape-catalog"\ncaption = "Real data contracts combine fields, variants, and expected absence instead of one scalar type."\n\n[[journey_section_figures]]\nsection = "Scale annotations for reusable libraries."\nfigure = "type-library-contract"\ncaption = "Reusable APIs carry caller contracts through the library boundary with generics, parameters, and overloads."\n\n[[journey_section_figures]]\nsection = "Make failure explicit."\nfigure = "reliability-signal-map"\ncaption = "Different failure shapes need explicit signals: assertions, recovery, chained causes, or warnings."\n\n[[journey_section_figures]]\nsection = "Control resource and module boundaries."\nfigure = "reliability-boundary-map"\ncaption = "Reliable programs name their boundaries: resources clean up, modules import, environments constrain runtime."\n\n[[journey_section_figures]]\nsection = "Handle operations that outlive one expression."\nfigure = "reliability-operation-boundary"\ncaption = "Async, threaded, test, and logging work cross an operation boundary before evidence comes back."\n\n# Curated scores for example-cell figures.\n[[example_figure_scores]]\nslug = "variables"\nscore = 9.5\ncomment = "the canonical name → object picture"\n\n[[example_figure_scores]]\nslug = "mutability"\nscore = 9.5\ncomment = "three-state small multiple of aliased mutation"\n\n[[example_figure_scores]]\nslug = "copying-collections"\nscore = 9.5\ncomment = "same picture as mutability, perfect match"\n\n[[example_figure_scores]]\nslug = "hello-world"\nscore = 9.0\ncomment = "program → output, smallest mechanism"\n\n[[example_figure_scores]]\nslug = "numbers"\nscore = 9.0\ncomment = "int unbounded vs float thinning, both registers"\n\n[[example_figure_scores]]\nslug = "operators"\nscore = 9.0\ncomment = "expression tree mechanism"\n\n[[example_figure_scores]]\nslug = "none"\nscore = 9.0\ncomment = "three names converging on one None"\n\n[[example_figure_scores]]\nslug = "equality-and-identity"\nscore = 9.0\ncomment = "shared vs separate object, side-by-side"\n\n[[example_figure_scores]]\nslug = "strings"\nscore = 9.0\ncomment = "codepoints + bytes registers"\n\n[[example_figure_scores]]\nslug = "for-loops"\nscore = 9.0\ncomment = "4-row caret advance"\n\n[[example_figure_scores]]\nslug = "sorting"\nscore = 9.0\ncomment = "stability ribbons preserved across keys"\n\n[[example_figure_scores]]\nslug = "keyword-only-arguments"\nscore = 9.0\ncomment = "signature with explicit `*` separator"\n\n[[example_figure_scores]]\nslug = "positional-only-parameters"\nscore = 9.0\ncomment = "signature with explicit `/` separator"\n\n[[example_figure_scores]]\nslug = "closures"\nscore = 9.5\ncomment = "environment diagram: ghosted returned frame, heap function object, one live __closure__ reference; 1.5/1/0.75/1/1 · 1/1/1 · 1/0.5"\n\n[[example_figure_scores]]\nslug = "scope-global-nonlocal"\nscore = 9.0\ncomment = "LEGB nested rings"\n\n[[example_figure_scores]]\nslug = "recursion"\nscore = 9.0\ncomment = "the example\'s own tree at its deepest frame, return values unwinding; earns-place 0.75, the cell\'s output already gives 10; 1.5/0.75/1/1/1 · 1/1/1 · 1/0.5"\n\n[[example_figure_scores]]\nslug = "lists"\nscore = 9.0\ncomment = "cells with append mechanism"\n\n[[example_figure_scores]]\nslug = "dicts"\nscore = 9.0\ncomment = "the cell\'s own keys hashed to slots, the insert of \\"year\\" accented; earns-place 0.75, one-move 0.75 since insert and lookup share the caption; 1.5/0.75/0.75/1/1 · 1/1/1 · 1/0.5"\n\n[[example_figure_scores]]\nslug = "slices"\nscore = 9.0\ncomment = "ruler with bracket overlay"\n\n[[example_figure_scores]]\nslug = "comprehensions"\nscore = 9.0\ncomment = "comprehension over equivalent for-loop"\n\n[[example_figure_scores]]\nslug = "type-hints"\nscore = 9.0\ncomment = "ghost annotations over runtime values"\n\n[[example_figure_scores]]\nslug = "generators"\nscore = 9.5\ncomment = "the cell\'s two next() ribbons on countdown(3), local n shown surviving; earns-place 0.75, the prose says the same; 1.5/0.75/1/1/1 · 1/1/1 · 1/0.5"\n\n[[example_figure_scores]]\nslug = "exceptions"\nscore = 9.0\ncomment = "try/except/else/finally lanes with traced path"\n\n[[example_figure_scores]]\nslug = "context-managers"\nscore = 9.0\ncomment = "enter / body / exit bowtie"\n\n[[example_figure_scores]]\nslug = "async-await"\nscore = 9.0\ncomment = "loop/coro swimlane with await handoffs"\n\n[[example_figure_scores]]\nslug = "classes"\nscore = 9.0\ncomment = "instance/class/type triangle"\n\n[[example_figure_scores]]\nslug = "inheritance-and-super"\nscore = 9.0\ncomment = "MRO chain with diamond ghost"\n\n[[example_figure_scores]]\nslug = "dataclasses"\nscore = 9.0\ncomment = "fields → generated __init__ signature"\n\n[[example_figure_scores]]\nslug = "decorators"\nscore = 9.0\ncomment = "before/after rebinding through cell"\n\n[[example_figure_scores]]\nslug = "special-methods"\nscore = 9.0\ncomment = "syntax → method dispatch"\n\n[[example_figure_scores]]\nslug = "unpacking"\nscore = 9.0\ncomment = "binding-line mechanism with *rest"\n\n[[example_figure_scores]]\nslug = "exception-chaining"\nscore = 9.0\ncomment = "__cause__ vs __context__ distinguished"\n\n[[example_figure_scores]]\nslug = "iterating-over-iterables"\nscore = 9.0\ncomment = "iter() exposes the iterator"\n\n[[example_figure_scores]]\nslug = "iterators"\nscore = 9.0\ncomment = "three-state machine"\n\n[[example_figure_scores]]\nslug = "iterator-vs-iterable"\nscore = 9.0\ncomment = "the protocol exposed"\n\n[[example_figure_scores]]\nslug = "container-protocols"\nscore = 9.0\ncomment = "syntax routes to __setitem__, __contains__, __getitem__"\n\n[[example_figure_scores]]\nslug = "operator-overloading"\nscore = 9.0\ncomment = "dispatch arrow"\n\n[[example_figure_scores]]\nslug = "union-and-optional-types"\nscore = 9.0\ncomment = "type fork to several shapes"\n\n[[example_figure_scores]]\nslug = "abstract-base-classes"\nscore = 9.0\ncomment = "same triangle as concrete classes"\n\n[[example_figure_scores]]\nslug = "conditionals"\nscore = 9.0\ncomment = "predicate forks value to branch"\n\n[[example_figure_scores]]\nslug = "match-statements"\nscore = 9.0\ncomment = "dispatch ladder; first match wins"\n\n[[example_figure_scores]]\nslug = "advanced-match-patterns"\nscore = 9.0\ncomment = "four pattern variants"\n\n[[example_figure_scores]]\nslug = "loop-else"\nscore = 9.0\ncomment = "fell-through vs broke, two outcomes"\n\n[[example_figure_scores]]\nslug = "while-loops"\nscore = 9.0\ncomment = "back-edge mechanism plus the three stopping rules"\n\n[[example_figure_scores]]\nslug = "type-aliases"\nscore = 9.0\ncomment = "complex annotation collapses to a name"\n\n[[example_figure_scores]]\nslug = "typed-dicts"\nscore = 9.0\ncomment = "keys with declared value types"\n\n[[example_figure_scores]]\nslug = "comprehension-patterns"\nscore = 9.0\ncomment = "nested clauses compose"\n\n[[example_figure_scores]]\nslug = "lambdas"\nscore = 9.0\ncomment = "function literal: params / expression"\n\n[[example_figure_scores]]\nslug = "string-formatting"\nscore = 9.0\ncomment = "railroad tracing the cell\'s 05.1f; one-move 0.75, restraint 0.75 and fit 0.75: still the densest figure in the set at the banner ceiling; 1.5/1/0.75/1/1 · 1/1/0.75 · 0.75/0.5"\n\n[[example_figure_scores]]\nslug = "regular-expressions"\nscore = 9.0\ncomment = "the cell\'s pattern with both capture groups dropped onto Ada: 10; one-move 0.75 and restraint 0.75 for two rows plus two drops; 1.5/1/0.75/1/1 · 1/1/0.75 · 1/0.5"\n\n[[example_figure_scores]]\nslug = "json"\nscore = 9.0\ncomment = "two-column type mapping"\n\n[[example_figure_scores]]\nslug = "metaclasses"\nscore = 9.0\ncomment = "extended triangle to metaclass"\n\n[[example_figure_scores]]\nslug = "datetime"\nscore = 9.0\ncomment = "one instant, two clock offsets"\n\n[[example_figure_scores]]\nslug = "booleans"\nscore = 9.0\ncomment = "2×2 truth table"\n\n[[example_figure_scores]]\nslug = "sets"\nscore = 9.0\ncomment = "hash buckets without values"\n\n[[example_figure_scores]]\nslug = "yield-from"\nscore = 9.0\ncomment = "stitched ribbons; delegation"\n\n[[example_figure_scores]]\nslug = "generator-expressions"\nscore = 9.0\ncomment = "lazy filter→map pipeline"\n\n[[example_figure_scores]]\nslug = "async-iteration-and-context"\nscore = 9.0\ncomment = "loop/coro lanes with await yields"\n\n[[example_figure_scores]]\nslug = "assignment-expressions"\nscore = 9.0\ncomment = "walrus binds while comparing"\n\n[[example_figure_scores]]\nslug = "break-and-continue"\nscore = 9.0\ncomment = "early exit at first match"\n\n[[example_figure_scores]]\nslug = "delete-statements"\nscore = 9.0\ncomment = "name erased; object survives if referenced"\n\n[[example_figure_scores]]\nslug = "exception-groups"\nscore = 9.0\ncomment = "except* peels matching leaves"\n\n[[example_figure_scores]]\nslug = "custom-exceptions"\nscore = 9.0\ncomment = "subclass chain to a domain name"\n\n[[example_figure_scores]]\nslug = "modules"\nscore = 9.0\ncomment = "sys.path resolution; first hit wins"\n\n[[example_figure_scores]]\nslug = "protocols"\nscore = 9.0\ncomment = "structural duck check"\n\n[[example_figure_scores]]\nslug = "enums"\nscore = 9.0\ncomment = "closed set of symbolic values"\n\n[[example_figure_scores]]\nslug = "functions"\nscore = 9.0\ncomment = "specific call: greet(\'Ada\') → \'Hello, Ada\'"\n\n[[example_figure_scores]]\nslug = "constants"\nscore = 9.0\ncomment = "name binding with the cell\'s own MAX_RETRIES → 3; earns-place 0.5, the prose already says it is an ordinary binding; 1.5/0.5/1/1/1 · 1/1/1 · 1/0.5"\n\n[[example_figure_scores]]\nslug = "values"\nscore = 9.0\ncomment = "text → str binding plus the type() hop to where upper() lives; earns-place 0.75 since the cell prints type(text), one-move 0.75; 1.5/0.75/0.75/1/1 · 1/1/1 · 1/0.5"\n\n[[example_figure_scores]]\nslug = "literals"\nscore = 8.5\ncomment = "literal spellings per type; a reference table, kept until a mechanism figure replaces it"\n\n[[example_figure_scores]]\nslug = "logging"\nscore = 9.5\ncomment = "the cell\'s three records crossing the handler\'s INFO gate, debug dropped; earns-place 0.75 since the output already shows the drop; 1.5/0.75/1/1/1 · 1/1/1 · 1/0.5"\n\n[[example_figure_scores]]\nslug = "collections-module"\nscore = 8.5\ncomment = "deque / Counter / defaultdict / namedtuple; a catalogue, kept until the page is split"\n\n[[example_figure_scores]]\nslug = "import-aliases"\nscore = 9.0\ncomment = "two names bind to the same module"\n\n[[example_figure_scores]]\nslug = "number-parsing"\nscore = 9.0\ncomment = "int() success path vs ValueError"\n\n[[example_figure_scores]]\nslug = "tuples"\nscore = 9.0\ncomment = "frozen sequence with struck-through .append"\n\n[[example_figure_scores]]\nslug = "truthiness"\nscore = 9.0\ncomment = "bool(x) with the falsy set as a strip"\n\n[[example_figure_scores]]\nslug = "itertools"\nscore = 9.0\ncomment = "chain joins two iterables into one stream"\n\n[[example_figure_scores]]\nslug = "assertions"\nscore = 9.0\ncomment = "True passes, False raises"\n\n[[example_figure_scores]]\nslug = "descriptors"\nscore = 9.0\ncomment = "get/set/delete protocol routed through descriptor"\n\n[[example_figure_scores]]\nslug = "attribute-access"\nscore = 9.0\ncomment = "instance __dict__ → class __dict__ → __getattr__"\n\n[[example_figure_scores]]\nslug = "bound-and-unbound-methods"\nscore = 9.0\ncomment = "instance.method bound vs Class.method unbound"\n\n[[example_figure_scores]]\nslug = "classmethods-and-staticmethods"\nscore = 9.0\ncomment = "three method kinds, three first-arg conventions"\n\n[[example_figure_scores]]\nslug = "callable-objects"\nscore = 9.0\ncomment = "__call__ makes any object callable"\n\n[[example_figure_scores]]\nslug = "generics-and-typevar"\nscore = 9.0\ncomment = "the same T flows in and out"\n\n[[example_figure_scores]]\nslug = "truth-and-size"\nscore = 9.0\ncomment = "__bool__ → __len__ → True fallback chain"\n\n[[example_figure_scores]]\nslug = "bytes-and-bytearray"\nscore = 9.5\ncomment = "the example\'s two bytes as integer slots, packet[0] rewritten in place, anchored to the mutating cell; 1.5/0.75/1/1/1 · 1/1/1 · 1/0.5"\n\n[[example_figure_scores]]\nslug = "sentinel-iteration"\nscore = 9.0\ncomment = "the cell\'s read_chunk and chunks; the empty string ghosted as the sentinel; earns-place 0.75, the output already omits it; 1.5/0.75/1/1/1 · 1/1/1 · 1/0.5"\n\n[[example_figure_scores]]\nslug = "partial-functions"\nscore = 9.0\ncomment = "f → partial(f, 1) → g"\n\n[[example_figure_scores]]\nslug = "guard-clauses"\nscore = 9.0\ncomment = "early returns, main body at the tail"\n\n[[example_figure_scores]]\nslug = "packages"\nscore = 9.0\ncomment = "__init__.py + nested submodules"\n\n[[example_figure_scores]]\nslug = "virtual-environments"\nscore = 9.0\ncomment = "project / venv boundary"\n\n[[example_figure_scores]]\nslug = "subprocesses"\nscore = 9.0\ncomment = "spawn → child → captured output"\n\n[[example_figure_scores]]\nslug = "testing"\nscore = 9.0\ncomment = "arrange-act-assert three-row pattern"\n\n[[example_figure_scores]]\nslug = "networking"\nscore = 9.0\ncomment = "text ↔ bytes across the socket boundary"\n\n[[example_figure_scores]]\nslug = "casts-and-any"\nscore = 9.0\ncomment = "Any → cast(T, x) → T, runtime unchanged"\n\n[[example_figure_scores]]\nslug = "newtype"\nscore = 9.0\ncomment = "same runtime, distinct static identity"\n\n[[example_figure_scores]]\nslug = "paramspec"\nscore = 9.0\ncomment = "P preserved through decorator"\n\n[[example_figure_scores]]\nslug = "literal-and-final"\nscore = 9.0\ncomment = "slot narrows to a fixed set"\n\n[[example_figure_scores]]\nslug = "runtime-type-checks"\nscore = 9.0\ncomment = "isinstance returns bool"\n\n[[example_figure_scores]]\nslug = "structured-data-shapes"\nscore = 9.0\ncomment = "dataclass vs NamedTuple vs TypedDict runtime trade-offs"\n\n[[example_figure_scores]]\nslug = "csv-data"\nscore = 9.0\ncomment = "rows × columns; same shape per line"\n\n[[example_figure_scores]]\nslug = "warnings"\nscore = 9.0\ncomment = "soft signal; execution continues"\n\n[[example_figure_scores]]\nslug = "object-lifecycle"\nscore = 9.0\ncomment = "names keep object reachable until last reference disappears"\n\n[[example_figure_scores]]\nslug = "args-and-kwargs"\nscore = 9.0\ncomment = "*args tuple, **kwargs dict regions"\n\n[[example_figure_scores]]\nslug = "multiple-return-values"\nscore = 9.0\ncomment = "function returns tuple; caller unpacks"\n\n[[example_figure_scores]]\nslug = "properties"\nscore = 9.0\ncomment = "obj.x routes through fget instead of __dict__"\n\n[[example_figure_scores]]\nslug = "overloads"\nscore = 9.0\ncomment = "static overload signatures contrasted with one runtime body"\n\n[[example_figure_scores]]\nslug = "callable-types"\nscore = 9.0\ncomment = "callback slot shows argument list and return type"\n\n[[example_figure_scores]]\nslug = "threads-and-processes"\nscore = 9.0\ncomment = "thread GIL sharing contrasted with process isolation"\n\n# Curated scores for journey-section figures.\n[[journey_section_figure_scores]]\nsection = "Start with executable evidence."\nscore = 9.0\ncomment = "journey-native source/run/output evidence loop"\n\n[[journey_section_figure_scores]]\nsection = "Separate value, identity, and absence."