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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 v2.1.251 ·

Background task output files copied more safely, and failures now surface

Background task output files move more safely and now report failures instead of hiding them.

You'll notice Improvements
JSON All of v2.1.251
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
ImprovementsKind: in v2.1.251,
ImprovementsSection of the release
What

When a background task's output file resolves outside the expected directory and has to be moved back into it, the copy now refuses to follow symlinks, refuses to overwrite an existing file, verifies the file identity before and after, and copies in bounded chunks. If anything goes wrong after the initial safety check the operation now fails with a clear reroot error instead of silently swallowing it.

Details
  • Applies to background and bash task output-path handling, with no gate.
Evidence

reroot failed after the gate

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

See this entry in the whole of v2.1.251 →

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