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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 v2.1.223

Telemetry for transient background-job state read failures

Under the hood
Useful2 Signal0
Background Jobs

Background job state read failures now report themselves once per job instead of silently falling back to a cache.

What

A failed read of a background job's state now reports itself once per job before falling back to the cached copy, so intermittent storage problems are visible.

Details
  • fires on backend errors and on parse/read exceptions, and only if that job has not already reported
  • the event carries the errno and whether a cached state existed
  • oversized state files are skipped with a warning instead of being parsed
Evidence

tengu_bg_state_read_transient

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 v2.1.223 →