Addy Osmani Releases Accessibility Skill for WCAG 2.2

LinkAddy OsmaniTool

Addy Osmani has published an accessibility skill and audit guide aligned with WCAG 2.2 standards and Lighthouse audits. Installable via npx, the skill outlines an evidence-based workflow combining automated checks and manual inspection.

Key points

  1. Installable via 'npx skills add https://github.com/addyosmani/web-quality-skills --skill accessibility'.
  2. Promotes an evidence-led audit process using Lighthouse live audits, Chrome DevTools MCP, accessibility tree snapshots, and keyboard testing.
  3. Organised around the POUR principles (Perceivable, Operable, Understandable, Robust) across A, AA, and AAA levels.
  4. Covers WCAG 2.2 criteria including focus not obscured (2.4.11), target size (2.5.8), dragging movements (2.5.7), redundant entry (3.3.7), and accessible authentication (3.3.8).
  5. Stresses using native semantic HTML elements before reaching for ARIA and reminds developers that a Lighthouse score of 100 does not guarantee full WCAG compliance.

Why it matters

Automated scanning only catches a fraction of accessibility defects. By coupling MCP-enabled browser tooling with actionable guidance for WCAG 2.2 updates, this resource assists developers and AI agents in spotting and remediating real-world accessibility barriers.

Analysis

The skill provides concise, modern snippets covering contrast calculations, focus rings via :focus-visible, sticky header spacing, and accessible login practices. By formatting instructions for tools like Chrome DevTools MCP, it bridges standard web development requirements with agent-assisted auditing workflows.

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Summary generated by AI (Gemini 3.8 Flash, 28 September 2026). It may contain errors – the original source is authoritative.

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