\nscore = 9.0\ncomment = "three runtime questions separated"\n\n[[journey_section_figure_scores]]\nsection = "Read expressions as object operations."\nscore = 9.0\ncomment = "syntax enters the data-model method surface"\n\n[[journey_section_figure_scores]]\nsection = "Choose between paths."\nscore = 9.0\ncomment = "branch map independent of one if-statement example"\n\n[[journey_section_figure_scores]]\nsection = "Name and shape decisions."\nscore = 9.0\ncomment = "name-vs-shape decision map"\n\n[[journey_section_figure_scores]]\nsection = "Stop as soon as the answer is known."\nscore = 9.0\ncomment = "early boundary leaves tail unread"\n\n[[journey_section_figure_scores]]\nsection = "Choose the right loop shape."\nscore = 9.0\ncomment = "loop choice by stopping rule"\n\n[[journey_section_figure_scores]]\nsection = "See the protocol behind `for`."\nscore = 9.5\ncomment = "for surface mapped to iter()/next()/StopIteration"\n\n[[journey_section_figure_scores]]\nsection = "Compose lazy value streams."\nscore = 9.0\ncomment = "consumer pull drives the lazy pipeline"\n\n[[journey_section_figure_scores]]\nsection = "Pick the container that matches the question."\nscore = 9.0\ncomment = "list/tuple/dict/set per question"\n\n[[journey_section_figure_scores]]\nsection = "Move between shapes deliberately."\nscore = 9.0\ncomment = "input → transform → result"\n\n[[journey_section_figure_scores]]\nsection = "Cross text and data boundaries."\nscore = 9.0\ncomment = "text in, structured value out"\n\n[[journey_section_figure_scores]]\nsection = "Start with functions as named behavior."\nscore = 9.0\ncomment = "concrete call, named body, and return boundary"\n\n[[journey_section_figure_scores]]\nsection = "Use functions as values."\nscore = 9.0\ncomment = "second name binds same function"\n\n[[journey_section_figure_scores]]\nsection = "Bundle behavior with state."\nscore = 9.0\ncomment = "class groups state + methods"\n\n[[journey_section_figure_scores]]\nsection = "Keep runtime and static analysis separate."\nscore = 9.0\ncomment = "runtime track separated from static-tool track"\n\n[[journey_section_figure_scores]]\nsection = "Describe realistic data shapes."\nscore = 9.0\ncomment = "field, variant, and absence contracts in one map"\n\n[[journey_section_figure_scores]]\nsection = "Scale annotations for reusable libraries."\nscore = 9.0\ncomment = "caller contracts survive library API boundary"\n\n[[journey_section_figure_scores]]\nsection = "Make failure explicit."\nscore = 9.0\ncomment = "failure shapes mapped to explicit signals"\n\n[[journey_section_figure_scores]]\nsection = "Control resource and module boundaries."\nscore = 9.0\ncomment = "resource/module/env boundaries shown together"\n\n[[journey_section_figure_scores]]\nsection = "Handle operations that outlive one expression."\nscore = 9.0\ncomment = "operation boundary returns evidence later"\n\n# Curated example quality scores.\n[[example_quality_scores]]\nslug = "hello-world"\nscore = 7.1\ncomment = "waived: traditional smallest complete program"\n\n[[example_quality_scores]]\nslug = "values"\nscore = 9.0\ncomment = "object/type/operation map with prerequisite graph edges"\n\n[[example_quality_scores]]\nslug = "literals"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich, note-heavy, multi-cell"\n\n[[example_quality_scores]]\nslug = "numbers"\nscore = 9.0\ncomment = "graph-rich, note-heavy"\n\n[[example_quality_scores]]\nslug = "booleans"\nscore = 9.0\ncomment = "truth operations, short-circuiting, bool-as-int footgun"\n\n[[example_quality_scores]]\nslug = "operators"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich, note-heavy, multi-cell"\n\n[[example_quality_scores]]\nslug = "none"\nscore = 9.0\ncomment = "None, mapping default, and exception absence boundaries"\n\n[[example_quality_scores]]\nslug = "variables"\nscore = 9.0\ncomment = "binding, rebinding, augmented-assignment, lifecycle graph"\n\n[[example_quality_scores]]\nslug = "constants"\nscore = 9.0\ncomment = "constant convention, Final boundary, runtime rebinding evidence"\n\n[[example_quality_scores]]\nslug = "truthiness"\nscore = 9.0\ncomment = "truth-value categories, explicit-comparison boundary, graph-linked"\n\n[[example_quality_scores]]\nslug = "equality-and-identity"\nscore = 9.0\ncomment = "== versus is, singleton check, identity-cache warning"\n\n[[example_quality_scores]]\nslug = "mutability"\nscore = 9.0\ncomment = "in-place mutation, rebinding, alias visibility"\n\n[[example_quality_scores]]\nslug = "object-lifecycle"\nscore = 9.0\ncomment = "references, rebinding, and last-reference boundary"\n\n[[example_quality_scores]]\nslug = "strings"\nscore = 9.0\ncomment = "Unicode text, immutability, encoding boundary"\n\n[[example_quality_scores]]\nslug = "bytes-and-bytearray"\nscore = 9.0\ncomment = "graph-rich, note-heavy"\n\n[[example_quality_scores]]\nslug = "string-formatting"\nscore = 9.0\ncomment = "f-string expression, format spec, debug/repr boundary"\n\n[[example_quality_scores]]\nslug = "conditionals"\nscore = 9.0\ncomment = "branch ordering, truthiness, and ternary boundary"\n\n[[example_quality_scores]]\nslug = "guard-clauses"\nscore = 9.0\ncomment = "nested contrast plus flattened guard path"\n\n[[example_quality_scores]]\nslug = "assignment-expressions"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "for-loops"\nscore = 9.0\ncomment = "direct iteration, range, and enumerate progression"\n\n[[example_quality_scores]]\nslug = "break-and-continue"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "loop-else"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "iterating-over-iterables"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "iterators"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "iterator-vs-iterable"\nscore = 9.0\ncomment = "graph-rich"\n\n[[example_quality_scores]]\nslug = "sentinel-iteration"\nscore = 9.0\ncomment = "call-until-marker shape contrasted with manual while"\n\n[[example_quality_scores]]\nslug = "match-statements"\nscore = 9.0\ncomment = "shape dispatch and guarded pattern payoff"\n\n[[example_quality_scores]]\nslug = "advanced-match-patterns"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "while-loops"\nscore = 9.0\ncomment = "state-driven repetition contrasted with for loops"\n\n[[example_quality_scores]]\nslug = "lists"\nscore = 9.0\ncomment = "ordered mutable sequence operations plus tuple/set/copy boundaries"\n\n[[example_quality_scores]]\nslug = "tuples"\nscore = 9.0\ncomment = "graph-rich, note-heavy"\n\n[[example_quality_scores]]\nslug = "unpacking"\nscore = 9.0\ncomment = "sequence, starred, and mapping unpacking shapes"\n\n[[example_quality_scores]]\nslug = "dicts"\nscore = 9.0\ncomment = "lookup/default/update/delete dictionary boundaries"\n\n[[example_quality_scores]]\nslug = "sets"\nscore = 9.0\ncomment = "uniqueness, membership, set algebra, ordering boundary"\n\n[[example_quality_scores]]\nslug = "slices"\nscore = 9.0\ncomment = "range bounds, step, reverse, and unchanged-source evidence"\n\n[[example_quality_scores]]\nslug = "comprehensions"\nscore = 9.0\ncomment = "loop-equivalent collection building with filter/projection boundaries"\n\n[[example_quality_scores]]\nslug = "comprehension-patterns"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "sorting"\nscore = 9.0\ncomment = "key functions, reverse order, sorted/list.sort boundary"\n\n[[example_quality_scores]]\nslug = "collections-module"\nscore = 9.0\ncomment = "Counter, defaultdict, deque, namedtuple mapped to data shapes"\n\n[[example_quality_scores]]\nslug = "copying-collections"\nscore = 9.0\ncomment = "alias, shallow copy, and deepcopy boundaries"\n\n[[example_quality_scores]]\nslug = "functions"\nscore = 9.0\ncomment = "definition/call/return/default-boundary walkthrough"\n\n[[example_quality_scores]]\nslug = "keyword-only-arguments"\nscore = 9.0\ncomment = "call-site readability and boolean flag boundary"\n\n[[example_quality_scores]]\nslug = "positional-only-parameters"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "args-and-kwargs"\nscore = 9.0\ncomment = "flexible argument collection plus forwarding/API-boundary graph"\n\n[[example_quality_scores]]\nslug = "multiple-return-values"\nscore = 9.0\ncomment = "tuple return plus unpacking boundary"\n\n[[example_quality_scores]]\nslug = "closures"\nscore = 9.0\ncomment = "closed-over state, factory payoff, late-binding boundary"\n\n[[example_quality_scores]]\nslug = "partial-functions"\nscore = 9.0\ncomment = "before/after callable adaptation and introspection"\n\n[[example_quality_scores]]\nslug = "scope-global-nonlocal"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "recursion"\nscore = 9.0\ncomment = "base case and recursive tree-shape payoff"\n\n[[example_quality_scores]]\nslug = "lambdas"\nscore = 9.0\ncomment = "expression callable use contrasted with named def reuse"\n\n[[example_quality_scores]]\nslug = "generators"\nscore = 9.0\ncomment = "graph-rich, note-heavy"\n\n[[example_quality_scores]]\nslug = "yield-from"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "generator-expressions"\nscore = 9.0\ncomment = "eager list contrast, lazy one-pass consumption, reducer use"\n\n[[example_quality_scores]]\nslug = "itertools"\nscore = 9.0\ncomment = "lazy standard-library pipeline and iterator-composition payoff"\n\n[[example_quality_scores]]\nslug = "decorators"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "classes"\nscore = 9.0\ncomment = "graph-rich, note-heavy"\n\n[[example_quality_scores]]\nslug = "inheritance-and-super"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "classmethods-and-staticmethods"\nscore = 9.0\ncomment = "graph-rich, note-heavy"\n\n[[example_quality_scores]]\nslug = "dataclasses"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "properties"\nscore = 9.0\ncomment = "managed attribute API without caller syntax change"\n\n[[example_quality_scores]]\nslug = "special-methods"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich, note-heavy, multi-cell"\n\n[[example_quality_scores]]\nslug = "truth-and-size"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "container-protocols"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "callable-objects"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "operator-overloading"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "attribute-access"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "bound-and-unbound-methods"\nscore = 9.0\ncomment = "graph-rich, note-heavy"\n\n[[example_quality_scores]]\nslug = "descriptors"\nscore = 9.0\ncomment = "descriptor lookup, __set_name__, and validation mechanics"\n\n[[example_quality_scores]]\nslug = "metaclasses"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "context-managers"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich, note-heavy"\n\n[[example_quality_scores]]\nslug = "delete-statements"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "exceptions"\nscore = 9.0\ncomment = "specific handling, else/finally cleanup, broad-catch boundary"\n\n[[example_quality_scores]]\nslug = "assertions"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "exception-chaining"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "exception-groups"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "warnings"\nscore = 9.0\ncomment = "capture and escalate soft failures with filters"\n\n[[example_quality_scores]]\nslug = "modules"\nscore = 9.0\ncomment = "graph-rich, note-heavy"\n\n[[example_quality_scores]]\nslug = "import-aliases"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich, note-heavy"\n\n[[example_quality_scores]]\nslug = "packages"\nscore = 9.0\ncomment = "graph-rich, note-heavy"\n\n[[example_quality_scores]]\nslug = "virtual-environments"\nscore = 9.0\ncomment = "standard venv workflow plus explicit Worker deployment boundary"\n\n[[example_quality_scores]]\nslug = "type-hints"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich, note-heavy, multi-cell"\n\n[[example_quality_scores]]\nslug = "runtime-type-checks"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "union-and-optional-types"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "type-aliases"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "typed-dicts"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "structured-data-shapes"\nscore = 9.0\ncomment = "graph-rich, note-heavy"\n\n[[example_quality_scores]]\nslug = "literal-and-final"\nscore = 9.0\ncomment = "Literal value set, Final rebinding promise, runtime caveat"\n\n[[example_quality_scores]]\nslug = "callable-types"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "generics-and-typevar"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "paramspec"\nscore = 9.0\ncomment = "Callable erasure contrasted with ParamSpec-preserving decorator"\n\n[[example_quality_scores]]\nslug = "overloads"\nscore = 9.0\ncomment = "static overload stubs contrasted with one runtime implementation"\n\n[[example_quality_scores]]\nslug = "casts-and-any"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "newtype"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "protocols"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "abstract-base-classes"\nscore = 9.0\ncomment = "graph-rich, note-heavy"\n\n[[example_quality_scores]]\nslug = "enums"\nscore = 9.0\ncomment = "closed symbolic choice set contrasted with raw strings"\n\n[[example_quality_scores]]\nslug = "regular-expressions"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich, note-heavy, multi-cell"\n\n[[example_quality_scores]]\nslug = "number-parsing"\nscore = 9.0\ncomment = "decimal, explicit base, and recoverable ValueError boundary"\n\n[[example_quality_scores]]\nslug = "custom-exceptions"\nscore = 9.0\ncomment = "domain error naming, raise point, recovery boundary"\n\n[[example_quality_scores]]\nslug = "json"\nscore = 9.0\ncomment = "graph-rich, note-heavy"\n\n[[example_quality_scores]]\nslug = "logging"\nscore = 9.0\ncomment = "logger, handler, formatter, and threshold boundaries"\n\n[[example_quality_scores]]\nslug = "testing"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n\n[[example_quality_scores]]\nslug = "subprocesses"\nscore = 9.0\ncomment = "standard subprocess contract plus explicit Worker boundary"\n\n[[example_quality_scores]]\nslug = "threads-and-processes"\nscore = 9.0\ncomment = "thread/process executor contrast plus explicit Worker boundary"\n\n[[example_quality_scores]]\nslug = "networking"\nscore = 9.0\ncomment = "protocol byte boundary plus explicit socket runtime caveat"\n\n[[example_quality_scores]]\nslug = "datetime"\nscore = 9.0\ncomment = "date/time/delta parsing with timezone scope made explicit"\n\n[[example_quality_scores]]\nslug = "csv-data"\nscore = 9.0\ncomment = "DictReader, conversion, and DictWriter row boundary"\n\n[[example_quality_scores]]\nslug = "async-await"\nscore = 9.0\ncomment = "graph-rich, note-heavy"\n\n[[example_quality_scores]]\nslug = "async-iteration-and-context"\nscore = 9.0\ncomment = "criterion-level pass: graph-rich"\n'
diff --git a/src/marginalia.py b/src/marginalia.py
index faa6edd..1dcbe68 100644
--- a/src/marginalia.py
+++ b/src/marginalia.py
@@ -102,17 +102,22 @@ def scope_rings(c: Canvas) -> None:
 
