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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 v2.1.246 ·

The SDK transport can ask the main loop whether it is still working

The SDK transport can now ask the main loop whether it's truly idle before saying so.

Under the hood Internal Changes
JSON All of v2.1.246
Under the hoodTier: how much it should matter to you
3Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
SDKArea: what it touches
Internal ChangesKind: in v2.1.246,
Internal ChangesSection of the release
What

The transport used by the SDK and bridge gained a way to register a liveness probe, so when the last pending permission or dialog request resolves it announces idle rather than running if the main loop reports it has nothing to do.

Details
  • Print/headless mode registers the probe from its idle gate.
  • If the probe throws, the failure is recorded under the existing per_task_stop_sparing event with reason liveness_probe_throw and the session is reported as not idle.
  • Present on this build wherever the SDK or bridge transport is used, with no flag.
Evidence

setMainLoopLiveness

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

See this entry in the whole of v2.1.246 →

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