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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 v2.1.227 ·

Sandbox and container detection folded into one cached prober

Docker, bubblewrap and root-outside-sandbox checks share one cached prober that answers false until ready.

Under the hood No documentation found Internal Changes
JSON All of v2.1.227
Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
SandboxArea: what it touches
Internal ChangesKind: in v2.1.227,
Internal ChangesSection of the release
What

Docker, bubblewrap, running as root outside a deliberate sandbox, and "contained with no internet" checks now live in a single class that caches each probe. One gate additionally requires an internal-network probe to come back empty. Its synchronous accessor reports false until the asynchronous checks have settled, so very early callers see the negative answer. The bubblewrap and IS_SANDBOX=1 signals are Linux-only.

Evidence

passesAntDspEnvGateSync

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

Read from
Names in the bundleIS_SANDBOX

See this entry in the whole of v2.1.227 →

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