# Refactor Dedupe And Cleanup

> [Code Quality] Removes code duplication and cleans up dead code. Use to eliminate copy-paste code, consolidate similar logic, and remove unused code paths.

- Skill: `majiayu000/refactor-dedupe-and-cleanup` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds add majiayu000/refactor-dedupe-and-cleanup`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/refactor-dedupe-and-cleanup/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/majiayu000/refactor-dedupe-and-cleanup

---


# Refactor: Dedupe and Cleanup

Eliminate redundancy and remove dead code.

## Deduplication Patterns

### 1. Extract Common Method
Move duplicated logic to shared function.

### 2. Template Method Pattern
Abstract common structure, vary details.

### 3. Consolidate Conditional Expression
Combine conditions with same result.

## Dead Code Removal

### Types to Remove
1. Unreachable code - after return/throw
2. Unused variables - declared but never read
3. Unused functions - never called
4. Commented code - use git history instead
5. Unused imports - clutters namespace

### Safe Removal Process
1. Search for all references
2. Check for reflection/dynamic usage
3. Remove in small commits
4. Run full test suite