[
  {
    "description": "Healthy cluster with good performance",
    "message": {
      "type": "backbeat.barreport.v1",
      "window_id": "7e9b0e6c4c9a4e59b7f2d9a3c1b2e4d5",
      "from_beat": 240,
      "to_beat": 359,
      "agents_reporting": 978,
      "on_time_reviews": 942,
      "help_promises_fulfilled": 87,
      "secret_rotations_ok": true,
      "tempo_drift_ms": 7.3,
      "issues": [
        {
          "severity": "warning",
          "category": "timing",
          "count": 12,
          "description": "Some agents consistently reporting 50ms+ late",
          "affected_agents": ["worker:batch-03", "indexer:shard-7"],
          "first_seen_beat": 245,
          "last_seen_beat": 358
        }
      ],
      "performance": {
        "avg_response_time_ms": 45.2,
        "p95_response_time_ms": 125.7,
        "total_tasks_completed": 15678,
        "total_tasks_failed": 23,
        "peak_concurrent_agents": 1203,
        "network_bytes_transferred": 67890123
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      "health_indicators": {
        "cluster_sync_score": 0.94,
        "resource_utilization": 0.67,
        "collaboration_efficiency": 0.89,
        "error_rate": 0.001
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    }
  },
  {
    "description": "Small development cluster with perfect sync",
    "message": {
      "type": "backbeat.barreport.v1",
      "window_id": "a1b2c3d4e5f6789012345678901234ab",
      "from_beat": 0,
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      "agents_reporting": 5,
      "on_time_reviews": 5,
      "help_promises_fulfilled": 2,
      "secret_rotations_ok": true,
      "tempo_drift_ms": -0.1,
      "issues": []
    }
  },
  {
    "description": "Cluster with multiple serious issues",
    "message": {
      "type": "backbeat.barreport.v1",
      "window_id": "fedcba9876543210fedcba9876543210",
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      "to_beat": 1319,
      "agents_reporting": 450,
      "on_time_reviews": 380,
      "help_promises_fulfilled": 15,
      "secret_rotations_ok": false,
      "tempo_drift_ms": 125.7,
      "issues": [
        {
          "severity": "critical",
          "category": "credential_failure",
          "count": 3,
          "description": "Failed to rotate database credentials",
          "affected_agents": ["db-manager:primary", "backup:secondary"],
          "first_seen_beat": 1205,
          "last_seen_beat": 1318
        },
        {
          "severity": "error",
          "category": "network_partition",
          "count": 1,
          "description": "Lost connection to east coast data center",
          "affected_agents": ["worker:east-01", "worker:east-02", "worker:east-03"],
          "first_seen_beat": 1210,
          "last_seen_beat": 1319
        },
        {
          "severity": "warning",
          "category": "resource_exhaustion",
          "count": 45,
          "description": "High memory usage detected",
          "affected_agents": ["ml-trainer:gpu-01"],
          "first_seen_beat": 1200,
          "last_seen_beat": 1315
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      ],
      "performance": {
        "avg_response_time_ms": 180.5,
        "p95_response_time_ms": 450.0,
        "total_tasks_completed": 5432,
        "total_tasks_failed": 123,
        "peak_concurrent_agents": 487,
        "network_bytes_transferred": 23456789
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      "health_indicators": {
        "cluster_sync_score": 0.72,
        "resource_utilization": 0.95,
        "collaboration_efficiency": 0.45,
        "error_rate": 0.022
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    }
  },
  {
    "description": "High-frequency cluster report (8 BPM tempo)",
    "message": {
      "type": "backbeat.barreport.v1",
      "window_id": "0123456789abcdef0123456789abcdef",
      "from_beat": 960,
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      "agents_reporting": 2000,
      "on_time_reviews": 1985,
      "help_promises_fulfilled": 156,
      "secret_rotations_ok": true,
      "tempo_drift_ms": 3.2,
      "issues": [
        {
          "severity": "info",
          "category": "timing",
          "count": 15,
          "description": "Minor timing variations detected",
          "first_seen_beat": 965,
          "last_seen_beat": 1078
        }
      ],
      "performance": {
        "avg_response_time_ms": 25.1,
        "p95_response_time_ms": 67.3,
        "total_tasks_completed": 45678,
        "total_tasks_failed": 12,
        "peak_concurrent_agents": 2100,
        "network_bytes_transferred": 123456789
      },
      "health_indicators": {
        "cluster_sync_score": 0.98,
        "resource_utilization": 0.78,
        "collaboration_efficiency": 0.92,
        "error_rate": 0.0003
      },
      "metadata": {
        "reverb_version": "1.3.0",
        "report_generation_time_ms": 45.7,
        "next_window_id": "fedcba0987654321fedcba0987654321"
      }
    }
  },
  {
    "description": "Minimal valid bar report (only required fields)",
    "message": {
      "type": "backbeat.barreport.v1",
      "window_id": "1111222233334444555566667777888",
      "from_beat": 600,
      "to_beat": 719,
      "agents_reporting": 1,
      "on_time_reviews": 1,
      "help_promises_fulfilled": 0,
      "secret_rotations_ok": true,
      "tempo_drift_ms": 0.0
    }
  },
  {
    "description": "Empty issues array (valid)",
    "message": {
      "type": "backbeat.barreport.v1",
      "window_id": "9999aaaa0000bbbb1111cccc2222dddd",
      "from_beat": 480,
      "to_beat": 599,
      "agents_reporting": 100,
      "on_time_reviews": 98,
      "help_promises_fulfilled": 25,
      "secret_rotations_ok": true,
      "tempo_drift_ms": -1.5,
      "issues": [],
      "performance": {
        "avg_response_time_ms": 50.0,
        "total_tasks_completed": 1000,
        "total_tasks_failed": 2
      }
    }
  }
]