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

New remote flag tengu_cobalt_plinth_thrift, off without a server value

Not switched on
Useful1 Signal3
Artifacts

A new artifact-related server switch exists and stays off without a server value.

tengu_cobalt_plinth_thrift is defined with a false fallback and what it controls is not visible.

Feature flag
tengu_cobalt_plinth_thrift Not enough to say

Nothing here resolved what this flag was doing on this version, so nothing here should be read as on or off.

This account: no value returned · anonymous baseline: no value returned · 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

A gate sits next to the artifact enablement code, reading the remote config flag tengu_cobalt_plinth_thrift and requiring an exact true. Its fallback is false, so with no server value the feature behind it is off. What it switches is not evident from the surrounding code.

Details
  • No environment variable or settings key sets it; it is decided entirely by remote config.
Evidence

tengu_cobalt_plinth_thrift

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

See this entry in the whole of v2.1.242 →