[garethpotter]

I got Claude to add some tests. It also contributed a fix for the one you just added:

this test failed 7 times in 30 on unmodified main. The 100 ms wait meant to follow a client's disconnect ran before the client was closed, so the next round connected immediately. The server then sometimes refused it because the previous client's slot hadn't been freed yet. Debug logging confirmed this. Moving the client into its own scope so the wait comes after the close fixed it; the server code is fine.

[amitchone]

A great catch on the intermittently failing test, it failed 14/30 for me just now