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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 v2.1.248

Job state records a taken session ID

Under the hood
Useful1 Signal1
Background Tasks

A background job now records when its session ID was already taken.

What

A settled background job now writes a sessionIdTaken marker when its session ID was already in use, so anything reading job state can tell that case apart from other failures.

Evidence

sessionIdTaken

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 v2.1.248 →