Markdown Accessibility

This is a comprehensive rule library for fixing accessibility problems in markdown documentation. It covers nine domains including ambiguous link text, missing image alt text, heading hierarchy issues, and emoji handling with four configurable modes (remove all, remove decorative, translate to English, or leave unchanged). The emoji translation map alone includes over 50 common symbols. It includes severity scoring that weights critical issues like missing alt text at 15 points and minor issues like bare URLs at 1 point, then outputs letter grades. The pattern library provides detection rules and auto-fix templates for Mermaid and ASCII diagrams, plus GitHub anchor validation logic. Use this when you need consistent accessibility auditing across documentation or want to automate markdown remediation with WCAG 2.4.4 and 1.1.1 compliance built in.