 
 def closure_cell(c: Canvas) -> None:
-    """Inner function references a cell created by the outer call.
-
-    Outer scope holds the `cell` (the captured `factor`); the inner function
-    keeps a reference into it, so the call survives the outer return.
+    """Closures · the call that made `double` has returned; its cell survives.
+
+    The environment picture (Composing Programs / Python Tutor): frames
+    on the left, objects on the right. make_multiplier(2) ran, bound
+    factor → 2, and returned, so its frame is ghosted. double now names
+    a function object on the heap whose __closure__ still points into
+    that frame, which is why the captured factor outlives the call. The
+    one accent is that surviving reference.
     """
-    c.frame(0, 16, 240, 96, label="make_multiplier")
-    c.tag(16, 32, "cell")
-    c.cell(16, 38, "factor=2", w=84, h=22)
-    c.frame(112, 38, 122, 60, label="multiply")
-    c.label(173, 76, "uses cell", anchor="middle")
-    c.closed_arrow(128, 76, 102, 56, emphasis=True)
+    c.env(0, 14, "make_multiplier(2) · returned", [("factor", "2")], ghost=True)
+    c.name_box(0, 80, "double")
+    c.closed_arrow(62, 92, 148, 92, emphasis=False)
+    c.frame(150, 62, 130, 48, label="function · multiply")
+    c.mono(215, 84, "value * factor")
+    c.label(114, 60, "__closure__", anchor="end")
+    c.closed_arrow(150, 74, 112, 32, emphasis=True)
 
