[nolnoch]

Problem

• Seven known flakes (Flake: omp hosted logout test reads root status once (retrying vs paused) #606, Flake: opencode-v2 reload drain test times out in Hosted strict, 4 of the last 15 master runs #613, Flake: pi_family 'same session opened twice' quits before the receipt, so the at-least-once replay fails the test #614, test: binding.test.ts "7: a dead holder's row doesn't hide a pre-upgrade session" flakes under full-suite load #445, Local-mode MCP child can stop reading stdin when a push overlaps a request (CI flake in local.test.ts) #457, two from chore: #456 flake follow-ups: unexplained hosted strict failure, #445/#457 families, job durations #466) keep turning master, release and PR runs red on code they don't touch; Flake: opencode-v2 reload drain test times out in Hosted strict, 4 of the last 15 master runs #613 alone failed 4 of the last 15 master runs and the v2.4.1 release PR twice.

Value

• A red run means a regression again, and a release stops costing re-runs.

Solution

• Each test now waits on the condition it depends on: a test-only change, no retries, no longer timeouts. One cause (Local-mode MCP child can stop reading stdin when a push overlaps a request (CI flake in local.test.ts) #457) is a Bun 1.4.4 runtime bug, fixed on Bun canary.

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Per issue (cause, fix, evidence)

Issue	Cause	Fix	Evidence
#606 omp hosted logout	Read /grayboard status once; a root whose subscription closed first sits in retrying until its next reopen meets the sign-out (backoff 250·2^n ms, controller.ts:493)	until() both roots read signed out + paused	omp scenario green
#613 reload drain	~750 autocommitted writes to an on-disk fixture, one synced commit each; 6–12 s on a slow CI disk	Fixture PRAGMA synchronous = OFF, the 250 inserts in one transaction	With fullfsync on (a slow-disk stand-in): 355 ms → 45 ms
#614 pi_family opened twice	Holder quit before its receipt; at-least-once replay to the next holder is correct	Wait for the holder's receipted record before quitting	15/15 (was 5/8 failing on master)
#445 binding "7: dead holder"	The v1 binary answers initialize before it listens on sock.fe when a SIGKILLed holder left a stale socket	until(poke("fe")), the bind's own probe, before binding	Measured: not listening at handshake end 2/20 with a stale socket, 0/20 without; 10/10 under 14-spinner load
#457 local stall	Bun 1.4.4 drops a child's stdout read in the test process when a request overlaps a push	Wait out the pushes in "dm_inbox lists what you owe" (both sides)	Repro (wait removed, 14 spinners): Bun 1.4.4 3/40 fail, canary 1.4.4-canary.20261106.1 0/160. #457 stays open to bump the Bun pin when a stable release ships
#466 omp killed child	until(() => holder() !== undefined && holder() !== first) reads twice: first then undefined (dead hold released, new one not yet taken) passes, then a third read sees the gap	One read per poll; until returns the id it saw (also the #580 scenario)	No product gap: every alias_holds delete is id-scoped (dropHold, session_end)
#466 bridge sleeps	Fixed Bun.sleep then exact call counts	Wait until the outbox is drained: store.done runs only after every Slack/bus call for the row	bridge suite green
#466 mcp.test.ts legacy registry	Bun.sleep(1100) sized to one tick of the 1 s idle sweep; Bun.sleep(0) before exact stream/watch counts	untilHosted on the counts and on the sweep's effect	50/50 reruns
New: mcp.test.ts "a refusal attaching an idle legacy GET…" (found by this PR's own pre-push hook)	Waits 1 s for a GET the SDK client reopens after its 1000 ms initialReconnectionDelay	5 s window, as line 835 already uses for the same reopen	Whole file under 14-spinner load: 4/10 runs failing → 0/10
#619 opencode-v2 host attachments ENOENT (found by this PR's flake hunt)	The fixture model handed the queued tool call to whichever session asked first; the DM to fe woke the receiver, whose turn could take attachment_get	Each invoke puts a nonce in its prompt; the call is issued only to the request carrying it	Attachments case, direct and CodeMode, 3 local runs each: 6/6; flake-hunt on 9b34efd