groups:
  - name: proxy-pool
    rules:
      - alert: ProxyPoolGatewayHighErrorRate
        expr: |
          sum(rate(proxy_pool_gateway_requests_total{result="error"}[5m]))
          / clamp_min(sum(rate(proxy_pool_gateway_requests_total[5m])), 1) > 0.02
        for: 10m
        labels:
          severity: warning
        annotations:
          summary: Gateway 错误率持续高于 2%
      - alert: ProxyPoolGatewaySnapshotStale
        expr: proxy_pool_snapshot_age_seconds > 60
        for: 2m
        labels:
          severity: critical
        annotations:
          summary: Gateway Snapshot 已超过安全陈旧时间
      - alert: ProxyPoolNoAvailableSlots
        expr: sum(proxy_pool_available_slots) == 0
        for: 1m
        labels:
          severity: critical
        annotations:
          summary: Gateway 可分配容量耗尽
      - alert: ProxyPoolProviderFetchErrors
        expr: sum by (upstream) (rate(proxy_pool_provider_fetch_total{result="error"}[10m])) > 0.2
        for: 10m
        labels:
          severity: warning
        annotations:
          summary: Provider Fetch 错误持续发生
      - alert: ProxyPoolExtractionConflict
        expr: sum(rate(proxy_pool_extraction_total{result="conflict"}[5m])) > 0
        for: 5m
        labels:
          severity: warning
        annotations:
          summary: 独占提取发生持续事务冲突