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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

Per-request baseUrl override, used for filestore transfers

Under the hood
Useful2 Signal0
Elsewhere

File downloads can now come from a server-supplied host, but only for unauthenticated requests.

What

The internal HTTP helper can take a base URL from the request itself, which the filestore staging path now uses to fetch from a server-supplied host.

Details
  • the override returns a request-supplied baseUrl only when the request is unauthenticated (auth: "none") and the host is not "frame"
  • the filestore credential response now carries a filestoreUrl, passed as baseUrl on readFile requests
  • a warning event is emitted when the server sends a URL that is rejected
Evidence

stage_file_filestore_url_rejected

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

See this entry in the whole of v2.1.223 →