// Comprehensive web quality audit covering performance, accessibility, SEO, and best practices. Use when asked to "audit my site", "review web quality", "run lighthouse audit", "check page quality", or "optimize my website".
Optimize for search engine visibility and ranking. Use when asked to "improve SEO", "optimize for search", "fix meta tags", "add structured data", "sitemap optimization", or "search engine optimization".
Apply modern web development best practices for security, compatibility, and code quality. Use when asked to "apply best practices", "security audit", "modernize code", "code quality review", or "check for vulnerabilities".
Optimize web performance for faster loading and better user experience. Use when asked to "speed up my site", "optimize performance", "reduce load time", "fix slow loading", "improve page speed", or "performance audit".
Optimize Core Web Vitals (LCP, INP, CLS) for better page experience and search ranking. Use when asked to "improve Core Web Vitals", "fix LCP", "reduce CLS", "optimize INP", "page experience optimization", or "fix layout shifts".
Audit and improve web accessibility following WCAG 2.2 guidelines. Use when asked to "improve accessibility", "a11y audit", "WCAG compliance", "screen reader support", "keyboard navigation", or "make accessible".
| name | web-quality-audit |
| description | Comprehensive web quality audit covering performance, accessibility, SEO, and best practices. Use when asked to "audit my site", "review web quality", "run lighthouse audit", "check page quality", or "optimize my website". |
| license | MIT |
| metadata | {"author":"web-quality-skills","version":"1.0"} |
Comprehensive quality review based on Google Lighthouse audits. Covers Performance, Accessibility, SEO, and Best Practices across 150+ checks.
Lighthouse v13 note (Oct 2025+). Lighthouse has migrated the Performance category from per-opportunity audits to Performance Insight Audits (announcement). Several individual audit names this skill historically referenced — First Meaningful Paint, No Document Write, Uses Passive Event Listeners, Uses Rel Preload — have been removed or merged. The underlying advice is unchanged and still applies; only the report format moved. The CLS-related audits ("layout shifts", "non-composited animations", "unsized images") are now consolidated into a single
cls-culprits-insight, and image audits are merged intoimage-delivery-insight. Treat older Lighthouse JSON output as a superset, not a contradiction.
Core Web Vitals — Must pass for good page experience:
Resource Optimization:
srcset.@import.font-display: swap. Preload critical fonts. Subset to needed characters.Loading Strategy:
<link rel="preconnect"> for third-party domains.Perceivable:
<img> has meaningful alt text. Decorative images use alt="".Operable:
Understandable:
lang attribute on <html>.Robust:
Crawlability:
On-Page SEO:
<h1>. Logical heading structure.Technical SEO:
Security:
Modern Standards:
document.write, synchronous XHR, etc.<!DOCTYPE html>.<meta charset="UTF-8"> as first element in <head>.UX Patterns:
| Level | Description | Action |
|---|---|---|
| Critical | Security vulnerabilities, complete failures | Fix immediately |
| High | Core Web Vitals failures, major a11y barriers | Fix before launch |
| Medium | Performance opportunities, SEO improvements | Fix within sprint |
| Low | Minor optimizations, code quality | Fix when convenient |
When performing an audit, structure findings as:
## Audit results
### Critical issues (X found)
- **[Category]** Issue description. File: `path/to/file.js:123`
- **Impact:** Why this matters
- **Fix:** Specific code change or recommendation
### High priority (X found)
...
### Summary
- Performance: X issues (Y critical)
- Accessibility: X issues (Y critical)
- SEO: X issues
- Best Practices: X issues
### Recommended priority
1. First fix this because...
2. Then address...
3. Finally optimize...
For detailed guidelines on specific areas: