API Monitoring Skill Design complete observability stacks for any API: health checks, metrics, alerting, and dashboards. --- Health Check Endpoints Liveness check — is the process alive? Readiness check — can it serve traffic? Deep health — full dependency tree --- SLI / SLO / SLA Definitions | Metric | SLI (what to measure) | SLO (target) | SLA (committed) | |--------|-----------------------|--------------|-----------------| | Availability | % of successful requests | 99.95% | 99.9% | | Latency | p99 response time | < 500ms | < 1000ms | | Error rate | % 5xx responses | < 0.1% | < 0.5% | | Th…