 
 def slice_ruler(c: Canvas) -> None:
@@ -365,9 +370,9 @@ def type_shape_catalog(c: Canvas) -> None:
     c.cell(0, 44, "data", w=62, h=24, soft=True)
     rows = [(8, "fields", "TypedDict"), (42, "variant", "Union"), (76, "absence", "Optional")]
     for y, question, shape in rows:
-        c.closed_arrow(62, 56, 108, y + 11, emphasis=(shape == "Union"))
+        c.closed_arrow(62, 56, 108, y + 11, emphasis=False)
         c.cell(110, y, question, w=78, h=22)
-        c.cell(198, y, shape, w=90, h=22, soft=(shape == "Union"))
+        c.cell(198, y, shape, w=90, h=22)
 
 
 def type_library_contract(c: Canvas) -> None:
@@ -423,9 +428,9 @@ def reliability_signal_map(c: Canvas) -> None:
     c.cell(0, 52, "problem", w=70, h=24)
     rows = [(4, "assume", "assert"), (36, "recover", "except"), (68, "cause", "chain"), (100, "soft", "warn")]
     for y, kind, signal in rows:
-        c.closed_arrow(70, 64, 112, y + 11, emphasis=(signal == "except"))
+        c.closed_arrow(70, 64, 112, y + 11, emphasis=False)
         c.cell(114, y, kind, w=70, h=22)
-        c.cell(194, y, signal, w=72, h=22, soft=(signal == "except"))
+        c.cell(194, y, signal, w=72, h=22)
 
 
 def reliability_boundary_map(c: Canvas) -> None:
@@ -468,9 +473,9 @@ def naming_decisions(c: Canvas) -> None:
     c.tag(0, 56, "dispatch shape")
     c.cell(0, 68, "value", w=70, h=22)
     for i, label in enumerate(["case int", "case [x,y]", "case _"]):
-        x = 96 + i * 70
-        c.closed_arrow(70 if i == 0 else x - 12, 79, x, 79, emphasis=(i == 1))
-        c.cell(x, 68, label, w=62, h=22, soft=(i == 1))
+        x = 96 + i * 84
+        c.closed_arrow(70 if i == 0 else x - 22, 79, x, 79, emphasis=False)
+        c.cell(x, 68, label, w=62, h=22)
 
 
 def early_exit(c: Canvas) -> None:
@@ -523,10 +528,10 @@ def control_stop_boundary(c: Canvas) -> None:
 def iteration_loop_selector(c: Canvas) -> None:
     """Iteration journey · choose the loop shape from the stopping rule."""
     c.cell(0, 40, "stop rule", w=86, h=24)
-    choices = [(6, "for", "exhausted", False), (40, "while", "condition", False), (74, "sentinel", "marker", True)]
-    for y, loop, rule, chosen in choices:
-        c.closed_arrow(86, 52, 128, y + 11, emphasis=chosen)
-        c.cell(130, y, loop, w=78, h=22, soft=chosen)
+    choices = [(6, "for", "exhausted"), (40, "while", "condition"), (74, "sentinel", "marker")]
+    for y, loop, rule in choices:
+        c.closed_arrow(86, 52, 128, y + 11, emphasis=False)
+        c.cell(130, y, loop, w=78, h=22)
         c.label(218, y + 15, rule)
 
 
@@ -563,25 +568,51 @@ def iteration_lazy_pull(c: Canvas) -> None:
 # ─── Example figures (promoted from the gestalt) ──────────────────────
 
 
-def variables_bind(c: Canvas) -> None:
-    """Variables · names bind to objects: the canonical Python picture."""
-    c.bind(0, 6, "x", "int", "42", object_w=70, gap=20)
+def _bind_figure(name: str, type_tag: str, value: str, *, name_w: int = 60, object_w: int = 70):
+    """Factory for the canonical name → object picture.
+
+    One paint function per lesson, parametrised with that lesson's own
+    running name and value, so the mechanism is shared while the figure
+    matches the cell it sits under (rubric v1 wanted the match, v2 gave
+    it up to allow reuse; the factory gives both).
+    """
+
+    def paint(c: Canvas) -> None:
+        c.bind(0, 6, name, type_tag, value, object_w=object_w, gap=28, name_w=name_w)
+
+    paint.__name__ = f"bind_{name.lower()}"
+    paint.__doc__ = f"Binding · {name} → {type_tag} {value}: the canonical name → object picture."
+    return paint
+
+
+variables_bind = _bind_figure("message", "str", '"hi"')
+constants_bind = _bind_figure("MAX_RETRIES", "int", "3", name_w=84)
 
 
 def call_stack(c: Canvas) -> None:
-    """Recursion · stacked frames of the same function with different arguments."""
-    chain = [3, 2, 1, 0]
-    for i, n in enumerate(chain):
-        suffix = " ← base" if n == 0 else ""
-        c.cell(0, i * 22, f"factorial({n}){suffix}", w=180, h=20)
-    c.dashed(192, 90, 192, 18)
-    c.closed_arrow(192, 30, 192, 18, emphasis=True)
+    """Recursion · the frames alive at the deepest point of total(tree), and what each returns.
+
+    The example's tree is 1 → (2, 3 → 4). When total reaches the leaf
+    with value 4, three frames of the same function are stacked, each
+    waiting on the one below; the accent is the return path that
+    unwinds them: 4, then 3 + 4 = 7, then 1 + 2 + 7 = 10.
+    """
+    frames = [("total(tree)", "value 1", "returns 10"), ("total(child)", "value 3", "returns 7"),
+              ("total(child)", "value 4 · leaf", "returns 4")]
+    for i, (call, node, ret) in enumerate(frames):
+        y = i * 26
+        c.cell(0, y, call, w=104, h=22)
+        c.cell(104, y, node, w=92, h=22, soft=True)
+        c.label(224, y + 15, ret)
+    c.closed_arrow(208, 74, 208, 12, emphasis=True)
+
+
 
 
 def decorator_rebind(c: Canvas) -> None:
     """Decorators · before: name binds to function. After @dec: name binds to wrapper."""
     c.tag(0, 12, "before")
-    c.bind(0, 18, "f", "fn", "f₀", object_w=50, gap=20)
+    c.bind(0, 18, "f", "fn", "f₀", object_w=50, gap=26)
     c.tag(0, 70, "after @dec")
     c.name_box(0, 78, "f")
     c.closed_arrow(60, 90, 96, 90, emphasis=True)
@@ -671,16 +702,23 @@ def list_append(c: Canvas) -> None:
 
 
 def dict_buckets(c: Canvas) -> None:
-    """Dictionaries · hashed buckets; collisions chain into a neighbouring slot."""
-    c.tag(0, 12, "hash → bucket")
-    rows = [("0", '"a" → 1'), ("1", '"b" → 2'), ("2", '"c" → 3')]
-    for i, (idx, body) in enumerate(rows):
-        y = 18 + i * 24
-        c.label(0, y + 16, idx, anchor="start")
-        c.cell(14, y, body, w=80, h=24)
-    c.closed_arrow(96, 54, 132, 54, emphasis=True)
-    c.cell(134, 42, '"d" → 4', w=80, h=24, soft=True)
-    c.label(218, 58, "collision", anchor="start")
+    """Dictionaries · hash(key) picks the slot; the cell's insert lands in an empty one.
+
+    profile holds "name" and "language"; the cell adds "year". The hash
+    of the new key selects a slot directly, which is why neither the
+    insert nor profile["name"] scans the other entries. The accent is
+    the insert.
+    """
+    c.tag(120, 6, "slots")
+    rows = [('"name" → "Ada"', False), ('"language" → "Python"', False), ('"year" → 1843', True)]
+    for i, (body, new) in enumerate(rows):
+        y = 12 + i * 26
+        c.cell(120, y, body, w=150, h=22, soft=new)
+        c.label(278, y + 15, str(i), anchor="start")
+    c.cell(0, 64, 'hash("year")', w=78, h=22)
+    c.closed_arrow(78, 75, 118, 75, emphasis=True)
+
+
 
 
 # ─── Examples promoted from the gestalt: new paint code ──────────────
@@ -764,14 +802,25 @@ def positional_only_separator(c: Canvas) -> None:
     c.label(120, 50, "positional or kw", anchor="middle")
 
 
-def generator_ribbon(c: Canvas) -> None:
-    """Generators · execution paused between yields, resumed by next()."""
-    c.tag(0, 8, "paused between yields · resumed by next()")
-    c.ribbon(0, 16, 260, h=30, gates=[64, 136, 208], soft_segments=[(0, 64), (136, 208)])
-    c.mono(32, 36, "…")
-    c.mono(100, 36, "yield")
-    c.mono(172, 36, "…")
-    c.mono(244, 36, "yield")
+def generator_resume(c: Canvas) -> None:
+    """Generators · the cell's two next() calls on countdown(3), one ribbon each.
+
+    State over time (the iterator-unroll pattern applied to a generator):
+    each row is the body's timeline after one more next(). The soft
+    segment is the code that has run so far, the gates are the yields,
+    and the local n beside the row is the value that survived the pause.
+    The gates are the figure's single accent system.
+    """
+    gates = [60, 126, 192]
+    for gx in gates:
+        c.label(gx, 8, "yield", anchor="middle")
+    rows = [("3", "n=3"), ("2", "n=2")]
+    for i, (value, local) in enumerate(rows):
+        y = 14 + i * 34
+        # The ribbon runs past the last gate: after the third yield the
+        # body still has `n -= 1` and the loop test left to run.
+        c.ribbon(0, y, 224, h=22, gates=gates, soft_segments=[(0, gates[i])])
+        c.label(236, y + 15, f"next() → {value} · {local}")
 
 
 def truth_and_size(c: Canvas) -> None:
@@ -847,24 +896,38 @@ def guard_clauses(c: Canvas) -> None:
 
