{
  "id": "com.example.packet-counter",
  "name": "Packet Counter",
  "version": "1.0.0",
  "domain_api": 1,
  "publisher": "Example",
  "sampled_state": {
    "rate_hz": 20,
    "channels": [
      {"name": "packets.completed", "symbol": "packets_completed", "ty": "u32", "counter": "wrapping"},
      {"name": "packets.errors", "symbol": "packet_errors", "ty": "u32", "counter": "wrapping"}
    ]
  },
  "derived": [
    {"type": "rate", "name": "packets.rate", "source": "packets.completed", "unit": "packets/s"}
  ],
  "channels": [
    {"match": {"ns": "poll", "name_prefix": "packets."}, "display": "counter", "unit": "packets", "interpolation": "step"},
    {"match": {"ns": "derived", "name": "packets.rate"}, "display": "graph", "unit": "packets/s", "graph": true}
  ],
  "verdicts": [
    {"id": "packet-errors", "name": "Packet errors increased", "severity": "warning",
     "when": {"type": "counter_advanced", "channel": "packets.errors"},
     "explain": "The firmware error counter advanced. Inspect the driver's error reason and compare with traffic load.",
     "evidence": ["packets.errors", "packets.rate"]}
  ],
  "presentation": {
    "sections": [
      {"title": "Packets", "view": "cards", "fields": [
        {"channel": "packets.completed", "label": "Completed", "unit": "packets"},
        {"channel": "packets.errors", "label": "Errors", "unit": "packets"},
        {"channel": "packets.rate", "label": "Throughput", "unit": "packets/s"}
      ], "checks": ["packet-errors"]}
    ]
  }
}