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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.309 ·

Sandbox failure error says running outside the sandbox is not allowed either

When a required sandbox fails to start, the error now says dangerouslyDisableSandbox is not allowed either

You'll notice Improvements
JSON All of v2.1.309
You'll noticeTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
SandboxArea: what it touches
ImprovementsKind: in v2.1.309,
ImprovementsSection of the release
What

The sandbox limits what commands can reach on your machine. When the sandbox is required but fails to start, the error message used to end with advice to restart or fix your settings. It now adds: "Running it outside the sandbox (dangerouslyDisableSandbox) is not allowed either."

Why

When the sandbox is mandatory, you learn straight away that dangerouslyDisableSandbox will not get the command to run, so you can fix the sandbox instead of retrying without it.

Read from
Names in the bundledangerouslyDisableSandbox

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