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Sweep 28 Sep 2026 · 18:16Z Build v2.1.284 505 read Stable v2.1.277 Latest v2.1.284 Next v2.1.284 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.284 ·

Shell tools stop offering the sandbox escape when unsandboxed commands are disabled

When unsandboxed commands are turned off, Bash and PowerShell no longer offer Claude the dangerouslyDisableSandbox option

Group of 2 You'll notice Improvements
JSON All of v2.1.284
You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
SandboxArea: what it touches
ImprovementsKind: in v2.1.284,
ImprovementsSection of the release

What

The sandbox is a restricted environment that shell commands run inside, which limits what they can reach. Each tool Claude can use comes with a schema, a description of the inputs Claude is allowed to fill in. The Bash and PowerShell tools have an input called dangerouslyDisableSandbox, which asks to run a command outside the sandbox.

The schemas are now trimmed to match your sandbox settings:

  • dangerouslyDisableSandbox is removed from the Bash and PowerShell input schemas when the sandbox settings report unsandboxedCommandsDisabled.
  • run_in_background is still removed separately from the Bash schema when background tasks are disabled.
  • For another schema, the same trimming also removes run_in_background and _simulatedSedEdit.
  • The setup that turns off both background tasks and unsandboxed commands is applied where the tool schemas are listed.

Before this release, the schemas kept dangerouslyDisableSandbox in these cases. It was only listed as an input that would be refused if Claude used it.

Why

If your setup does not allow commands to run outside the sandbox, Claude is no longer shown an option it cannot use. It therefore cannot try to escape the sandbox and then be refused.

Read from
Names in the bundledangerouslyDisableSandbox
How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtIt is not clear which way of running Claude Code turns unsandboxed commands off in this way.

See this entry in the whole of v2.1.284 →

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