Archive roadmap and requirements to milestones/v1.0-*.
Evolve PROJECT.md with validated requirements and decisions.
Reorganize ROADMAP.md with milestone grouping.
Delete REQUIREMENTS.md (fresh for next milestone).
Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)
Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>
