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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 v2.1.221

Un-activated threads return guidance rather than an error

Not switched on
Useful2 Signal2
Artifacts

Replying in a thread where Claude was never activated now explains the situation instead of erroring.

Artifact comment replies handle un-activated threads with guidance, but sit behind the artifact-comments gate.

What

Replying to a thread where the human has not activated Claude produces an explanation instead of a failure that invites a retry.

Details
  • The reply is not posted and the tool result states that this is the expected state and that retrying will not help.
  • Successful replies tell Claude that viewers see the comment attributed to Claude via the user.
  • Behind the artifact-comments gate.
Evidence

Reply not posted: Claude is not activated on this comment thread.

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

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.221 →