This is your go-to when you need to diagnose why your app is slow, set up proper observability, or prepare for scale. It covers the full stack: OpenTelemetry tracing, APM integration with DataDog or New Relic, load testing with k6 or Gatling, and multi-tier caching strategies. The skill walks you through confirming performance goals, collecting actual metrics and traces, proposing optimizations with expected impact, and verifying results. It's opinionated about safety too, requiring approval before load testing production and insisting on staged rollouts. Best for backend bottlenecks, frontend Core Web Vitals optimization, or capacity planning. Skip it if you just need feature work with no performance targets or lack access to profiling data.
npx skills add https://github.com/sickn33/antigravity-awesome-skills --skill performance-engineer