{
  "method": "sessionUpdate",
  "args": [
    {
      "sessionId": "test-session-id",
      "update": {
        "sessionUpdate": "agent_message_chunk",
        "content": {
          "type": "text",
          "text": "*Context compacted to fit the model's context window.*\n\n"
        }
      }
    }
  ]
}