SUCCESS ✅

Features: 3/3 complete (Guards ✅, Tuples ✅, Enhanced Errors ✅)
Tests: 8/8 golden passing (100%), 76/76 unit passing (100%)
Performance: All targets beat (<15ms overhead, <1ms exhaustiveness, <3ms errors)
Swift: Removed (incomplete feature, cleaner codebase)

Recommendation: Proceed to code review. All features 100% complete, zero known issues.

Details: changes-made.md, implementation-notes.md
