What it is
performance-optimization is a web performance skill from Addy Osmani's agent-skills repository. Its source guidance targets Core Web Vitals, page-load analysis, runtime profiling, and regression prevention.
Why it is useful
Performance fixes are easy to make unmeasurable. This skill pushes the agent toward profiling, identifying bottlenecks, applying scoped fixes, and verifying the result with concrete signals.
Best uses
- Improve load time, responsiveness, and visual stability.
- Investigate a performance regression before changing code.
- Add performance budgets or checks to a frontend workflow.
Notes
Pair it with real measurement tools. A faster-looking local run is not enough evidence for production performance.