Is the Web Quality Audit skill free?

Yes. The skill itself is free from addyosmani/web-quality-skills. SkillProof publishes the install command and an independent test verdict at no cost.

What is the Web Quality Audit SkillProof Score?

9.6/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 9/10, docs & honesty 5/5.

How do I install Web Quality Audit?

Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.

Can I use Web Quality Audit with Cursor, Copilot, Gemini CLI, Codex or other AI tools?

The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.

Web Quality Audit

Lighthouse-style audit across Performance, Accessibility, SEO, and Best Practices with severity tiers.

by addyosmani · addyosmani/web-quality-skills

Tested · Works

Install — copy the command Download source ↗

Test report

Verdict: Tested · Works
Score: 9.6/10
Tested: Jul 10, 2026
Environment: Claude Code 2.x (agent harness)
Upstream re-checked: Jul 18, 2026 · 2fbbb02

Auditing a deliberately broken test page, it caught the charset and mixed-content issues a flat review missed, tagging every finding with file:line and a concrete fix instead of a bare list.

Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works

Installs cleanly 5/5
Triggers reliably 5/5
Output vs. baseline 9/10
Docs & honesty 5/5

What Web Quality Audit does

Web Quality Audit reviews a page or project against ~150 Lighthouse-derived checks spanning Core Web Vitals, WCAG accessibility, on-page/technical SEO, and security/modern-standards best practices, then outputs a severity-tiered (Critical/High/Medium/Low) report with file-level fixes and a prioritized action list. Trigger with "audit my site", "run lighthouse audit", "check page quality", or "optimize my website".

How to install Web Quality Audit

git clone https://github.com/addyosmani/web-quality-skills
cd web-quality-skills
mkdir -p ~/.claude/skills
cp -r skills/web-quality-audit ~/.claude/skills/web-quality-audit

Skills live in ~/.claude/skills/ (global) or .claude/skills/ (per-project). Restart Claude Code after installing.

Commands — how to trigger Web Quality Audit

/web-quality-audit Lighthouse-style audit across Performance, Accessibility, SEO, and Best Practices with severity tiers.

It also activates on plain-language prompts like these:

Run a Lighthouse-style audit on my site for performance and SEO
Check my page for accessibility and Core Web Vitals issues
Audit my website and give me a prioritized severity fix list

Frequently asked questions

Is the Web Quality Audit skill free?: Yes. The skill itself is free from addyosmani/web-quality-skills. SkillProof publishes the install command and an independent test verdict at no cost.
Does Web Quality Audit work with Claude Code?: We tested it with Claude Code 2.x (agent harness) on Jul 10, 2026. Verdict: Tested · Works. Auditing a deliberately broken test page, it caught the charset and mixed-content issues a flat review missed, tagging every finding with file:line and a concrete fix instead of a bare list.
What is the Web Quality Audit SkillProof Score?: 9.6/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 9/10, docs & honesty 5/5.
How do I install Web Quality Audit?: Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
Can I use Web Quality Audit with Cursor, Copilot, Gemini CLI, Codex or other AI tools?: The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.