Echo
eba8849986
Completed comprehensive spec-driven documentation: - SPEC.md (222 lines): Project scope, objectives, constraints - ARCHITECTURE.md (290 lines): System design, components, data flow - REQUIREMENTS.md (168 lines): Functional & non-functional requirements - API_SPEC.md (556 lines): 15 API endpoints with schemas - SECURITY.md (188 lines): STRIDE threat model, security controls - ROADMAP.md (203 lines): 5 phases, 8 milestones, risk register Total: 1,627 lines of specification documentation Milestone M1 complete - Ready for Phase 0 (Rust scaffolding)