{
  "type": "session.ready",
  "session_id": "sess_abc123"
}

{
  "type": "session.updated"
}

{
  "type": "session.error",
  "code": "invalid_format",
  "message": "Invalid message format"
}

{
  "type": "input.speech.started"
}

{
  "type": "input.speech.stopped"
}

{
  "type": "transcript.user.delta",
  "text": "What's the weather in"
}

{
  "type": "transcript.user",
  "text": "What's the weather in Tokyo?",
  "item_id": "item_abc123"
}

{
  "type": "reply.started",
  "reply_id": "reply_abc123"
}

{
  "type": "reply.audio",
  "data": "EAAgADAAQAAwACAAEAAAAPD/4P/Q/8D/"
}

{
  "type": "transcript.agent",
  "text": "It's currently 22°C and sunny in Tokyo.",
  "reply_id": "reply_abc123",
  "item_id": "item_abc123",
  "interrupted": false
}

{
  "type": "reply.done"
}

{
  "type": "tool.call",
  "call_id": "call_abc123",
  "name": "get_weather",
  "arguments": {
    "location": "Tokyo"
  }
}

{
  "type": "session.update",
  "session": {
    "system_prompt": "You are a concise assistant.",
    "greeting": "Hi — how can I help?",
    "input": {
      "format": {
        "encoding": "audio/pcm"
      },
      "turn_detection": {
        "vad_threshold": 0.5
      }
    },
    "output": {
      "voice": "ivy",
      "format": {
        "encoding": "audio/pcm"
      },
      "volume": 100
    },
    "tools": [
      {
        "type": "function",
        "name": "get_weather",
        "description": "Get weather for a city",
        "parameters": {
          "type": "object",
          "properties": {
            "city": {
              "type": "string"
            }
          },
          "required": [
            "city"
          ]
        }
      }
    ]
  }
}

{
  "type": "session.resume",
  "session_id": "sess_abc123"
}

{
  "type": "input.audio",
  "audio": "EAAgADAAQAAwACAAEAAAAPD/4P/Q/8D/"
}

{
  "type": "tool.result",
  "call_id": "call_abc123",
  "result": "{\"temp_c\": 22, \"description\": \"Sunny\"}"
}

{
  "type": "reply.create",
  "instructions": "Let the customer know we're still processing the transfer."
}