{"type": "session.model_change", "timestamp": "2026-11-12T13:01:25.807Z", "sessionId": "24b447c3-5837-44fe-86ce-9bdb3b8ac2a2", "data": {"previousModel": null, "newModel": "Model B", "source": "startup"}}
{"type": "session.usage_record", "timestamp": "2026-11-12T13:01:27.492Z", "sessionId": "24b447c3-5837-44fe-86ce-9bdb3b8ac2a2", "usage": {"model": "Model B", "reasoningEffort": "medium"}}