# Refactor

> Use when refactoring code to improve structure, reduce duplication, and apply SRP/DRY principles without changing behavior.

- Skill: `whchoi98/refactor` (Agent Skill)
- Install (CLI): `npx skillmds@latest add whchoi98/refactor`
- Raw SKILL.md: https://api.skillmd.com/api/skills/whchoi98/refactor/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: whchoi98 (https://skillmd.com/u/whchoi98)
- Updated: 2026-09-22
- Page: https://skillmd.com/skills/whchoi98/refactor

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# Refactor Skill

Refactor existing code to improve quality without changing behavior.

## Principles
- Improve structure without changing behavior
- Single Responsibility Principle (SRP)
- Remove duplicate code (DRY)
- Small, incremental steps with verification

## Process

### 1. Analysis
- Identify the target code and its tests
- Map all callers and dependencies
- Confirm test coverage exists (suggest adding tests first if not)

### 2. Plan
Present the refactoring plan to the user:
- What will change
- What will NOT change (behavior preservation)
- Risk assessment (low/medium/high)

### 3. Execute
- Make changes in small, verifiable steps
- Run tests after each step if possible
- Keep commits atomic

### 4. Verify
- Confirm all existing tests pass
- Verify no behavior changes
- Check that the refactoring achieved its goal

## Usage
Run with `/refactor` command