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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.

← All of v2.1.251 Home All releases ←olderv2.1.250
Claude Code v2.1.251

Read, reply to, and resolve comment threads on published artifacts

Use it now
Useful4 Signal5
Artifacts Notable

Claude can read, reply to and resolve comment threads on your published artifacts.

What

A new tool works on comment threads left by viewers of a published artifact. It supports reading threads (paged by thread id and cursor), posting a reply, and marking a thread resolved. Resolving is refused entirely in plan mode, and reading comments after an unattended new-comments notification asks you to confirm even in channels that normally auto-allow.

Details
  • Replies are validated before sending: invisible and control characters are rejected, byte length is capped, and repeated identical answers are blocked.
  • Comment text comes from artifact viewers, so the confirmation prompt names that explicitly when the read was triggered by a notification rather than by you.
Evidence

Claude wants to read the comment threads on ${ro(o)} — prompted by the new-comments notification; comment text is written by artifact viewers

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

See this entry in the whole of v2.1.251 →