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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 v2.1.242

Three new messages between local sessions for handing over Artifact replies

Not switched on
Useful2 Signal5
Artifacts Notable

Local sessions gained wire messages for handing Artifact comment replies from one session to another.

What

The local socket that Claude Code sessions use to talk to each other gained yield_artifact_replies, unyield_artifact_replies and artifact_replies_yielded, the wire messages behind moving Artifact comment replies between sessions.

Details
  • Each message has a defined shape: page slugs, a message id, a reason of resume or claim, a send timestamp, and the requesting session's working directory and tmux details.
  • Before giving up the subscription, the receiver checks the requester is a live session of the same conversation, matching both session id and process id, and refuses stale requests.
  • If the answer cannot be delivered back, the hand-over is reverted.
  • No feature flag guards the new messages; telemetry is recorded under "artifact_comments_autoreact" and "artifact_live_subscribe".
Evidence

[uds-messaging] yield_artifact_replies refused: requester is not a verified live session of this conversation

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

See this entry in the whole of v2.1.242 →