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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

Compaction and rewind notify a shared subsystem

Under the hood
Useful1 Signal3
Compaction

Compaction cleanup and rewind both notify a shared hook with a reason string.

What consumes the hook is not visible here.

What

Cleaning up after a conversation compaction and rewinding a conversation both call the same new hook with a reason string, and rewind sends a second call with "rewind". Existing rewind telemetry is unchanged. What consumes the hook is not visible here.

Evidence

tengu_conversation_rewind

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 →