Follow Discord
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 ·

Background task output can start with a harness preamble

Background task output can carry an extra block of harness text ahead of the task's own output.

Under the hood New Features
JSON All of v2.1.246
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
Background TasksArea: what it touches
New FeaturesKind: in v2.1.246,
New FeaturesSection of the release
What

The tool that returns a background task's output can now print an extra block of harness-supplied text ahead of the task's own output, trimmed and separated from it by a blank line, inside the same output element.

Details
  • Only rendered when the task actually supplies the field; otherwise the output is unchanged.
Evidence

harnessHead

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 →

Feedback