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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.232

Remote session close reasons are classified in one table

Under the hood
Useful2 Signal2
Sessions

A session taken over on another device is now reported as such instead of a generic disconnect.

What

Close codes from the remote session connection now map to named outcomes in a shared table, so a session that was taken over elsewhere is reported as ended elsewhere rather than as a generic transport close.

Details
  • Taken over by a worker maps to superseded; an inactive session maps to archived; epoch conflicts, missing causes, 403 and 404 map to an unknown supersession.
Evidence

session_not_active

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.232 →