You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
Bash ToolArea: what it touches
ImprovementsKind: in v2.1.227,
ImprovementsSection of the release
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.
