{
  "uid": "scrabble-overview",
  "title": "Scrabble — Service overview",
  "tags": ["scrabble"],
  "timezone": "",
  "schemaVersion": 39,
  "version": 1,
  "refresh": "30s",
  "time": { "from": "now-6h", "to": "now" },
  "panels": [
    {
      "type": "stat",
      "title": "Active users (24h)",
      "gridPos": { "h": 5, "w": 6, "x": 0, "y": 0 },
      "datasource": { "type": "prometheus", "uid": "prometheus" },
      "targets": [{ "refId": "A", "expr": "max(active_users{window=\"24h\"})" }]
    },
    {
      "type": "stat",
      "title": "Active users (7d)",
      "gridPos": { "h": 5, "w": 6, "x": 6, "y": 0 },
      "datasource": { "type": "prometheus", "uid": "prometheus" },
      "targets": [{ "refId": "A", "expr": "max(active_users{window=\"7d\"})" }]
    },
    {
      "type": "stat",
      "title": "Edge requests/s",
      "gridPos": { "h": 5, "w": 6, "x": 12, "y": 0 },
      "datasource": { "type": "prometheus", "uid": "prometheus" },
      "targets": [{ "refId": "A", "expr": "sum(rate(edge_request_duration_count[5m]))" }]
    },
    {
      "type": "stat",
      "title": "Edge error ratio",
      "gridPos": { "h": 5, "w": 6, "x": 18, "y": 0 },
      "fieldConfig": { "defaults": { "unit": "percentunit" }, "overrides": [] },
      "datasource": { "type": "prometheus", "uid": "prometheus" },
      "targets": [{ "refId": "A", "expr": "sum(rate(edge_request_duration_count{result!=\"ok\"}[5m])) / clamp_min(sum(rate(edge_request_duration_count[5m])), 1)" }]
    },
    {
      "type": "timeseries",
      "title": "Goroutines by service",
      "description": "OTel Go runtime metric; verify the exact name against live Prometheus if empty (go_goroutine_count / process_runtime_go_goroutines depending on the contrib runtime version).",
      "gridPos": { "h": 8, "w": 12, "x": 0, "y": 5 },
      "datasource": { "type": "prometheus", "uid": "prometheus" },
      "targets": [{ "refId": "A", "expr": "go_goroutine_count", "legendFormat": "{{service_name}}" }]
    },
    {
      "type": "timeseries",
      "title": "Heap memory used by service",
      "description": "OTel Go runtime metric (best-effort name go_memory_used); verify against live Prometheus if empty.",
      "gridPos": { "h": 8, "w": 12, "x": 12, "y": 5 },
      "fieldConfig": { "defaults": { "unit": "bytes" }, "overrides": [] },
      "datasource": { "type": "prometheus", "uid": "prometheus" },
      "targets": [{ "refId": "A", "expr": "sum(go_memory_used) by (service_name)", "legendFormat": "{{service_name}}" }]
    }
  ]
}