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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 v2.1.227

Sandbox refusal now tells you how to turn sandboxing on

Use it now
Useful4 Signal2
Sandbox

Sandbox refusals now hand you the exact setting to enable and point at /sandbox.

/sandbox"sandbox": {"enabled": true}
What

When a request is refused because sandboxing is disabled on the device, the message now includes the exact settings to add, "sandbox": {"enabled": true}, and points at the /sandbox command to check the current state.

Evidence

refused: sandboxing is not enabled on this device. Set "sandbox": {"enabled": true} in Claude Code settings on the device (check with /sandbox) and retry.

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 v2.1.227 →