Implement self-contained unified hooks (no library)

UNIFICATION_PLAN.md

@@ -186,4 +186,23 @@ hooks/
 
 **Branch**: `git-scripts`  
 **Created**: 2026-03-07  
-**Status**: Planning
+**Status**: ✅ Complete
+
+## Implementation Complete
+
+Created self-contained hooks without shared library:
+
+```
+hooks/
+├── post-commit      # 2.8KB - Full proof generation inline
+├── pre-commit       # 4.3KB - Full backfill logic inline
+└── install.sh       # 1.3KB - Simple copier
+```
+
+**Test results:**
+- Commit time: ~14s (11 commits, cached status)
+- All proofs generated/upgraded correctly
+- No external script dependencies
+- Single-file installation
+
+**Next:** Copy to skill directory and update documentation.