Patterns

This part of the guide turns corpus evidence into engineering practice: concrete markup, naming, and structure patterns that serve screen reader users and AI agents from the same code.

Planned chapters, in corpus-dependency order:

• Semantic structure for two audiences
• Accessible names as machine contracts
• Forms agents can fill
• llms.txt and markdown mirrors (agent-only aids and the people-first rule that governs them)
• Anti-patterns: div soup, ARIA abuse, overlay widgets

A pattern enters this part only when it can cite a replicated corpus experiment or an established external study. Until then it lives in a chapter draft labeled as hypothesis.