Accessibility

Accessible web interfaces are mandatory -- legally, ethically, and commercially.

Scope

Use this skill when: You are auditing HTML structure and semantics, setting ARIA attributes, implementing keyboard navigation, checking contrasts, designing accessible forms, making media accessible, ensuring BFSG compliance, or auditing existing interfaces for accessibility.

Principles

1. Accessibility Is a Baseline Requirement -- Not a Special Feature

Accessible design benefits EVERYONE. Situational limitations (sunlight, noisy environments, one hand occupied) affect everyone.

2. From the Start -- Not Retrofitted

Retrofitting is 10x more expensive and 10x worse. Accessibility belongs in every phase: concept, design, development, testing.

3. The Four POUR Principles Are Mandatory

Perceivable, Operable, Understandable, Robust.