performance-optimization
Performance Optimization
Diagnose web performance issues and produce a remediation plan. Stack-agnostic. Anchored to Core Web Vitals and standard browser performance patterns.
This skill goes deeper than the performance checks in qa-testing and seo-technical. Use this when performance itself is the goal.
When to use
- Fixing Core Web Vitals (LCP, INP, CLS)
- Diagnosing slow page loads
- Reducing JavaScript bundle size
- Optimizing images, fonts, and other assets
- Fixing layout shift, render-blocking resources, jank
- Pre-launch performance verification
- Annual performance health check
When NOT to use
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