What
Feature flags are switches Claude Code reads to turn behaviour on or off. This release adds a hook to the code that sets them up, plus an unrelated small change in Google sign-in.
profileFlagHost: the feature-flag client setup now includes aprofileFlagHosthook, and a served-bearer SDK client configuration gains a version of it that does nothing.- Google token exchange: the Google sign-in client that exchanges credentials (STS) now gets its own
Gaxiostransporter, the component that sends its web requests, built from the existing transporter's default settings.
Why
Neither change alters anything you see. The hook looks like internal plumbing. The transporter change may mean the token exchange now follows the same default settings, such as proxy settings, as other Google sign-in requests.