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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

Reads of artifacts you have a local copy of come back with a note about it

You'll notice
Useful2 Signal2
Artifacts

Reading an artifact you have a local copy of now notes that copy in the result.

What

When Claude Code reads an artifact whose page it has already probed as a live document, the successful read result now has an extra note appended describing your local working copy.

Details
  • Applies only after a successful read (HTTP 200), and only when the live-document module is present and reports the page as a probed live doc.
  • The note text is fetched asynchronously and appended to the read result; without the module or the probe, the read result is unchanged.
Evidence

workingCopyNoteAfterRead

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 →