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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

Comments can show they were sent to Claude by someone else

You'll notice
Useful3 Signal3
Artifacts

Comments record who sent them to Claude, and Claude leaves someone else's thread alone.

What

Comments on an artifact now record who sent them to Claude. When a comment came from a different person's session, the attribution line says it was sent to Claude by someone else, and Claude is told to leave that thread to them unless you explicitly ask it to take over.

Details
  • Backed by a new sentByViewer field on comment records.
  • Affects both the rendered comment heading and the instructions Claude reads about how to treat the thread.
Evidence

sent to Claude by someone else

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 →