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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 v2.1.222

Artifact comment auto-reply understands "sent to Claude" lanes

You'll notice
Useful3 Signal0
Artifacts

Artifact comment threads now track which comments were actually sent to you, and re-sending one triggers a reply.

What

Comment threads are now classified per comment into human, agent and unknown lanes, and sending or re-sending a comment to Claude is itself a trigger for auto-reply rather than only a new comment being one.

Details
  • each comment carries a lane; a toClaudeAt timestamp marks it as sent to Claude
  • new trigger kind redesignated covers existing comments newly toggled to Claude, tracked through a per-thread sentToClaudeAt map
  • the composed prompt now explains the row heads [human], [assistant], [human, sent to you] and [unverified lane]
Evidence

A human sent an EXISTING comment in the thread to you on an artifact you published

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

See this entry in the whole of v2.1.222 →