{
  "operation": "Stream Agent Message (SSE)",
  "method": "POST",
  "path": "/v1/agents/{agent_id}/messages/stream",
  "auth": "Bearer token (LETTA_API_KEY)",
  "request": {
    "method": "POST",
    "path": "/v1/agents/agent-2f6d4a13/messages/stream",
    "headers": {
      "Authorization": "Bearer $LETTA_API_KEY",
      "Content-Type": "application/json",
      "Accept": "text/event-stream"
    },
    "body": {
      "messages": [
        {
          "role": "user",
          "content": "Summarize our last conversation."
        }
      ],
      "stream_tokens": true
    }
  },
  "response": {
    "status": 200,
    "headers": {
      "Content-Type": "text/event-stream"
    },
    "body_excerpt": "event: message_chunk\ndata: {\"message_type\":\"reasoning_message\",\"reasoning\":\"Recall last...\"}\n\nevent: message_chunk\ndata: {\"message_type\":\"assistant_message\",\"content\":\"Last time you asked about...\"}\n\nevent: done\ndata: [DONE]\n"
  }
}