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web-quality-skills

v2.0.0

Measurement-first Agent Skills for Lighthouse, Chrome DevTools, Core Web Vitals, WCAG 2.2, SEO, and agentic browsing.

Claude Code6 Skills

By Addy OsmaniLicense: MIT2.9k GitHub starsUpdated last month

Directory evidence

Runtimes
Claude Code
Parsed components
6 skill or MCP entries
Source updated
Aug 24, 2026
Manifest status
Canonical path parsed

The directory validates manifest shape and source location. It does not execute the plugin or provide a security endorsement. Review the indexing methodology →

Install web-quality-skills for Claude Code

Installs for the current user
claude plugin marketplace add IchenDEV/agent-plugin-mkt
claude plugin marketplace update agent-plugin-marketplace
claude plugin install web-quality-skills@agent-plugin-marketplace

Paste and run these commands in a terminal with Claude Code. They add and refresh the PluginsMP catalog, then install this plugin.

The installer fetches third-party code from the source repository shown on this page. This directory validates manifest structure and source location, but does not perform a security audit; review the manifest, components, and source before installing.

Get the source manually
git clone https://github.com/addyosmani/web-quality-skills

Clone the source repository, then follow its setup instructions to add the plugin to a compatible client. The repository root is the plugin root.

Plugin files

web-quality-skills/
├── .claude-plugin/plugin.json
├── skills/accessibility/SKILL.md
├── skills/best-practices/SKILL.md
├── skills/core-web-vitals/SKILL.md
├── skills/performance/SKILL.md
├── skills/seo/SKILL.md
└── skills/web-quality-audit/SKILL.md

Included Skills6

accessibilityskills/accessibility/SKILL.md

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".

best-practicesskills/best-practices/SKILL.md

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".

core-web-vitalsskills/core-web-vitals/SKILL.md

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".

performanceskills/performance/SKILL.md

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".

seoskills/seo/SKILL.md

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".

web-quality-auditskills/web-quality-audit/SKILL.md

Run an evidence-led web quality audit covering performance, accessibility, SEO, best practices, and agentic browsing. Use when asked to "audit my site", "review web quality", "run lighthouse audit", "check page quality", or "optimize my website".

Plugin manifests1

.claude-plugin/plugin.json
{
  "name": "web-quality-skills",
  "description": "Measurement-first Agent Skills for Lighthouse, Chrome DevTools, Core Web Vitals, WCAG 2.2, SEO, and agentic browsing.",
  "version": "2.0.0",
  "author": {
    "name": "Addy Osmani",
    "url": "https://github.com/addyosmani"
  },
  "homepage": "https://github.com/addyosmani/web-quality-skills",
  "repository": "https://github.com/addyosmani/web-quality-skills",
  "license": "MIT"
}

For maintainers

If you maintain this plugin, link to this source-backed listing from your README so users can review its manifest and indexed components.

[web-quality-skills on Agent Plugins Marketplace](https://pluginsmp.com/plugins/web-quality-skills)