 
 def bytes_vs_bytearray(c: Canvas) -> None:
-    """Bytes vs bytearray · frozen sequence of integers vs mutable counterpart."""
+    """Bytes vs bytearray · the cell's own two bytes, frozen in one object and rewritten in the other.
+
+    Header-plus-buffer drawing (the Rust Book / Go-slices convention):
+    the bytes are shown as the integer slots they are. b"py" is frozen;
+    packet is the same two bytes in a bytearray, and packet[0] = ord("P")
+    overwrites slot 0 in place — the caret is the one accent.
+    """
     c.tag(0, 4, "bytes — frozen")
-    c.cell(0, 12, "b'\\\\x63\\\\x61\\\\x66'", w=160, h=24)
-    c.tag(0, 50, "bytearray — mutable")
-    c.cell(0, 58, "bytearray(b'\\\\x63\\\\x61')", w=180, h=24)
-    c.closed_arrow(180, 70, 218, 70, emphasis=True)
-    c.label(222, 67, ".append(0x66)", anchor="start")
+    c.cells(0, 12, ["0x70", "0x79"], w=44, h=22)
+    c.label(98, 27, 'b"py"')
+    c.tag(0, 48, "bytearray — mutable")
+    c.caret(22, 62, emphasis=True)
+    c.cells(0, 62, ["0x50", "0x79"], w=44, h=22)
+    c.label(98, 70, 'packet[0] = ord("P")')
+    c.label(98, 84, "bytearray(b'Py')")
 
 
 def sentinel_iteration(c: Canvas) -> None:
-    """Sentinel iteration · `iter(callable, sentinel)` calls until the sentinel returns."""
-    c.cell(0, 22, "iter(read, '')", w=120, h=24)
-    c.closed_arrow(120, 34, 152, 34, emphasis=True)
-    c.cell(154, 0, "value", w=70, h=20)
-    c.cell(154, 22, "value", w=70, h=20)
-    c.cell(154, 44, "value", w=70, h=20)
-    c.cell(154, 66, "''", w=70, h=20, ghost=True)
-    c.label(228, 80, "sentinel · stop", anchor="start")
+    """Sentinel iteration · iter(read_chunk, "") calls read_chunk until it returns the sentinel.
+
+    The cell's chunks are "py", "thon" and "": the first two are yielded,
+    the empty string is the sentinel that stops the loop and is never
+    yielded, which is why list(...) prints ['py', 'thon'].
+    """
+    c.cell(0, 22, 'iter(read_chunk, "")', w=140, h=24)
+    c.closed_arrow(140, 34, 172, 34, emphasis=True)
+    c.cell(174, 0, '"py"', w=70, h=20)
+    c.cell(174, 22, '"thon"', w=70, h=20)
+    c.cell(174, 44, '""', w=70, h=20, ghost=True)
+    c.label(250, 58, "sentinel · stop", anchor="start")
+
+
 
 
 def partial_functions(c: Canvas) -> None:
@@ -893,10 +956,10 @@ def args_kwargs(c: Canvas) -> None:
 def multiple_return(c: Canvas) -> None:
     """Multiple return values · the function returns a tuple; the caller unpacks it."""
     c.cell(0, 0, "def f(): return a, b", w=180, h=24)
-    c.closed_arrow(90, 26, 90, 44, emphasis=True)
-    c.cell(58, 44, "(a, b)", w=64, h=22, soft=True)
-    c.closed_arrow(90, 68, 90, 86, emphasis=False)
-    c.cell(50, 86, "x, y", w=80, h=22)
+    c.closed_arrow(90, 26, 90, 48, emphasis=True)
+    c.cell(58, 48, "(a, b)", w=64, h=22, soft=True)
+    c.closed_arrow(90, 72, 90, 94, emphasis=False)
+    c.cell(50, 94, "x, y", w=80, h=22)
 
 
 def lambda_expression(c: Canvas) -> None:
@@ -992,13 +1055,25 @@ def json_python_mapping(c: Canvas) -> None:
         c.mono(132, y, b, anchor="start", size=10)
 
 
-def regex_anchors(c: Canvas) -> None:
-    """Regular expressions · anchors and quantifiers shape what the pattern matches."""
+def regex_groups(c: Canvas) -> None:
+    """Regular expressions · the cell's own pattern, its two capture groups landing on one record.
+
+    findall returns only what the parentheses capture: ([A-Za-z]+) takes
+    the name and (\\d+) the score out of "Ada: 10". The groups are the
+    shaded stations of the pattern; dashed drops show where each one
+    lands in the text. No accent: the two groups are equals.
+    """
     c.tag(0, 4, "pattern")
-    c.mono(0, 24, "^\\d{2}-\\d{2}$", anchor="start")
-    c.tag(0, 56, "input")
-    c.cell(0, 64, "", w=200, h=20)
-    c.cell(40, 64, "12-34", w=120, h=20, soft=True)
+    c.cell(0, 10, "([A-Za-z]+)", w=76, h=20, soft=True)
+    c.cell(76, 10, ": ", w=22, h=20)
+    c.cell(98, 10, "(\\d+)", w=40, h=20, soft=True)
+    c.cell(0, 56, "Ada", w=28, h=20, soft=True)
+    c.cell(28, 56, ": ", w=22, h=20)
+    c.cell(50, 56, "10", w=22, h=20, soft=True)
+    c.dashed(38, 30, 14, 56)
+    c.dashed(118, 30, 61, 56)
+    c.label(14, 90, "name", anchor="middle")
+    c.label(61, 90, "score", anchor="middle")
 
 
 def number_parse(c: Canvas) -> None:
@@ -1011,14 +1086,35 @@ def number_parse(c: Canvas) -> None:
 
 
 def format_spec(c: Canvas) -> None:
-    """String formatting · the format spec is a railroad of named optional fields."""
-    c.tag(0, 4, "format spec")
-    stations = [("align", 36), ("sign", 30), ("width", 40), (",", 22), (".prec", 44), ("type", 32)]
-    x = 0
-    for label_text, w in stations:
-        c.cell(x, 16, label_text, w=w, h=18)
-        x += w + 2
-    c.label(0, 54, "{:>6,.2f}")
+    """String formatting · the format spec as a railroad: every station optional, order fixed.
+
+    A railroad in the SQLite-diagram sense: the main rail runs left to
+    right through every station in the grammar's fixed order. Drawing a
+    bypass over all seven stations made 53 elements, so the figure
+    traces one path instead: the cell's own spec, 05.1f. Stations it
+    visits are shaded; stations it skips are ghosted under a bypass rail.
+    """
+    stations = [("align", 38, False), ("sign", 32, False), ("0", 14, True), ("width", 38, True),
+                (",", 14, False), ("precision", 62, True), ("type", 32, True)]
+    rail_y = 36
+    lead, bypass = 10, 18
+    c.hairline(0, rail_y, lead, rail_y)
+    x = lead
+    for text, w, visited in stations:
+        if not visited:
+            # bypass rail: this spec skips the station, so the path
+            # goes up, across and down around it and the station ghosts
+            c.hairline(x, rail_y, x, rail_y - bypass)
+            c.hairline(x, rail_y - bypass, x + w + 12, rail_y - bypass)
+            c.hairline(x + w + 12, rail_y - bypass, x + w + 12, rail_y)
+        # rail through the station
+        c.hairline(x, rail_y, x + 6, rail_y)
+        c.cell(x + 6, rail_y - 9, text, w=w, h=18, soft=visited, ghost=not visited)
+        c.hairline(x + w + 6, rail_y, x + w + 12, rail_y)
+        x += w + 12 + 6
+    c.hairline(x - 6, rail_y, x + lead - 6, rail_y)
+    c.tag(0, 62, "this cell")
+    c.mono(0, 76, "{score:05.1f}", anchor="start")
 
 
 def truthy_check(c: Canvas) -> None:
@@ -1069,30 +1165,6 @@ def tuple_frozen(c: Canvas) -> None:
     c.dashed(190, 24, 270, 24)
 
 
-def value_types(c: Canvas) -> None:
-    """Values · every literal is a typed object: int, str, list, dict each carry their behaviour."""
-    rows = [("int", "42"), ("str", '"hi"'), ("list", "[1,2,3]"), ("dict", "{k:v}")]
-    for i, (t, v) in enumerate(rows):
-        y = i * 30
-        c.object_box(0, y, t, v, w=160, h=26, tag_position="inside")
-
-
-def literal_forms(c: Canvas) -> None:
-    """Literals · each type has its own literal spellings; the source spelling determines the value type."""
-    rows = [
-        ("int", "42  ·  0x2a  ·  0b101"),
-        ("float", "3.14  ·  1e-3"),
-        ("str", '"hi"  ·  \'hi\''),
-        ("list", "[1, 2, 3]"),
-        ("dict", "{k: v}"),
-        ("set", "{1, 2, 3}"),
-    ]
-    for i, (t, spellings) in enumerate(rows):
-        y = i * 22
-        c.cell(0, y, t, w=50, h=20, soft=True)
-        c.cell(52, y, spellings, w=200, h=20)
-
-
 def function_with_body(c: Canvas) -> None:
     """Functions · `def greet(name): return "Hello, " + name` takes input, computes, returns output."""
     c.closed_arrow(0, 36, 30, 36, emphasis=False)
@@ -1208,14 +1280,6 @@ def subprocess_spawn(c: Canvas) -> None:
     c.cell(254, 22, "output", w=70, h=24)
 
 
-def logging_levels(c: Canvas) -> None:
-    """Logging · five levels; messages below the configured threshold are dropped."""
-    levels = [("CRITICAL", "50"), ("ERROR", "40"), ("WARNING", "30"), ("INFO", "20"), ("DEBUG", "10")]
-    for i, (name, num) in enumerate(levels):
-        c.cell(0, i * 22, name, w=120, h=20)
-        c.cell(122, i * 22, num, w=40, h=20, soft=True)
-
-
 def aaa_pattern(c: Canvas) -> None:
     """Testing · arrange-act-assert: set up, run the behavior, compare the result."""
     rows = [("arrange", "set up state"), ("act", "perform behavior"), ("assert", "compare result")]
@@ -1320,14 +1384,6 @@ def isinstance_check(c: Canvas) -> None:
     c.cell(172, 50, "False", w=60, h=20)
 
 
-def collections_containers(c: Canvas) -> None:
-    """Collections module · four specialised containers for shapes the built-in types don't cover well."""
-    rows = [("deque", "fast appends both ends"), ("Counter", "key → count"), ("defaultdict", "missing key default"), ("namedtuple", "tuple with names")]
-    for i, (name, role) in enumerate(rows):
-        c.cell(0, i * 22, name, w=110, h=20)
-        c.cell(112, i * 22, role, w=170, h=20, soft=True)
-
-
 def typed_dict_shape(c: Canvas) -> None:
     """Structured data shapes · TypedDict names each key's value type; the dict obeys the declared shape."""
     c.frame(0, 0, 200, 86, label="User TypedDict")
@@ -1374,7 +1430,7 @@ def object_lifecycle(c: Canvas) -> None:
 def type_alias_name(c: Canvas) -> None:
     """Type aliases · complex annotation collapses to a single readable name."""
     c.cell(0, 30, "dict[str, list[tuple[int, str]]]", w=240, h=24, ghost=True)
-    c.closed_arrow(120, 54, 120, 70, emphasis=True)
+    c.closed_arrow(120, 54, 120, 76, emphasis=True)
     c.label(96, 66, "type Index = …", anchor="middle")
     c.cell(80, 76, "Index", w=80, h=24, soft=True)
 
