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performance-and-web-vitals

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Lighthouse audits and Core Web Vitals — LCP, CLS, INP. Use when optimising page load, layout shift, input delay, images, fonts or render-blocking resources.

skills/performance-and-web-vitals/SKILL.md

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# Performance and Web Vitals

## Run a Lighthouse Audit

```bash
# CLI audit — outputs JSON and HTML report
npx lighthouse https://example.com --output html --output-path ./lighthouse-report.html

# Headless, useful in CI
npx lighthouse https://example.com --chrome-flags="--headless" --output json --output-path ./report.json

# Audit specific categories only
npx lighthouse https://example.com --only-categories=performance,accessibility,seo
```
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