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 v2.1.219 Home All releases olderv2.1.218 v2.1.220newer
Claude Code v2.1.219

Bundled workflows can gate model invocation at runtime; deep-research wired to a new flag

Not switched on
Useful3 Signal4
Workflows Notable

Claude could start deep research on its own instead of waiting for you to ask, if enabled.

Deep-research model invocation is now decided by gate tengu_sorrel_avocet, which falls back to false, keeping it user-invoked only.

Feature flag
tengu_sorrel_avocet 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 v2.1.219: not a boolean we can read

These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.

Read once, for one account on one subscription tier, against v2.1.219. It isn't a statement about your account. What a flag value here can and cannot tell you

/deep-research
What

Workflow registration accepts a function for disableModelInvocation, and the bundled deep-research workflow now uses one so a remote flag can decide whether the model may invoke it.

Details
  • When converting a workflow to a command the code checks typeof e.disableModelInvocation === "function" and calls it; v2.1.218 only ever read a boolean.
  • deep-research previously registered { disableModelInvocation: !0 }, meaning user-invocable only.
  • It now passes a function checking gate tengu_sorrel_avocet with fallback false, so absent a remote value behaviour is identical to before.
  • If the gate is turned on remotely, the model can invoke deep-research itself.
Evidence

tengu_sorrel_avocet

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

See this entry in the whole of v2.1.219 →