{
  "_doc": "L2 contract_mismatch: round 1 fails (auth-be 500 vs auth-fe expects 401), round 2 passes after Architect patches SDD + L1 reruns.",
  "sequence": [
    {
      "_variant": "round1-fail",
      "chunks": [
        "## step 0 · 读 units.json + integration/spec.json\n",
        "## step 1-4 · 起 be 进程,跑 case-add-list\n",
        "case 失败: POST /todos 返 500, 期望 201/400 (contract 不一致)\n"
      ],
      "result": "mock-ok devloop-integrator[round1] FAILED: contract mismatch",
      "files": [
        {
          "path": "integration/runs/run-mock-l2-1/result.json",
          "content": "{\n  \"ok\": false,\n  \"crashed\": false,\n  \"run_id\": \"run-mock-l2-1\",\n  \"summary\": { \"total\": 1, \"passed\": 0, \"failed\": 1 },\n  \"failures\": [{\n    \"case_id\": \"case-add-list\",\n    \"failed_step\": 0,\n    \"involves\": [\"todo-be\", \"todo-fe\"],\n    \"got\": { \"status\": 500, \"body\": {} },\n    \"expected\": { \"status\": 201 },\n    \"stderr_excerpt\": \"TypeError: cannot read property text\"\n  }],\n  \"duration_ms\": 1234\n}\n"
        },
        {
          "path": "integration/runs/run-mock-l2-1/process.log",
          "content": "[todo-be] starting on :18001\n[todo-be] TypeError at server.js:8\n[todo-be] exited code 1\n"
        },
        {
          "path": "integration/runs/run-mock-l2-1/http-trace.ndjson",
          "content": "{\"ts\":1747139000,\"unit\":\"todo-be\",\"method\":\"POST\",\"url\":\"http://127.0.0.1:18001/todos\",\"status\":500}\n"
        }
      ]
    },
    {
      "_variant": "round2-pass",
      "chunks": [
        "## L2 round 2 (after SDD patched + L1 reran)\n",
        "case-add-list 通过 ✓\n"
      ],
      "result": "mock-ok devloop-integrator[round2] PASS: integration green",
      "files": [
        {
          "path": "integration/runs/run-mock-l2-2/result.json",
          "content": "{\n  \"ok\": true,\n  \"crashed\": false,\n  \"run_id\": \"run-mock-l2-2\",\n  \"summary\": { \"total\": 1, \"passed\": 1, \"failed\": 0 },\n  \"failures\": [],\n  \"duration_ms\": 980\n}\n"
        }
      ]
    }
  ]
}