Source Intelligence

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 v2.1.239 Home All releases olderv2.1.238 v2.1.240newer
Claude Code v2.1.239

Artifact request schema: auto_reply gated, embeds compiled out

Not switched on
Useful2 Signal4
Artifacts Notable not in their notes

Artifact auto-reply appears only with comments enabled, and an embeds field is compiled out entirely.

auto_reply needs CLAUDE_CODE_ARTIFACT_COMMENTS or a remote flag defaulting off; embeds sits behind a false build constant.

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 v2.1.239: on

Read once, for one account on one subscription tier, against v2.1.239. It isn't a statement about your account. What a flag value here can and cannot tell you

CLAUDE_CODE_ARTIFACT_COMMENTS
What

The auto_reply field of the artifact request schema now appears only when artifact comments are enabled, via the CLAUDE_CODE_ARTIFACT_COMMENTS environment variable or, failing that, the remote flag tengu_teal_corbel whose fallback is off. A separate embeds field sits behind a build-time constant set to false, so it never appears in the shipped schema.

Evidence

auto_reply

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 v2.1.239 →