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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 v2.1.234 Home All releases ←olderv2.1.233 v2.1.235newer→

Claude Code v2.1.234 17 Aug 2026

Backgrounding is cancelled if Artifact comment monitors started after you pressed the key

You'll notice

Useful2 Signal2

Artifacts

Backgrounding is cancelled if new artifact watchers started while you were confirming; press the key again.

What

If new Artifact comment monitors appeared between your first press of the background key and the confirmation, the session cancels the backgrounding, prints how many monitors started, and asks you to press the key again to review and confirm.

Details

No flag guards this check; it applies whenever monitors start during the confirmation window.

Evidence

Press \u2190 again to review and confirm.

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

See this entry in the whole of v2.1.234 →