You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
SubagentsArea: what it touches
ImprovementsKind: in v2.1.222,
ImprovementsSection of the release
What
When a subagent cannot get the model it asked for, the notify callback now carries a reason distinguishing a same-family step-down from inheriting the parent's model, and the message shown downstream differs accordingly.
Details
Reason is either family_step_down, meaning a fallback within the same model family was picked, or parent_inherit, meaning the subagent fell back to the parent session's model.
Evidence
family_step_down
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
