You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
SubagentsArea: what it touches
ImprovementsKind: in v2.1.251,
ImprovementsSection of the release
What
Messages arriving on the REPL bridge that belong to a subagent are now dropped on arrival instead of being processed as if you had typed them, which prevents replayed subagent activity from starting a new top-level turn.
Evidence
Ignoring parented user frame at ingress (echo/replay of a subagent frame)
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
