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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 ·

Backgrounding a session no longer fails when the worker is already running

Sending a session to a background agent succeeds when the worker is already running.

You'll notice Bug Fixes
JSON All of v2.1.246
You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
Background TasksArea: what it touches
Bug FixesKind: in v2.1.246,
Bug FixesSection of the release
What

Sending the session to a background agent with the left arrow now counts an already-running worker as a successful hand-off instead of treating it as a failure. A spawn that neither succeeded, queued, nor is alive now abandons the hand-off and runs an extra cleanup pass.

Details
  • The spawn is given a worker name, and session scratch state gets a second cleanup call.
Evidence

tengu_open_agents_via_left

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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