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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 v2.1.227

Bash results say when a background command dies with its agent

You'll notice
Useful3 Signal2
Bash Tool

Bash results now flag a background command that dies when its subagent finishes.

What

A backgrounded command started by a synchronous subagent is now marked in the tool result, because it gets killed when that subagent gives its final response. The field is absent when the command outlives its starter, as in the main loop or an async subagent.

Evidence

backgroundEndsWithFinalResponse

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 v2.1.227 →