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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 v2.1.234

Publish-only stub mode for the artifact tool

Not switched on
Useful2 Signal4
Artifacts

A restricted artifact mode accepts only a plain publish and rejects everything else.

A publish-only artifact mode rejects other actions with stub_mode_publish_only; nothing selects it here.

What

A restricted artifact mode is present in which the tool accepts only a plain publish. Any other explicit action, and any live-doc input, is rejected both when validating input and at call time with the error code stub_mode_publish_only.

Details
  • A URL that does not resolve while in this mode is rejected as stub_mode_real_url or stub_mode_unknown_slug.
  • The not-logged-in check now passes when this mode is active, so publishing works without a login.
  • Two artifact onboarding tips were narrowed so they do not appear in this mode.
  • The whole thing is active only when the stub-mode accessor returns a value; otherwise every existing artifact behaviour is unchanged.
Evidence

stub_mode_publish_only

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

See this entry in the whole of v2.1.234 →