Comprehensively document the new classification system and content control features added in Phase 1. ## Documentation Updates ### New Content Added **1. Updated MarkiTect Extensions Section** - Replaced deprecated x-markitect-required/recommended-sections - Documented x-markitect-sections with five classification levels - Documented x-markitect-content-control for content validation **2. Added Section Classification System (150+ lines)** - Detailed explanation of all five classification levels: - required: Missing = ERROR - recommended: Missing = WARNING - optional: No validation impact - discouraged: Present = WARNING - improper: Present = ERROR - Validation behavior for each classification - JSON examples for each level **3. Added Content Control Documentation** - Pattern validation (required/discouraged/forbidden) - Content quality metrics (word count, readability targets) - Content instructions for authors - Complete examples with explanations **4. Updated Schema Design Best Practices** - Replaced old extension examples with new classification system - Added guidance on choosing appropriate classifications - Examples showing required, recommended, optional, discouraged, improper **5. Added Classification System Example** - Complete working schema demonstrating all features - Validation scenarios showing different outcomes - Integration of sections and content-control extensions ## Changes Summary **Lines Added**: ~200 lines of new documentation **Sections Updated**: 4 major sections **Examples Added**: 8 new code examples **Key Topics Covered**: - Five-level classification system (required → improper) - Content pattern validation - Quality metrics and readability targets - Content instructions for document authors - Validation behavior for each classification - Complete working examples ## Validation ✅ Manual validates against improved markdown-manpage-schema.json ✅ All new features documented with examples ✅ Backward compatibility maintained ✅ Self-documenting: manual uses the features it documents The manual now comprehensively documents the Phase 1 enhanced schema system while itself validating against a schema using those features. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>