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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.242 ·

Sandbox requirements attached to a remote call are enforced before Bash spawns

Commands arriving with sandbox constraints are refused unless a fully confining sandbox exists.

You'll notice New Features
JSON All of v2.1.242
You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
4Signal: worth watching, 1 to 5
SandboxArea: what it touches
New FeaturesKind: in v2.1.242,
What probably matters to youSection of the release
What

When a call arrives with constraints attached, Bash now refuses to run it unless a fully confining sandbox is available, and refuses outright if the constraints carry extra file read/write deny lists, which cannot yet be enforced locally. Both refusals emit sandbox telemetry and the command never starts.

Details
  • Only applies when the incoming call actually carries constraints; ordinary local Bash calls are unaffected.
  • The deny-list refusal is unconditional rather than degrading to an unsandboxed run.
Evidence

This call carries file deny lists that cannot be enforced here yet; the command was not run.

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.242 →

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