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refactor

Refactor code to improve structure and maintainability

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MIT
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2026年10月6日

pydantic_deep/bundled_skills/refactor/SKILL.md

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Refactor

Improve code structure without changing external behavior.

Process

  1. Understand — Read all related code, run existing tests
  2. Plan — Identify what to change and why
  3. Execute — Make changes incrementally
  4. Verify — Run tests after each change

Common Refactoring Patterns

Extract

  • Long function → smaller focused functions
  • Repeated code → shared helper
  • Magic numbers → named constants

Simplify

  • Deep nesting → early returns / guard clauses
  • Complex conditionals → descriptive functions
  • Large classes → smaller focused classes

Rename

  • Unclear names → descriptive names
  • Inconsistent naming → consistent conventions

Reorganize

  • Related functions scattered → grouped in modules
  • Circular dependencies → dependency inversion

Rules

  • Never change behavior — tests must pass before and after
  • One refactoring type per commit
  • If tests don't exist, write them first
  • Don't refactor and add features in the same change

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