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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 v2.1.228

Env vars set to an empty string now count as unset

You'll notice
Useful3 Signal2
Configuration

Environment variables set to an empty string now count as unset and use the default.

What

Two environment-reading helpers changed so that a variable set to an empty string or to whitespace reads as absent and the default applies, rather than yielding an empty value.

Details
  • The Deno code path also gained the same fallback, which it was missing.
Evidence

globalThis.Deno.env?.get?.(e)?.trim()

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 v2.1.228 →