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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.

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Claude Code v2.1.221

CCR client can adopt refreshed auth pushed over the event stream

Under the hood
Useful2 Signal0
Auth not in their notes

Long sessions can pick up fresh credentials pushed over the live connection instead of dropping out.

CLAUDE_CODE_ENVIRONMENT_KIND
What

The realtime client can take new credentials delivered inside the event stream instead of waiting for a local refresh.

Details
  • the client accepts an adoptRefreshedAuth callback and invokes it when an event carries refreshed_auth
  • session wiring supplies the callback only when CLAUDE_CODE_ENVIRONMENT_KIND is unset
  • environments that set CLAUDE_CODE_ENVIRONMENT_KIND get no callback and keep the previous behaviour
Evidence

adoptRefreshedAuth

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 v2.1.221 →