- Add .docs-index.json machine-readable index (73 docs)
- Add YAML frontmatter to all documentation files
- Add README.md to each folder with table of contents
- Update CLAUDE.md with metadata schema documentation
- Removed all Day X Exercise training activities
- Removed training-focused language from foreword
- Renamed from Client_Portal_Training_Guide to Client_Portal_Guide
- Now serves as reference documentation, not training curriculum