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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.308 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.248 ·

Finished background tasks would carry their output tail

Completion notices would carry a finished task's output tail, on a disabled path.

Nothing to try yet In Development
JSON All of v2.1.248
Nothing to try yetTier: how much it should matter to you
1Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
Background TasksArea: what it touches
In DevelopmentKind: in v2.1.248,
In DevelopmentSection of the release

Part of the background-task delivery path compiled off in this build.

What

On the delivery path that is compiled off in this build, a finished background task's output tail is read before the completion notice goes out, so the notice would arrive with the tail attached.

Details
  • If the read fails, the task is delivered without the tail and a warning "output tail unreadable, delivering without it" is logged.
  • Sits behind the same compiled-off guard as the GetTask surface, so nothing reaches users here.
Evidence

output tail unreadable, delivering without it

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

See this entry in the whole of v2.1.248 →

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