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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.246

Backgrounding a session warns that running workflow subagents restart

You'll notice
Useful4 Signal2
Background Tasks

Backgrounding a session now warns that still-running workflow subagents restart from the beginning.

What

The exit-to-background dialog and the fork/background confirm dialog now count workflow subagents separately and tell you that any still running will restart from the beginning, while finished ones are kept. The confirm button label changes to match.

Details
  • The count is also reported in telemetry as a new field, workflow_agent_count.
  • Appears wherever workflow subagents exist in the session.
Evidence

workflow_agent_count

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

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.246 →