# core-web-vitals

Agent skill by Addy Osmani (https://addyosmani.com)

Diagnose and repair page-experience regressions using real measurement rather than a guess about what got slow.

Topics: Performance
Last updated: 2026-08-24 (22 days ago)
Source: https://github.com/addyosmani/web-quality-skills
Repository: https://github.com/addyosmani/web-quality-skills

## Install

```bash
npx skills add https://github.com/addyosmani/web-quality-skills --skill core-web-vitals
```

## In the author's words

Optimize Core Web Vitals (LCP, INP, CLS) for better page experience using field and lab evidence. Use when asked to "improve Core Web Vitals", "fix LCP", "reduce CLS", "optimize INP", "page experience optimization", or "fix layout shifts".

## Verification

- Source link: Resolved (HTTP 200) (pass)
- Repository: Resolves on GitHub (pass)
- Install command: Transcribed from the author's own page (pass)
- Maintenance: Last updated 22 days ago (pass)
- Attribution: Credited to Addy Osmani (pass)

Full page: https://stackskills.dev/library/core-web-vitals