Spec-to-Code Coverage Map

Generate a comprehensive coverage map showing the relationship between specifications and implementation files.

When to run: After Gear 6 (Implementation) or during cleanup/documentation phases

Output: docs/spec-coverage-map.md

What This Does

Creates a visual map showing:

1. Spec → Files: Which code files each spec covers
2. Files → Specs: Which spec(s) cover each code file (reverse index)
3. Coverage Statistics: Percentages by category (backend, frontend, infrastructure)
4. Gap Analysis: Code files not covered by any spec
5. Shared Files: Files referenced by multiple specs