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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.

← All of v2.1.251 Home All releases ←olderv2.1.250

Claude Code v2.1.251 28 Aug 2026

More proxy and cloud-SDK variables handled for sandboxed subprocesses

You'll notice

Useful3 Signal2

Sandbox

More proxy and cloud-SDK variables pass through correctly to sandboxed subprocesses.

What

The list of environment variables given special handling when spawning sandboxed processes now covers additional proxy and cloud-SDK entries, including the Google Cloud SDK proxy address.

Details

The list is applied unconditionally by the environment-handling code.

Evidence

CLOUDSDK_PROXY_ADDRESS

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.251 →