You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
ModelsArea: what it touches
ImprovementsKind: in v2.1.222,
ImprovementsSection of the release
What
A subagent or teammate asking for a model that is not in availableModels now falls to the newest allowed model in the same family rather than straight to the parent or default model.
Details
Only applies when a same-family allowed model exists; otherwise the old parent/default fallback still runs.
Emits telemetry code family_alias_stepped_down and a matching warning log.
Evidence
family_alias_stepped_down
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
