Accessibility MCP Server

# Accessibility Rules ## WCAG Compliance - **WCAG references mandatory**: Every rule result must include at least one WCAG reference in `wcag_ref` array - **Format**: WCAG references must follow format `WCAG2.1:X.Y.Z` or `WCAG2.2:X.Y.Z` - **Mapping**: Use `src/utils/wcag.ts` for rule ID to WCAG criterion mapping ## Severity Classification - **Severity = impact + confidence**: Severity must reflect both the impact level and confidence in the finding - **Impact levels**: critical, serious, moderate, minor - **Confidence levels**: high, medium, low - **Mapping**: Use `mapImpactToSeverity()` and `getConfidenceFromImpact()` utilities ## Violation Requirements - **Selector required**: All violations must include a `selector` field with the CSS selector or XPath - **DOM context required**: All violations must include `dom_context` field with relevant HTML snippet (max 200 chars) - **No prose-only findings**: All findings must be machine-actionable with selector and DOM context ## Rule Identification - **Rule ID format**: Must match tool-specific rule identifiers (e.g., axe rule IDs, Lighthouse audit IDs, WAVE error codes) - **Consistent mapping**: Same rule across tools should map to same WCAG criteria