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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 v2.1.238

Worker client drops duplicate events and can treat proxy 403s as transient

Under the hood
Useful1 Signal1
Telemetry

The background worker now drops duplicate telemetry events within an upload and logs how many.

What

The background worker's event batcher now discards events repeating a uuid within a single upload and logs how many it dropped.

Details
  • HTTP failures can carry a nonOriginRefusal marker, and the heartbeat streak reset skips those statuses.
  • A new constructor option nonOrigin403Transient decides whether such a 403 is retried; it defaults to false in this build.
  • The worker epoch is now read through a helper instead of parsing CLAUDE_CODE_WORKER_EPOCH inline.
Evidence

repeated-uuid durable event(s) from one /worker/events POST

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

See this entry in the whole of v2.1.238 →