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 v2.1.242 Home All releases olderv2.1.241 v2.1.243newer
Claude Code v2.1.242

Artifact comment reading now sits behind a server-side switch

Not switched on
Useful3 Signal4
Artifacts Notable

Reading artifact comments is now behind a server switch that is off, so nothing is fetched.

Comment reading requires tengu_onyx_sluice, which falls back off and returns a "not available right now" message.

Feature flag
tengu_onyx_sluice 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 v2.1.242: on

Read once, for one account on one subscription tier, against v2.1.242. It isn't a statement about your account. What a flag value here can and cannot tell you

What

Reading comments on an Artifact is gated on tengu_onyx_sluice, which falls back to off in this build. With it off nothing is fetched at all and you get "comments are not available on this artifact right now", counted as cp_read_disabled. With it on, transport errors and HTTP 5xx or 499 are retried once after a random backoff and the unavailable message includes the HTTP status.

Details
  • Retries are reported as server_read_retried.
  • The old path that fetched comment JSON directly from the content host is gone, along with its __frame_t and json_egress_blocked handling.
Evidence

cp_read_disabled

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 v2.1.242 →