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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 v2.1.247 ·

Background task text is escaped before it reaches the prompt

Background task names and errors are escaped before reaching the model, limiting what they can instruct.

You'll notice Improvements
JSON All of v2.1.247
You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
Background TasksArea: what it touches
ImprovementsKind: in v2.1.247,
ImprovementsSection of the release
What

Task descriptions, IDs, terminal summaries and errors are escaped before being placed into the prompt, including the system reminder listing tasks stopped by a container restart. This limits what task metadata can do to the model's instructions.

Details
  • Applies both to the restart notice and to the summary and error text written when a task finishes.
Evidence

The container was restarted. The following background tasks were running and are now stopped:

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

See this entry in the whole of v2.1.247 →

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