@@ -1385,9 +1441,9 @@ def match_dispatch_ladder(c: Canvas) -> None:
     cases = ["case 0:", "case [x, y]:", "case Point(0, _):", "case _:"]
     for i, txt in enumerate(cases):
         c.cell(0, 30 + i * 22, txt, w=170, h=20)
-    c.dashed(186, 32, 186, 122)
+    c.dashed(186, 32, 186, 104)
     c.dot(186, 74)
-    c.closed_arrow(186, 110, 186, 124, emphasis=True)
+    c.closed_arrow(186, 104, 186, 124, emphasis=True)
     c.label(196, 76, "first match", anchor="start")
 
 
@@ -1428,8 +1484,8 @@ def container_methods(c: Canvas) -> None:
     for i, (syntax, method) in enumerate(rows):
         y = i * 28
         c.cell(0, y, syntax, w=120, h=22)
-        c.closed_arrow(120, y + 11, 158, y + 11, emphasis=(i == 1))
-        c.cell(160, y, method, w=110, h=22, soft=(i == 1))
+        c.closed_arrow(120, y + 11, 158, y + 11, emphasis=False)
+        c.cell(160, y, method, w=110, h=22)
 
 
 def structured_shapes(c: Canvas) -> None:
@@ -1442,12 +1498,76 @@ def structured_shapes(c: Canvas) -> None:
         c.cell(134, y, tradeoff, w=130, h=22, soft=(i == 2))
 
 # Registry: figure_name -> (paint_fn, viewbox_w, viewbox_h)
+def value_type_lookup(c: Canvas) -> None:
+    """Values · text names a str object; the type, not the name, carries upper().
+
+    The cell's own binding, then the lookup the cell prints:
+    type(text) is str, and str is where upper() (which the next cell
+    calls) lives. The dashed hop is type(). No accent: the binding and
+    the hop are equals.
+    """
+    c.bind(0, 30, "text", "str", '"python"', object_w=80, gap=28)
+    c.dashed(168, 46, 204, 46)
+    c.label(186, 40, "type()", anchor="middle")
+    c.frame(206, 22, 72, 44, label="class str")
+    c.mono(242, 48, "upper()")
+
+
+def logging_threshold(c: Canvas) -> None:
+    """Logging · records cross the handler's level gate; below it they are dropped.
+
+    The cell's own three records: debug falls below the handler's INFO
+    level and stops at the gate (dashed, ghosted); info and warning pass
+    through to stdout. The gate is the one accent.
+    """
+    c.tag(0, 6, "records")
+    c.tag(202, 6, "stdout")
+    c.frame(96, 0, 76, 112, label="handler")
+    for y, name, passes in [(14, "debug", False), (46, "info", True), (78, "warning", True)]:
+        c.cell(0, y, name, w=64, h=22, ghost=not passes)
+        if passes:
+            c.closed_arrow(64, y + 11, 200, y + 11, emphasis=False)
+            c.cell(202, y, name, w=64, h=22, soft=True)
+        else:
+            c.dashed(64, y + 11, 130, y + 11)
+    c.gate(134, 4, 108)
+    c.label(134, 124, "level=INFO", anchor="middle")
+
+
+def literal_forms(c: Canvas) -> None:
+    """Literals · each type has its own literal spellings; the source spelling determines the value type."""
+    rows = [
+        ("int", "42  ·  0x2a  ·  0b101"),
+        ("float", "3.14  ·  1e-3"),
+        ("str", '"hi"  ·  \'hi\''),
+        ("list", "[1, 2, 3]"),
+        ("dict", "{k: v}"),
+        ("set", "{1, 2, 3}"),
+    ]
+    for i, (t, spellings) in enumerate(rows):
+        y = i * 22
+        c.cell(0, y, t, w=50, h=20, soft=True)
+        c.cell(52, y, spellings, w=200, h=20)
+
+
+def collections_containers(c: Canvas) -> None:
+    """Collections module · four specialised containers for shapes the built-in types don't cover well."""
+    rows = [("deque", "fast appends both ends"), ("Counter", "key → count"), ("defaultdict", "missing key default"), ("namedtuple", "tuple with names")]
+    for i, (name, role) in enumerate(rows):
+        c.cell(0, i * 22, name, w=110, h=20)
+        c.cell(112, i * 22, role, w=170, h=20, soft=True)
+
+
 FIGURES: dict[str, tuple[Callable[[Canvas], None], int, int]] = {
+    "value-type-lookup": (value_type_lookup, 280, 80),
+    "logging-threshold": (logging_threshold, 266, 130),
+    "literal-forms": (literal_forms, 252, 132),
+    "collections-containers": (collections_containers, 284, 92),
     "aliasing-mutation": (aliasing_mutation, 220, 175),
     "tuple-no-mutation": (tuple_no_mutation, 220, 185),
     "iterator-unroll": (iterator_unroll, 220, 130),
     "scope-rings": (scope_rings, 216, 116),
-    "closure-cell": (closure_cell, 240, 120),
+    "closure-cell": (closure_cell, 280, 116),
     "slice-ruler": (slice_ruler, 232, 120),
     "branch-fork": (branch_fork, 232, 100),
     "loop-repetition": (loop_repetition, 260, 100),
@@ -1483,7 +1603,7 @@ def structured_shapes(c: Canvas) -> None:
     "reliability-boundary-map": (reliability_boundary_map, 286, 110),
     "reliability-operation-boundary": (reliability_operation_boundary, 354, 104),
     # Control flow + Iteration coverage gap (see audit)
-    "naming-decisions": (naming_decisions, 310, 98),
+    "naming-decisions": (naming_decisions, 330, 98),
     "early-exit": (early_exit, 144, 116),
     "lazy-stream": (lazy_stream, 300, 56),
     "control-decision-map": (control_decision_map, 244, 104),
@@ -1493,8 +1613,9 @@ def structured_shapes(c: Canvas) -> None:
     "iteration-protocol-map": (iteration_protocol_map, 306, 132),
     "iteration-lazy-pull": (iteration_lazy_pull, 360, 112),
     # Promoted from the gestalt — wired to example pages via ATTACHMENTS
-    "variables-bind": (variables_bind, 180, 44),
-    "call-stack": (call_stack, 200, 100),
+    "variables-bind": (variables_bind, 170, 44),
+    "constants-bind": (constants_bind, 194, 44),
+    "call-stack": (call_stack, 292, 80),
     "decorator-rebind": (decorator_rebind, 232, 110),
     "mro-chain": (mro_chain, 200, 152),
     "dataclass-fields": (dataclass_fields, 312, 76),
@@ -1503,7 +1624,7 @@ def structured_shapes(c: Canvas) -> None:
     "unpacking-bind": (unpacking_bind, 152, 80),
     "comprehension-equivalence": (comprehension_equivalence, 280, 76),
     "list-append": (list_append, 220, 36),
-    "dict-buckets": (dict_buckets, 270, 88),
+    "dict-buckets": (dict_buckets, 288, 92),
     # Newly designed paint code for examples that lacked a figure
     "number-lines": (number_lines, 260, 78),
     "expression-tree": (expression_tree, 220, 92),
@@ -1512,7 +1633,7 @@ def structured_shapes(c: Canvas) -> None:
     "sort-stability": (sort_stability, 270, 100),
     "kw-only-separator": (kw_only_separator, 200, 56),
     "positional-only-separator": (positional_only_separator, 200, 56),
-    "generator-ribbon": (generator_ribbon, 260, 50),
+    "generator-resume": (generator_resume, 318, 72),
     "truth-and-size": (truth_and_size, 232, 70),
     "descriptor-protocol": (descriptor_protocol, 222, 76),
     "bound-unbound": (bound_unbound, 296, 56),
@@ -1520,12 +1641,12 @@ def structured_shapes(c: Canvas) -> None:
     "callable-objects": (callable_objects, 220, 44),
     "attribute-lookup": (attribute_lookup, 242, 70),
     "guard-clauses": (guard_clauses, 264, 104),
-    "bytes-vs-bytearray": (bytes_vs_bytearray, 308, 86),
-    "sentinel-iteration": (sentinel_iteration, 320, 92),
+    "bytes-vs-bytearray": (bytes_vs_bytearray, 200, 90),
+    "sentinel-iteration": (sentinel_iteration, 330, 70),
     "partial-functions": (partial_functions, 334, 36),
     # Third coverage push: 24 more figures
     "args-kwargs": (args_kwargs, 280, 68),
-    "multiple-return": (multiple_return, 180, 110),
+    "multiple-return": (multiple_return, 180, 120),
     "lambda-expression": (lambda_expression, 170, 76),
     "property-fork": (property_fork, 232, 72),
     "metaclass-triangle": (metaclass_triangle, 300, 60),
@@ -1535,14 +1656,13 @@ def structured_shapes(c: Canvas) -> None:
     "enum-members": (enum_members, 280, 60),
     "datetime-instant": (datetime_instant, 280, 88),
     "json-python-mapping": (json_python_mapping, 220, 116),
-    "regex-anchors": (regex_anchors, 200, 92),
+    "regex-groups": (regex_groups, 140, 96),
     "number-parse": (number_parse, 204, 64),
-    "format-spec": (format_spec, 220, 64),
+    "format-spec": (format_spec, 372, 82),
     "truthy-check": (truthy_check, 240, 70),
     "boolean-truth-table": (boolean_truth_table, 132, 64),
     "set-buckets": (set_buckets, 156, 90),
     "tuple-frozen": (tuple_frozen, 280, 48),
-    "value-types": (value_types, 160, 116),
     "yield-delegation": (yield_delegation, 240, 84),
     "itertools-chain": (itertools_chain, 246, 82),
     "assertion-check": (assertion_check, 304, 76),
@@ -1553,7 +1673,6 @@ def structured_shapes(c: Canvas) -> None:
     "package-tree": (package_tree, 240, 76),
     "venv-boundary": (venv_boundary, 274, 76),
     "subprocess-spawn": (subprocess_spawn, 324, 60),
-    "logging-levels": (logging_levels, 164, 124),
     "aaa-pattern": (aaa_pattern, 250, 80),
     "socket-byte-boundary": (socket_byte_boundary, 364, 46),
     "gil-lanes": (gil_lanes, 300, 138),
@@ -1564,7 +1683,6 @@ def structured_shapes(c: Canvas) -> None:
     "literal-constrained": (literal_constrained, 144, 76),
     "callable-type": (callable_type, 352, 42),
     "isinstance-check": (isinstance_check, 232, 76),
-    "collections-containers": (collections_containers, 284, 92),
     "container-methods": (container_methods, 272, 82),
     "typed-dict-shape": (typed_dict_shape, 200, 92),
     "structured-shapes": (structured_shapes, 266, 82),
@@ -1577,7 +1695,6 @@ def structured_shapes(c: Canvas) -> None:
     "match-pattern-variants": (match_pattern_variants, 272, 96),
     "loop-else-gate": (loop_else_gate, 312, 76),
     # Sixth pass: lift the lingering 8.0-band figures with slug-specific paint
-    "literal-forms": (literal_forms, 252, 132),
     "function-with-body": (function_with_body, 334, 68),
 }
 
diff --git a/src/marginalia_grammar.py b/src/marginalia_grammar.py
index bf548cf..e47de23 100644
--- a/src/marginalia_grammar.py
+++ b/src/marginalia_grammar.py
@@ -25,19 +25,44 @@
 PAD_BOTTOM = 14
 
