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 v2.1.223 Home All releases olderv2.1.222 v2.1.224newer

GrowthBook auth header resolution is now async and gated

Under the hood
Useful1 Signal1
Internals

Feature-flag requests can now attach auth asynchronously, but that path stays off in this build.

The authed feature-flag request path requires a gate whose fallback is false, so it never runs here.

Feature flag
tengu_gb_eval_authed_enable 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 v2.1.223: on

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 v2.1.223. It isn't a statement about your account. What a flag value here can and cannot tell you

What

Eval-authed requests and GrowthBook client init await an async auth-header resolver behind a predicate rather than calling the synchronous header builder.

Details
  • On resolver failure the error is logged and the request continues without auth.
  • Client init aborts if the account changed mid-flight.
  • The eval-authed path still requires tengu_gb_eval_authed_enable, whose fallback is false, so it is off in this build.
Evidence

GrowthBook: auth header resolution failed (

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 v2.1.223 →