Monitoring and alerting design reviewer for production backend services. ALWAYS use when writing Prometheus alerting rules, designing Grafana dashboards, defining SLI/SLO, configuring alert routing (PagerDuty/OpsGenie/Slack), or reviewing existing monitoring setups. Covers SLI/SLO definition, alert rule quality (sensitivity/specificity tradeoff), burn-rate alerting, alert fatigue prevention, dashboard design principles, label cardinality management, and on-call routing configuration. Use even for "just add an alert" — a poorly designed alert either pages at 3AM for non-issues (alert fatigue) or stays silent during real outages (false confidence).