 # ─── Palette ───────────────────────────────────────────────────────────
-# Aligned with public/site.css design tokens. These are the only
-# colours figures may use; cards never pick a colour directly.
-#   INK       site --text         (warm dark brown)
-#   INK_SOFT  site --muted        (--text at 70%)
-#   EMPHASIS  site --accent       (the brand orange)
-#   SOFT_FILL site --accent-soft  (--accent at ~8%)
-INK = "#521000"
-INK_SOFT = "rgba(82, 16, 0, 0.7)"
-EMPHASIS = "#FF4801"
-# A neutral warm tint built from --text at 5%. Object boxes need to read as
-# quiet containers; tinting them with --accent-soft made every box look
-# highlighted, which broke the "emphasis is scarce" rule.
-SOFT_FILL = "rgba(82, 16, 0, 0.05)"
+# Figures paint with CSS custom properties, not literal colours. Inline
+# SVG inherits custom properties from the page, so one paint function
+# renders correctly in light mode, in dark mode, and on the social
+# cards: whichever stylesheet wraps the figure decides the ink. The
+# four names below are the only colours figures may use; cards never
+# pick a colour directly.
+#   INK       --fig-ink       the page's --text
+#   INK_SOFT  --fig-ink-soft  the page's --muted
+#   EMPHASIS  --fig-accent    the page's --accent
+#   SOFT_FILL --fig-soft      a quiet 5% tint of the ink (object boxes
+#                             must read as containers, not highlights)
+INK = "var(--fig-ink)"
+INK_SOFT = "var(--fig-ink-soft)"
+EMPHASIS = "var(--fig-accent)"
+SOFT_FILL = "var(--fig-soft)"
+
+# The concrete values behind those names, one set per colour scheme.
+# public/site.css must define both (a contract checks it); the gestalt
+# review pages and the social-card shell embed the light set through
+# figure_token_css() so a figure never renders with undefined ink.
+FIGURE_TOKENS_LIGHT = {
+    "--fig-ink": "#521000",
+    "--fig-ink-soft": "rgba(82, 16, 0, 0.7)",
+    "--fig-accent": "#FF4801",
+    "--fig-soft": "rgba(82, 16, 0, 0.05)",
+}
+FIGURE_TOKENS_DARK = {
+    "--fig-ink": "#F3E7DC",
+    "--fig-ink-soft": "rgba(243, 231, 220, 0.72)",
+    "--fig-accent": "#FF6B2E",
+    "--fig-soft": "rgba(243, 231, 220, 0.07)",
+}
+
+
+def figure_token_css(tokens: dict[str, str]) -> str:
+    """CSS declarations for one token set, ready to drop inside a rule."""
+    return " ".join(f"{name}: {value};" for name, value in tokens.items())
+
 
 # ─── Stroke weights ────────────────────────────────────────────────────
 W_HAIRLINE = 0.6
@@ -54,6 +79,11 @@
 TICK_LEN = 6
 NODE_R = 14
 ARROW_CLOSED = 7
+# Shortest arrow (shaft plus head) that still reads as an arrow. Below
+# this an arrow is mostly head — the naming-decisions "case" chain drew
+# 12-unit arrows that looked like stray wedges between boxes. Widen the
+# gap between the boxes instead of shrinking the arrow.
+ARROW_MIN = 20
 
 NAME_W = 60
 NAME_H = 24
@@ -63,9 +93,15 @@
 WORD_W = 44
 
 # ─── Typography ────────────────────────────────────────────────────────
+# Mono and sans follow the page's own stacks (public/site.css sets body
+# text to system-ui and code to ui-monospace) so a figure's labels are
+# set in the same faces as the code cell beside it. The site loads no
+# web fonts, so asking for JetBrains Mono or Source Sans here only
+# meant "whatever the OS falls back to". The italic serif stays: it is
+# the one deliberate contrast, reserved for identifiers.
 FONT_SERIF = "'Iowan Old Style', Charter, Georgia, serif"
-FONT_MONO = "'JetBrains Mono', 'IBM Plex Mono', Menlo, monospace"
-FONT_SANS = "-apple-system, 'Source Sans Pro', sans-serif"
+FONT_MONO = "ui-monospace, SFMono-Regular, Menlo, Consolas, monospace"
+FONT_SANS = "system-ui, -apple-system, 'Segoe UI', sans-serif"
 SIZE_BODY = 11
 SIZE_MONO = 10
 SIZE_SMALL = 9
@@ -74,12 +110,20 @@
 
 # ─── Text metrics ──────────────────────────────────────────────────────
 # Single source of truth for character advance. Paint code uses
-# MONO_ADVANCE (the font's exact advance) to compute positions; the
-# geometry contracts use BBOX_ADVANCE (deliberately conservative
-# over-estimates) to detect clipping and collision. Keeping both here —
-# instead of one in a paint comment and one in the test file — means a
-# recalibration happens in one place and both consumers move together.
-MONO_ADVANCE = 0.6  # JetBrains Mono advances 600/1000 units per em.
+# MONO_ADVANCE to compute positions; the geometry contracts use
+# BBOX_ADVANCE (deliberately conservative over-estimates) to detect
+# clipping and collision. Keeping both here — instead of one in a paint
+# comment and one in the test file — means a recalibration happens in
+# one place and both consumers move together.
+#
+# MONO_ADVANCE is not a guess about the visitor's font: every mono run
+# is emitted with textLength = len * MONO_ADVANCE * size and
+# lengthAdjust="spacing", so the browser spaces the glyphs to exactly
+# that advance whatever face the stack resolves to. Menlo and SF Mono
+# advance 0.6em natively; Consolas advances 0.55em and gets 0.05em of
+# letter-spacing. Dividers computed from MONO_ADVANCE therefore land on
+# the right character on every platform.
+MONO_ADVANCE = 0.6
 BBOX_ADVANCE = {
     "mono": 0.62,        # JetBrains Mono / IBM Plex Mono
     "sans_upper": 0.65,  # Source Sans Pro uppercase (tag font)
@@ -128,6 +172,11 @@ class Canvas:
     # shaft+head pair and a standalone gate line are indistinguishable.
     _accents: int = 0
     _gates_painted: bool = False
+    # Length of every closed arrow painted, for the minimum-length
+    # contract (ARROW_MIN). Recorded here because the shaft is shortened
+    # by the head in the emitted SVG, so the drawn geometry understates
+    # the arrow the author asked for.
+    _arrow_lengths: list[float] = field(default_factory=list)
 
     def accent_count(self) -> int:
         """Number of accent marks on the canvas, per the scarcity rule.
@@ -186,6 +235,7 @@ def closed_arrow(self, x1, y1, x2, y2, *, emphasis=False):
         weight = W_EMPHASIS if emphasis else W_STROKE
         dx, dy = x2 - x1, y2 - y1
         L = math.hypot(dx, dy) or 1
+        self._arrow_lengths.append(L)
         ux, uy = dx / L, dy / L
         end_x, end_y = x2 - ARROW_CLOSED * ux, y2 - ARROW_CLOSED * uy
         self._line(x1, y1, end_x, end_y, color=color, weight=weight)
@@ -194,17 +244,23 @@ def closed_arrow(self, x1, y1, x2, y2, *, emphasis=False):
         self._add(f'<polygon points="{x2},{y2} {bx + px},{by + py} {bx - px},{by - py}" fill="{color}"/>')
 
     # ── text ──────────────────────────────────────────────────────────
-    def _text(self, x, y, s, *, family, size, anchor, color, italic=False, tracking=None):
+    def _text(self, x, y, s, *, family, size, anchor, color, italic=False, tracking=None, length=None):
         attrs = [f'x="{x}"', f'y="{y}"', f'font-family="{family}"', f'font-size="{size}"',
                  f'fill="{color}"', f'text-anchor="{anchor}"']
         if italic:
             attrs.append('font-style="italic"')
         if tracking:
             attrs.append(f'letter-spacing="{tracking}"')
+        if length:
+            attrs.append(f'textLength="{length:g}" lengthAdjust="spacing"')
         self._add(f"<text {' '.join(attrs)}>{xml_escape(s)}</text>")
 
     def mono(self, x, y, s, *, anchor="middle", size=SIZE_MONO, color=INK):
-        self._text(x, y, s, family=FONT_MONO, size=size, anchor=anchor, color=color)
+        # Pin the run to MONO_ADVANCE per character so positions computed
+        # from it (mono_divider, register ticks under a literal) hold on
+        # every platform's monospace face.
+        length = len(s) * MONO_ADVANCE * size if s else None
+        self._text(x, y, s, family=FONT_MONO, size=size, anchor=anchor, color=color, length=length)
 
     def ident(self, x, y, s, *, anchor="middle", color=INK):
         self._text(x, y, s, family=FONT_SERIF, size=SIZE_BODY, anchor=anchor, color=color, italic=True)
@@ -217,14 +273,19 @@ def tag(self, x, y, s, *, anchor="start"):
                    anchor=anchor, color=INK_SOFT, tracking="0.5")
 
     # ── words ─────────────────────────────────────────────────────────
-    def name_box(self, x, y, name):
-        """Open rect with italic identifier. Returns right-edge midpoint."""
+    def name_box(self, x, y, name, *, w=NAME_W):
+        """Open rect with italic identifier. Returns right-edge midpoint.
+
+        Pass a wider `w` when the running example's name is longer than
+        the default box (MAX_RETRIES needs ~84); the figure should carry
+        the lesson's own names, not placeholders chosen to fit the box.
+        """
         self._add(
-            f'<rect x="{x}" y="{y}" width="{NAME_W}" height="{NAME_H}" fill="none" '
+            f'<rect x="{x}" y="{y}" width="{w}" height="{NAME_H}" fill="none" '
             f'stroke="{INK}" stroke-width="{W_STROKE}"/>'
         )
-        self.ident(x + NAME_W / 2, y + NAME_H / 2 + BASELINE, name)
-        return (x + NAME_W, y + NAME_H / 2)
+        self.ident(x + w / 2, y + NAME_H / 2 + BASELINE, name)
+        return (x + w, y + NAME_H / 2)
 
     def object_box(self, x, y, type_tag, value, *, w=OBJECT_W, h=OBJECT_H, soft=True, tag_position="above"):
         """Filled rect with type tag and value centered. Returns left-edge midpoint.
@@ -345,13 +406,40 @@ def lane(self, y, *, x0=20, x1=300, label=None):
             self.tag(x0 - 6, y + 3, label, anchor="end")
 
