Refactoring Code

Core principle: Refactoring changes structure, not functionality. If behavior changes, you're rewriting.

Target: If $ARGUMENTS is provided, use it as the refactoring target. Otherwise, check for unstaged changes. If none, diff against main: git diff --name-only $([ "$(git rev-parse --abbrev-ref HEAD)" = "main" ] && echo "HEAD^" || echo "main...HEAD")

The Five Phases

Refactoring Progress:
- [ ] Phase 1: Understand current behavior
- [ ] Phase 2: Verify behavior-driven tests exist
- [ ] Phase 3: Identify issues
- [ ] Phase 4: Plan incremental steps
- [ ] Phase 5: Execute with continuous verification

Phase 1: Understand Current Behavior