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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 v2.1.234

SDK reports where an API key actually came from

Under the hood
Useful2 Signal2
SDK

The SDK now reports where an API key really came from, like the env var or an apiKeyHelper.

ANTHROPIC_API_KEYapiKeyHelper
What

The credential-source values in the SDK schema now lead with what current CLIs really emit: ANTHROPIC_API_KEY, apiKeyHelper, /login managed key and none. The previous set (user, project, org, temporary, oauth) remains only as documented legacy so existing types keep compiling.

Evidence

'user' | 'project' | 'org' | 'temporary' | 'oauth' are legacy members that current CLIs never emit

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 v2.1.234 →