{
  "test_suite": "M4 API & Concurrency Stress Test",
  "timestamp": "2026-10-10T12:12:36Z",
  "total_assertions": 243,
  "passed_assertions": 240,
  "metrics": {
    "matrix_guards": {
      "shots_with_closed_lips": 25,
      "all_shots_have_audio_guard": true,
      "all_shots_have_10s_duration": true
    },
    "concurrency_flood": {
      "total_requests": 50,
      "returned_409": 50,
      "rejection_rate_pct": 100.0
    }
  },
  "verdict": "FAIL"
}