### 1 · SendMessage: a commit that does not exist
POST /a2a/jsonrpc HTTP/1.1
Host: localhost:41241
Content-Type: application/json
A2A-Version: 1.0

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "SendMessage",
  "params": {
    "message": {
      "messageId": "4462ebfc-5f91-4ef0-9cfb-ac6e7687a66e",
      "role": "ROLE_USER",
      "parts": [
        {
          "text": "Run the unit tests for payments-api at commit deadbee"
        }
      ]
    }
  }
}

HTTP/1.1 200 OK
Content-Type: application/json

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "task": {
      "id": "8ae21dcb-7449-4d90-82a6-ac01b20fd782",
      "contextId": "b94d852b-2a8c-4a94-98ca-59286e63871e",
      "status": {
        "state": "TASK_STATE_FAILED",
        "message": {
          "messageId": "dfc0f22a-ebc5-4883-b3ce-4926752f0a2e",
          "contextId": "b94d852b-2a8c-4a94-98ca-59286e63871e",
          "taskId": "8ae21dcb-7449-4d90-82a6-ac01b20fd782",
          "role": "ROLE_AGENT",
          "parts": [
            {
              "text": "Commit deadbee does not exist in payments-api."
            }
          ]
        },
        "timestamp": "2026-10-06T09:00:03.000Z"
      },
      "history": [
        {
          "messageId": "4462ebfc-5f91-4ef0-9cfb-ac6e7687a66e",
          "contextId": "b94d852b-2a8c-4a94-98ca-59286e63871e",
          "taskId": "8ae21dcb-7449-4d90-82a6-ac01b20fd782",
          "role": "ROLE_USER",
          "parts": [
            {
              "text": "Run the unit tests for payments-api at commit deadbee"
            }
          ]
        },
        {
          "messageId": "9fa1a30d-bbc4-4e13-b779-cc5ca9176a3a",
          "contextId": "b94d852b-2a8c-4a94-98ca-59286e63871e",
          "taskId": "8ae21dcb-7449-4d90-82a6-ac01b20fd782",
          "role": "ROLE_AGENT",
          "parts": [
            {
              "text": "Checking out deadbee"
            }
          ]
        }
      ]
    }
  }
}