- Rename 'Guide On CLAUDE.md' folder to 'guides/'
- Move CHANGELOG.md to root (was in Official Claude Releases/)
- Delete 'Official Claude Releases' folder
- Add agents/ directory with 100+ subagent definitions
- Add new guide sections: testing/, typescript/, security/
- Update zebbern CLAUDE.md with 2026 best practices
- Update sync workflow to target root CHANGELOG.md