[Guisardo]

Summary

Updates SPEC.md to reflect the current implementation state. All code review findings from the original spec have been resolved.

Changes

• SPEC.md: Complete rewrite to match actual implementation
  • All 12 code review findings marked as resolved ✅
  • All 9 follow-up work items marked as complete ✅
  • Level name mismatch resolved (canonical wenyan)
  • Unit tests for index.ts documented (13 tests)
  • Wenyan levels decision documented (maintain 3 levels)
  • Single source of truth for level enum documented

Resolved Issues

• Issue fix: align wenyan level name across all 4 locations (wenyan vs wenyan-full) #53: Align wenyan level name across all locations
• Issue refactor: strengthen storage type narrowing for defaultLevel #54: Strengthen storage type narrowing with Zod
• Issue chore: remove unnecessary async from server() v1 entrypoint #55: Remove async from server()
• Issue refactor: reduce or remove unused Wenyan intensity levels (speculative generality) #57: Decision to maintain 3 Wenyan levels (not speculative generality)
• Issue refactor: centralize level enum handling - single source of truth for all docs #58: Centralize level enum handling
• Issue refactor: strengthen storage type narrowing with Zod schema validation (fix #54) #62: Strengthen storage narrowing with Zod schema validation
• Issue refactor: extract shared frontmatter parsing utility to eliminate duplication #64: Extract shared frontmatter parsing utility

Testing

• All 42 tests pass (npm test)
• TypeScript strict mode passes (npm run typecheck)