curl https://agent.example.com/v1/agents/sessions/sess_01J5X8/subagents/sub_01D/turns/turn_02C \
  -H "Authorization: Bearer <api-key>"

{
  "id": "turn_02C",
  "session_id": "sess_01J5X8",
  "subagent_id": "sub_01D",
  "status": "completed",
  "items": [
    {
      "id": "msg_02A",
      "role": "user",
      "content": "Summarize this document"
    },
    {
      "id": "msg_02B",
      "role": "assistant",
      "content": "The document discusses..."
    }
  ]
}