accessibility
Installation
SKILL.md
Web Accessibility
Accessibility is a quality attribute, not a feature to bolt on at the end. Consider it from the first line of markup. Legislation in most jurisdictions (ADA, EAA, Section 508, EN 301 549) requires digital products to be accessible.
WCAG principles: POUR
The Web Content Accessibility Guidelines organize all success criteria under four principles. Every accessibility requirement maps to at least one.
| Principle | Question it answers | Examples |
|---|---|---|
| Perceivable | Can users sense the content? | Text alternatives for images, captions for video, sufficient color contrast, resizable text |
| Operable | Can users interact with every control? | Keyboard operability, enough time to complete tasks, no seizure-triggering animations, clear navigation |
| Understandable | Can users comprehend the content and UI behavior? | Readable language, predictable navigation, input assistance and error messages |
| Robust | Does it work across assistive technologies? | Valid markup, proper use of ARIA, compatibility with screen readers and other tools |