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 v2.1.247 Home All releases olderv2.1.246 v2.1.248newer
Claude Code v2.1.247

tengu_cobalt_plinth_fennel appears once, with no visible caller

Not switched on
Useful1 Signal4
Artifacts Notable not in their notes

A new artifact relay flag is read by one function that nothing appears to call.

tengu_cobalt_plinth_fennel is compiled off, read once, and its reader has no visible caller anywhere in the build.

Feature flag
tengu_cobalt_plinth_fennel Off in both readings

The flag server returned off for the account this site reads and for the anonymous baseline. A reading of off cannot rule out a rollout these two readings sit outside of.

This account: off · anonymous baseline: off · compiled default in v2.1.247: not a boolean we can read

Read once, for one account on one subscription tier, against v2.1.247. It isn't a statement about your account. What a flag value here can and cannot tell you

tengu_cobalt_plinth_fennel
What

A new artifact-relay flag, compiled to off, is read by a single small function whose name was freed up by renaming the route-classifying helper that used to own it. No call to that function appears in the surrounding module, and the flag name occurs exactly once in the whole build.

Details
  • Name reuse across scopes in this build means a caller elsewhere cannot be ruled out; either way the fallback is off, so whatever it selects needs a server-side value.
  • Live in the same module: the relay now reports once per session, under artifact_frame_relay / bot_context_not_served, that bot contexts are not relayed.
Evidence

tengu_cobalt_plinth_fennel

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

See this entry in the whole of v2.1.247 →