Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
WorkflowsArea: what it touches
ImprovementsKind: in v2.1.248,
ImprovementsSection of the release
What
Subagents started by workflow orchestration get a system prompt requiring the answer to come back as one specific structured tool call rather than as text, and to retry once if the schema validation fails before ending the turn.
Evidence
Do NOT put your answer in a text response.
Strings lifted out of the shipped bundle, so the claim above can be checked against them.