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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 v2.1.248

Sandbox failures now report a specific cause

You'll notice
Useful3 Signal2
Sandbox

Sandbox failures now name the stage that broke instead of a generic error.

What

The sandbox layer raises named errors instead of generic ones, so a failure says which stage broke: init, an unavailable bridge, no sandbox for this shell, a command too long, or a policy refusal carrying its own reason.

Details
  • Ships with a schema for per-host network policy entries: an action of allow or deny plus optional HTTP methods.
Evidence

SandboxPolicyRefusalError

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 v2.1.248 →