Source Intelligence
Follow Discord

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 v2.1.221 Home All releases ←olderv2.1.220 v2.1.222newer→
Claude Code v2.1.221

Artifact live-update arming carries auto-react wiring

Not switched on
Useful2 Signal3
Artifacts not in their notes

Artifact live-update watching now carries the plumbing needed for automatic comment replies and cancellation.

Auto-react wiring in artifact live updates is gated on CLAUDE_CODE_ARTIFACT_COMMENTS, off by default.

Feature flag
tengu_teal_corbel On for this account, and not off by default

The flag server returned on for the one account this site reads, and nothing in this release compiles it off by default. The compiled default is shown below, and says which it is when we cannot read one: a fifth of gates compile in a string or a number rather than on or off, and most published releases have no gate table behind them at all. No client can see what the server returns for your account.

This account: on · anonymous baseline: on · compiled default in v2.1.221: on

These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.

Read once, for one account on one subscription tier, against v2.1.221. It isn't a statement about your account. What a flag value here can and cannot tell you

CLAUDE_CODE_ARTIFACT_COMMENTS
What

The arming path for artifact live updates now threads through the plumbing that makes auto-replies work, keyed off whether the Artifact tool schema exposes comment verbs.

Details
  • Takes autoReactWiring and freshPublishWiring, decided by whether thread_id is present in the Artifact tool schema.
  • When present it builds a notify channel posting task notifications tagged with source "artifact-auto-react", plus an AbortController per slug.
  • If a watch is already active the wiring is stashed so a later arm picks it up.
  • Cancellation is now checked before arming rather than after.
  • Same gate as the comments feature: CLAUDE_CODE_ARTIFACT_COMMENTS or tengu_teal_corbel, fallback false.
Evidence

commentVerbsInSchema

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 →