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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

Notice when the command sandbox is turned off mid-session

You'll notice
Useful3 Signal3
Sandbox

Turning off sandboxing mid-session now tells Claude the old restrictions no longer apply.

What

When sandboxing is disabled, the model is now told directly that commands run without sandbox restrictions and that earlier sandbox instructions no longer apply, so it does not keep working around limits that are gone.

Details
  • Two new lists of refusal reasons ship alongside it: write refusals (compliance_restricted, org_mismatch, org_toggle_disabled, summon_foreign_sender, user_entitlement_denied, write_gate_disabled) and device-binding refusals (bind_attestation_stale, bound_session_unattested_write, untrusted_device).
Evidence

Commands now run without sandbox restrictions; the earlier sandbox instructions no longer apply.

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 →