Example

{
  "type": "session.output_transcript.delta",
  "event_id": "evt_output_transcript_001",
  "delta": "Would you like me to reserve that table?",
  "start_ms": 5400,
  "end_ms": 7200
}

session.delegation.created

Returned when the Live model delegates work to your application or a Responses backend. Contains delegation metadata and the position on the session timeline where the work was delegated.