Investigated whether spawned subagents get their own collapsing card.
They don't: groupConversation/_isFoldable (activity_cluster.dart) treats
Task/Agent tool-uses like any non-diff tool, so consecutive spawns merge
into one "Activity / N steps" cluster. T-263/T-264/T-338 only shaped what
renders INSIDE one agent card. Filed T-342 (under T-276) for the
complement: break distinct Agent spawns out into their own labelled cards.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
jpmschweitzerandClaude Opus 4.8
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