monitoring-observability

Production observability and monitoring expertise including structured logging with JSON and correlation IDs, Prometheus metrics (counters, histograms, gauges), distributed tracing with OpenTelemetry and Jaeger, Grafana dashboard design, SLO/SLI-based alerting rules, Sentry error tracking, health check endpoints, readiness vs liveness probes, and on-call runbook patterns. Use when setting up monitoring, debugging production issues, designing dashboards, or implementing observability in Go, Node.js, or Python services.