Agent skill · data analytics · davila7
web-quality-audit
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".
Why this skill is useful
Provides specific actionable recommendations and code examples for optimizing web performance, accessibility, and SEO that the AI wouldn't reliably generate on its own.
What it needs
About 4k tokens when loaded. Last updated 2026-08-06. 30,138 stars on the source repository.
What this skill does
Web quality audit Comprehensive quality review based on Google Lighthouse audits. Covers Performance, Accessibility, SEO, and Best Practices across 150+ checks. How it works 1. Analyze the provided code/project for quality issues 2. Categorize findings by severity (Critical, High, Medium, Low) 3. Provide specific, actionable recommendations 4. Include code examples for fixes Audit categories Performance (40% of typical issues) Core Web Vitals — Must pass for good page experience: LCP (Largest Contentful Paint) < 2.5s. The largest visible element must render quickly. Optimize images, fonts, and server response time. INP (Interaction to Next Paint) < 200ms. User interactions must feel instant. Reduce JavaScript execution time and break up long tasks. CLS (Cumulative Layout Shift) < 0.1. Content must not jump around. Set explicit dimensions on images, embeds, and ads. Resource Optimization: Compress images. Use WebP/AVIF with fallbacks. Serve correctly sized images via srcset. Minimize JavaScript. Remove unused code. Use code splitting. Defer non-critical scripts. Optimize CSS. Extract critical CSS. Remove unused styles. Avoid @import. Efficient fonts. Use font-display: swap. Preload critical fonts. Subset to needed characters. Loading Strategy: Preconnect to origins. Add <link rel="preconnect"> for third-party domains. Preload critical assets. LCP images, fonts, and above-fold CSS. Lazy load below-fold content. Images, iframes, and heavy components. Cache effectively. Long cache TTLs for static assets. Immutable caching for hashed files. Accessibility (30% of typical issues) Perceivable: Text alternatives. Every <img> has meaningful alt text. Decorative images use alt="". Color contrast. Minimum 4.5:1 for normal text, 3:1 for large text (WCAG AA). Don't rely on color alone. Use icons, patterns, or text alongside color indicators. Captions and transcripts. Video has captions. Audio has transcripts. Operable: Keyboard accessible. …
How to use it
Reference it in AdaL, Claude Code, Cursor or any coding agent — nothing to install:
@skills davila7/web-quality-audit