{
  "schemaVersion": 39,
  "title": "Policy Pipeline",
  "panels": [
    {
      "type": "stat",
      "title": "Compile p99 (s)",
      "datasource": "Prometheus",
      "fieldConfig": {"defaults": {"unit": "s", "decimals": 2}},
      "targets": [
        {"expr": "histogram_quantile(0.99, sum(rate(policy_compile_duration_seconds_bucket[5m])) by (le))"}
      ]
    },
    {
      "type": "timeseries",
      "title": "Compile Duration (p95/p50)",
      "datasource": "Prometheus",
      "fieldConfig": {"defaults": {"unit": "s", "decimals": 2}},
      "targets": [
        {"expr": "histogram_quantile(0.95, sum(rate(policy_compile_duration_seconds_bucket[5m])) by (le))", "legendFormat": "p95"},
        {"expr": "histogram_quantile(0.50, sum(rate(policy_compile_duration_seconds_bucket[5m])) by (le))", "legendFormat": "p50"}
      ]
    },
    {
      "type": "stat",
      "title": "Simulation Queue Depth",
      "datasource": "Prometheus",
      "fieldConfig": {"defaults": {"unit": "none"}},
      "targets": [{"expr": "sum(policy_simulation_queue_depth)"}]
    },
    {
      "type": "timeseries",
      "title": "Queue Depth by Stage",
      "datasource": "Prometheus",
      "targets": [{"expr": "policy_simulation_queue_depth", "legendFormat": "{{stage}}"}],
      "fieldConfig": {"defaults": {"unit": "none"}}
    },
    {
      "type": "stat",
      "title": "Approval p95 (s)",
      "datasource": "Prometheus",
      "fieldConfig": {"defaults": {"unit": "s", "decimals": 1}},
      "targets": [
        {"expr": "histogram_quantile(0.95, sum(rate(policy_approval_latency_seconds_bucket[5m])) by (le))"}
      ]
    },
    {
      "type": "timeseries",
      "title": "Approval Latency",
      "datasource": "Prometheus",
      "fieldConfig": {"defaults": {"unit": "s", "decimals": 1}},
      "targets": [
        {"expr": "histogram_quantile(0.90, sum(rate(policy_approval_latency_seconds_bucket[5m])) by (le))", "legendFormat": "p90"},
        {"expr": "histogram_quantile(0.50, sum(rate(policy_approval_latency_seconds_bucket[5m])) by (le))", "legendFormat": "p50"}
      ]
    },
    {
      "type": "gauge",
      "title": "Promotion Success Rate (30m)",
      "datasource": "Prometheus",
      "fieldConfig": {"defaults": {"unit": "percent", "min": 0, "max": 100}},
      "options": {"reduceOptions": {"calcs": ["last"]}, "orientation": "horizontal"},
      "targets": [
        {"expr": "100 * clamp_min(rate(policy_promotion_outcomes_total{outcome=\"success\"}[30m]),0) / clamp_min(rate(policy_promotion_outcomes_total[30m]),1)"}
      ]
    },
    {
      "type": "barchart",
      "title": "Promotion Outcomes",
      "datasource": "Prometheus",
      "fieldConfig": {"defaults": {"unit": "1/s"}},
      "options": {"displayMode": "series"},
      "targets": [
        {"expr": "rate(policy_promotion_outcomes_total[5m])", "legendFormat": "{{outcome}}"}
      ]
    }
  ]
}