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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 v2.1.228

Cloud client registry and error responses with headers

Under the hood
Useful1 Signal2
API Client

Bedrock and Vertex clients register themselves, and local server errors can now carry response headers.

What

Bedrock and Vertex clients now add themselves to a module-level set when constructed, and the local server's JSON error helper accepts optional response headers so an error can carry things like an auth challenge.

Evidence

request_id

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 v2.1.228 →