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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 v2.1.239

Credentials are handed down rather than read from global state

Under the hood
Useful1 Signal3
Auth

Credentials are now passed explicitly into most subsystems rather than read from a global store.

What

Instead of each subsystem reaching for a process-global credential store, callers now pass a credentials value down. It affects API request builders, MCP connect paths, artifact and frame relay calls, model validation, token counting, feedback drafts, plugin and marketplace fetches, and device registration.

Details
  • React call sites that previously pulled only the storage handle off the app-context hook now take both it and credentials together.
  • The handle exists only when a pinned storage-mode check passes and a storage handle is present; otherwise callers get nothing and the old paths apply.
  • Occurrences of the field rise from 151 in 2.1.238 to 599 here.
  • Groundwork for per-session and per-account credential isolation; nothing changes for a single-account session.
Evidence

credentials: t.credentials, CredentialsStoreHandle

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 v2.1.239 →