After TDD cycle, look for: - **Duplication** → Extract function/class - **Long methods** → Break into private helpers (keep tests on public interface) - **Shallow modules** → Combine or deepen - **Feature envy** → Move logic to where data lives - **Primitive obsession** → Introduce value objects - **Existing code** the new code reveals as problematic
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# Refactor Candidates
After TDD cycle, look for:
- **Duplication** → Extract function/class
- **Long methods** → Break into private helpers (keep tests on public interface)
- **Shallow modules** → Combine or deepen
- **Feature envy** → Move logic to where data lives
- **Primitive obsession** → Introduce value objects
- **Existing code** the new code reveals as problematic
