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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

Artifact script check no longer fooled by escaped-tag tricks

You'll notice
Useful3 Signal2
Artifacts

Artifact scripts can no longer sneak past the approval check using escaped markup tricks.

What

The embedded artifact skill's check for which scripts are approved was tightened so markup that a browser tokenizer reads one way and the checker read another can no longer slip through.

Details
  • Whitespace trimming now uses exactly the HTML ASCII whitespace set instead of JavaScript's trim, so characters the tokenizer treats as text are no longer trimmed away.
  • A new open-tag walker tracks quoted attribute values, so a > inside a quoted value no longer ends the tag early.
  • A comment opener combined with a script opener inside script data is now refused outright rather than modelled.
  • The approved hash for the decisions block changed to match, and comments mark the parallel implementation these must stay in sync with.
Evidence

script-not-blessed

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 →