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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

Artifact comment monitors say exactly who holds them

You'll notice
Useful2 Signal2
Artifacts

If resuming can't take back Artifact comment replies, you now get a specific reason and advice instead of one vague message.

What

When you resume a session and it cannot take back automatic replies to comments on an Artifact, the single old "held by a background session" state is replaced by three specific reasons, each with concrete advice.

Details
  • held_by_live_session: "this conversation is also open in …", followed by advice to close those sessions or stop the agent.
  • held_by_job: "they were last turned on from a background agent of this conversation, which keeps them while it runs (see claude agents)".
  • other_org: "this Artifact is in another of your organizations. Run /login and sign in to that organization".
  • Telemetry on artifact_live_subscribe reports matching reasons resume_held_live, resume_held_job and resume_holder_unknown plus holder counts.
  • Reachable by anyone resuming a session that had a live Artifact; no flag.
Evidence

held_by_live_session

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 →