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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

Artifact asset downloads carry document version metadata

Under the hood
Useful1 Signal1
Artifacts

Artifact asset fetches now report which document version the asset belongs to.

What

Fetching an artifact asset now also reports the document's content hash and sequence number when the server sends them, letting Claude Code tell which version of a document an asset belongs to.

Details
  • The hash is accepted only when the header is exactly 64 hex characters; the sequence number only when it is at most 15 digits. Otherwise the fields are absent.
  • Also fixes the non-frame asset branch to read its content type from the same response headers the frame branch uses.
Evidence

docSha256

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

See this entry in the whole of v2.1.248 →