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

Cobalt-plinth flags renamed again

Under the hood
Useful1 Signal3
Artifacts

Several artifact feature switches were renamed and re-gated, discarding any prior rollout.

Renamed cobalt-plinth flags fall back off, so anything under the old names is reset.

Feature flag
tengu_cobalt_plinth_madder 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 v2.1.242: off

tengu_cobalt_plinth_sorrel Off by default, switched on for this account

The shipped code defaults this off, and the flag server returned on for the one account this site reads on this version. That is the reading that makes the entry above worth a second look, and it still says nothing about your account.

This account: on · anonymous baseline: on · compiled default in v2.1.242: off

tengu_cobalt_plinth_thistle 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

tengu_cobalt_plinth_tansy 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

tengu_loop_noop_fold 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: not a boolean we can read

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

One capability now needs tengu_cobalt_plinth_madder as well as the existing tengu_cobalt_plinth_sorrel; both fall back to true, so it passes without a server value. Two others were renamed to tengu_cobalt_plinth_thistle and tengu_cobalt_plinth_tansy, replacing a yarrow-named flag and tengu_loop_noop_fold, and both fall back to false. Renaming a flag discards whatever rollout the server had under the old name.

Evidence

tengu_cobalt_plinth_madder

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 →