Last commit on August 24, 2026·Created on January 18, 2026
addyosmani/web-quality-skills
“Audit web performance, accessibility, and SEO.”
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TL;DR
This collection provides structured guidance for frontend engineers and accessibility specialists to improve the quality of web interfaces. It focuses on measurable standards, from WCAG 2.2 compliance and screen reader support to the optimization of Core Web Vitals.
By applying these skills, developers can systematically address page experience issues like LCP and CLS while ensuring sites are discoverable through structured data and search engine optimization.
WHO IT'S FOR
Frontend engineers
optimizing Core Web Vitals and page speed
Accessibility specialists
auditing sites for WCAG 2.2 compliance
Web performance engineers
reducing load times and fixing slow loading
Technical leads
enforcing security and code quality standards
Compatible AgentsThe repository documents support for these agents. The skills may also work with other agents that can load SKILL.md files, but they may need some setup or small changes.
Claude
Codex
Cursor
Gemini CLI
OpenCodeWant to install it?
Claude Marketplace · Claude Plugin · Clone to Claude · Manual Copy · NPX Skills AddRepository instructions