Playbook for product accessibility — WCAG 2.2 AA, ADA Title III (US public accommodations), Section 508 (US federal), EN 301 549 (EU), accessibility-first UX patterns, accessibility testing.
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What the file says
# Accessibility — product-side playbook
Accessibility is product, not legal. The product is more usable for
everyone when designed accessible-first. Legally, ADA Title III lawsuits
have grown rapidly (Domino's, Target, etc.); Section 508 gates federal
sales; EU EN 301 549 + Accessibility Act apply to EU consumer products
from 2025. The market case: ~15% of people have a disability.
## 1. WCAG 2.2 AA — the current standard
W3C Web Content Accessibility Guidelines. The most-referenced standard.
**Four principles (POUR):**
- **Perceivable**: info presented in ways user can perceive (alt text,
captions, contrast).
- **Operable**: UI usable via keyboard, touch, voice.
- **Understandable**: text + interaction predictable.
- **Robust**: works with assistive tech.
**Levels**: A (basics) / AA (industry standard) / AAA (high bar).
Target: **AA** for most products.
**WCAG 2.2 adds:**
- Focus indicators must be visible (no more invisible focus rings).
- Click targets ≥ 24×24 px (touch targets often ≥ 44×44).
- Dragging gestures need single-pointer alternatives.
- Authentication can't require cognitive test (memorization).
- Help available consistently.
## 2. US legal frame
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The line at the top of this page pins the label git:20260721.86de099, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
GET https://markdownregistry.com/api/v1/artifacts/art_rijl3sud23muedqk
GET https://markdownregistry.com/api/v1/resolve?ref=vandanaajaydubey111/great-pm/accessibility
GET https://markdownregistry.com/api/v1/blob/c086b6c64960cbd6417ee9076c8d181febf7e13ed6bf0e6fb4ff8b26d90f9f91
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
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