     # ── phrases ───────────────────────────────────────────────────────
-    def bind(self, x, y, name, type_tag, value, *, object_w=OBJECT_W, gap=40):
-        """name → object. The foundational picture."""
-        nx, ny = self.name_box(x, y + (OBJECT_H - NAME_H) / 2, name)
+    def bind(self, x, y, name, type_tag, value, *, object_w=OBJECT_W, gap=40, name_w=NAME_W):
+        """name → object. The foundational picture.
+
+        `gap` is the space between the two boxes; the arrow inside it is
+        gap - 4 long, so keep gap >= ARROW_MIN + 4.
+        """
+        nx, ny = self.name_box(x, y + (OBJECT_H - NAME_H) / 2, name, w=name_w)
         ox, oy = self.object_box(nx + gap, y, type_tag, value, w=object_w)
         self.closed_arrow(nx + 2, ny, ox - 2, oy)
         return (x, y, nx + gap + object_w, y + OBJECT_H)
 
+    def env(self, x, y, label, bindings, *, name_w=52, value_w=44, row_h=20, gap=6, pad=8, ghost=False):
+        """An environment frame with its bindings — the Python Tutor picture.
+
+        Each binding is (name, value): the name is an italic identifier,
+        the value sits in a mono cell beside it. Pass value "" to leave
+        the cell empty so the caller can arrow from it to a heap object.
+        Draw the frame ghost when the call has returned; the cells stay
+        solid because bindings can outlive their frame (that is what a
+        closure is). Returns (right_x, bottom_y, anchors) where
+        anchors[i] is the right-edge midpoint of binding i's value cell.
+        """
+        w = pad + name_w + value_w + pad
+        h = pad + len(bindings) * (row_h + gap) - gap + pad
+        self.frame(x, y, w, h, label=label, ghost=ghost)
+        anchors = []
+        for i, (name, value) in enumerate(bindings):
+            ry = y + pad + i * (row_h + gap)
+            self.ident(x + pad + name_w / 2, ry + row_h / 2 + BASELINE, name)
+            vx = x + pad + name_w
+            self.cell(vx, ry, value, w=value_w, h=row_h)
+            anchors.append((vx + value_w, ry + row_h / 2))
+        return (x + w, y + h, anchors)
+
     def two_names_one_object(self, x, y, tag_text, name_a, name_b, value, *, object_w=OBJECT_W):
         """Two names bound to one shared object — the aliasing picture.
 
diff --git a/src/templates/about.html b/src/templates/about.html
index 5aff8d7..60bf4c1 100644
--- a/src/templates/about.html
+++ b/src/templates/about.html
@@ -27,7 +27,7 @@ <h2>The quality gates</h2>
   </section>
   <section class="about-section">
     <h2>The design language</h2>
-    <p>Every page draws from the tokens below, and this section reads them from the same stylesheet it documents. In dark mode the warm palette inverts; <code class="syntax-inline">--figure-paper</code> stays light, so figures sit on a paper chip instead of being recoloured, and the terminal tokens keep the runner's output chip dark in both schemes.</p>
+    <p>Every page draws from the tokens below, and this section reads them from the same stylesheet it documents. In dark mode the warm palette inverts, and the figures invert with it: the drawing grammar paints only with the four <code class="syntax-inline">--fig-*</code> tokens, so every figure is recoloured by the page rather than sitting on a light chip. The terminal tokens keep the runner's output chip dark in both schemes.</p>
     <p class="cell-label">Color</p>
     <ul class="token-grid">
       <li class="token"><span class="token-swatch" style="--swatch: var(--accent)"></span><code>--accent</code></li>
@@ -46,7 +46,10 @@ <h2>The design language</h2>
       <li class="token"><span class="token-swatch" style="--swatch: var(--header-veil)"></span><code>--header-veil</code></li>
       <li class="token"><span class="token-swatch" style="--swatch: var(--header-veil-0)"></span><code>--header-veil-0</code></li>
       <li class="token"><span class="token-swatch" style="--swatch: var(--header-veil-solid)"></span><code>--header-veil-solid</code></li>
-      <li class="token"><span class="token-swatch" style="--swatch: var(--figure-paper)"></span><code>--figure-paper</code></li>
+      <li class="token"><span class="token-swatch" style="--swatch: var(--fig-ink)"></span><code>--fig-ink</code></li>
+      <li class="token"><span class="token-swatch" style="--swatch: var(--fig-ink-soft)"></span><code>--fig-ink-soft</code></li>
+      <li class="token"><span class="token-swatch" style="--swatch: var(--fig-accent)"></span><code>--fig-accent</code></li>
+      <li class="token"><span class="token-swatch" style="--swatch: var(--fig-soft)"></span><code>--fig-soft</code></li>
       <li class="token"><span class="token-swatch" style="--swatch: var(--terminal-bg)"></span><code>--terminal-bg</code></li>
       <li class="token"><span class="token-swatch" style="--swatch: var(--terminal-ink)"></span><code>--terminal-ink</code></li>
     </ul>
diff --git a/tests/test_app.py b/tests/test_app.py
index 83762dc..3be62ae 100644
--- a/tests/test_app.py
+++ b/tests/test_app.py
@@ -585,12 +585,14 @@ def test_css_defines_a_dark_palette(self):
         for token in ["--text:", "--muted:", "--page:", "--surface:", "--hairline:"]:
             self.assertIn(token, dark_block)
 
-    def test_dark_mode_keeps_marginalia_figures_on_light_paper(self):
+    def test_dark_mode_recolours_marginalia_figures_through_tokens(self):
         css = (ROOT / "public" / "site.css").read_text()
         dark_block = css.split("@media (prefers-color-scheme: dark)", 1)[1]
-        self.assertIn("--figure-paper", css)
-        self.assertIn(".cell-banner figure svg", dark_block)
-        self.assertIn(".journey-section-figure svg", dark_block)
+        for token in ("--fig-ink", "--fig-ink-soft", "--fig-accent", "--fig-soft"):
+            self.assertIn(token, dark_block)
+        # No light "paper chip" behind figures: the tokens do the work.
+        self.assertNotIn("--figure-paper", css)
+        self.assertNotIn(".cell-banner figure svg", dark_block)
 
     def test_optional_highlighters_retain_readable_server_fallbacks(self):
         page = render_example_page(get_example("values"))
diff --git a/tests/test_marginalia_geometry.py b/tests/test_marginalia_geometry.py
index 1d3e329..6f088e7 100644
--- a/tests/test_marginalia_geometry.py
+++ b/tests/test_marginalia_geometry.py
@@ -782,5 +782,101 @@ def test_no_solid_line_crosses_a_label(self):
         self.assertEqual(failures, [], "\n  " + "\n  ".join(failures))
 
 
+class FigureContentContract(unittest.TestCase):
+    """Contract 13: figure text is faithful to the page it sits on.
+
+    The bytes-and-bytearray figure shipped with doubled backslashes
+    (b'\\\\x63…') for months because every contract checked geometry and
+    none checked content. Two checks close that hole: no rendered text
+    may carry an escape artefact, and any mono label that contains a
+    backslash (an escape sequence the author typed by hand) must appear
+    verbatim in the Markdown source of an example it is attached to.
+    """
+
+    def test_no_text_carries_a_doubled_backslash(self):
+        failures: list[str] = []
+        for name, (paint, w, h) in ALL_FIGURES.items():
+            canvas = Canvas(w=w, h=h)
+            paint(canvas)
+            for kind, _attrs, content in parse_parts(canvas.parts):
+                if kind == "text" and "\\\\" in content:
+                    failures.append(f"{name}: {content!r}")
+        self.assertEqual(failures, [], "\n  " + "\n  ".join(failures))
+
+    def test_escape_sequences_in_attached_figures_appear_in_the_example(self):
+        from html import unescape
+
+        from src.example_loader import EXAMPLES_DIR
+
+        failures: list[str] = []
+        for slug, items in ATTACHMENTS.items():
+            source = (EXAMPLES_DIR / f"{slug}.md").read_text()
+            for _anchor, name, _caption in items:
+                paint, w, h = FIGURES[name]
+                canvas = Canvas(w=w, h=h)
+                paint(canvas)
+                for kind, _attrs, content in parse_parts(canvas.parts):
+                    label = unescape(content)
+                    if kind == "text" and "\\" in label and label not in source:
+                        failures.append(f"{slug} / {name}: {label!r} is not in the example source")
+        self.assertEqual(failures, [], "\n  " + "\n  ".join(failures))
+
+
+class FigureArrowLengthContract(unittest.TestCase):
+    """Contract 14: every arrow is at least ARROW_MIN long.
+
+    closed_arrow paints a 7-unit head; an arrow shorter than ~20 units
+    is mostly head and reads as a wedge wedged between two boxes rather
+    than a relation between them. The census comes from the grammar
+    (Canvas._arrow_lengths) because the emitted shaft is already
+    shortened by the head. Fix a failure by widening the gap between the
+    boxes, never by shrinking the head.
+    """
+
+    def test_no_arrow_is_shorter_than_the_minimum(self):
+        from src.marginalia_grammar import ARROW_MIN
+
+        failures: list[str] = []
+        for name, (paint, w, h) in ALL_FIGURES.items():
+            canvas = Canvas(w=w, h=h)
+            paint(canvas)
+            for length in canvas._arrow_lengths:
+                if length < ARROW_MIN:
+                    failures.append(f"{name}: arrow of {length:.1f} units (minimum {ARROW_MIN})")
+        self.assertEqual(failures, [], "\n  " + "\n  ".join(failures))
+
+
+class FigureThemeTokenContract(unittest.TestCase):
+    """Contract 15: the page defines the figure tokens the grammar paints with.
+
+    Figures emit var(--fig-ink) and friends instead of literal colours so
+    one paint function renders in both colour schemes. That only holds
+    if public/site.css defines every token in both the light :root and
+    the dark media block, with exactly the values the grammar documents;
+    a missing token renders as black in light mode and invisible ink in
+    dark mode, and neither is caught by the geometry contracts.
+    """
+
+    def test_site_css_defines_every_token_in_both_schemes(self):
+        from pathlib import Path
+
+        from src.marginalia_grammar import FIGURE_TOKENS_DARK, FIGURE_TOKENS_LIGHT
+
+        css = (Path(__file__).resolve().parents[1] / "public" / "site.css").read_text()
+        light, dark = css.split("@media (prefers-color-scheme: dark)", 1)
+        failures: list[str] = []
+        for scheme, block, tokens in (("light", light, FIGURE_TOKENS_LIGHT), ("dark", dark, FIGURE_TOKENS_DARK)):
+            for name, value in tokens.items():
+                if f"{name}: {value};" not in block:
+                    failures.append(f"{scheme}: expected `{name}: {value};`")
+        self.assertEqual(failures, [], "\n  " + "\n  ".join(failures))
+
+    def test_every_painted_colour_is_a_token_reference(self):
+        from src.marginalia_grammar import EMPHASIS, INK, INK_SOFT, SOFT_FILL
+
+        for constant in (INK, INK_SOFT, EMPHASIS, SOFT_FILL):
+            self.assertRegex(constant, r"^var\(--fig-[a-z-]+\)$")
+
+
 if __name__ == "__main__":
     unittest.main()