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 v2.1.240 Home All releases olderv2.1.239 v2.1.241newer
Claude Code v2.1.240

Saving a default effort level can now scope it to one model

Not switched on
Useful3 Signal4
Effort Levels Notable

Your saved default effort could apply per model instead of everywhere, but that is off.

Per-model effort defaults are implemented behind the tengu_russet_plover gate; with it off you still get one global setting.

Feature flag
tengu_russet_plover 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 v2.1.240: on

Read once, for one account on one subscription tier, against v2.1.240. It isn't a statement about your account. What a flag value here can and cannot tell you

What

Previously, saving a default effort wrote both a global setting and a per-model one. With the tengu_russet_plover gate on, it now writes only the per-model entry, so the default applies to the model you are using rather than everything. With the gate off, which is the built-in default, it writes only the global setting.

Details
  • The gate is remote, tengu_russet_plover, fallback off.
  • Model names that would collide with built-in JavaScript object property names also fall back to the global-only write.
Evidence

{ effortLevel: t, modelSettings: { [r]: { effortLevel: t } } }

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 v2.1.240 →