How do I install the Refactor skill?

Run npx skillmds@latest add asiaostrich/refactor in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Refactor safe to use?

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Which AI agents work with Refactor?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Refactor free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Refactor?

AsiaOstrich (@asiaostrich) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Refactor by asiaostrich — Agent Skill

Name: Refactor
Rating: 4.666666666666667 (3 reviews)
Author: AsiaOstrich

Refactor

[UDS] Guide refactoring decisions and strategy selection, including the refactor-versus-rewrite call. Use when: code has become hard to change, choosing between tactical and architectural refactoring, working safely inside legacy code. Not for: moving to a different framework or major version — use /migrate; clearing debug artifacts and dead code — use /sweep. Keywords: refactor, rewrite, strangler, legacy code, technical debt, code smell, 重構, 重寫, 技術債.

AsiaOstrich 22be2c4 2 files · 15.7 KB Updated Sep 10, 2026

File contents

Refactoring Assistant | 重構助手

Guide refactoring decisions, recommend strategies, and provide step-by-step execution workflows.

引導重構決策、推薦策略，並提供逐步執行工作流程。

Usage | 使用方式

Command	Purpose	用途
`/refactor`	Start interactive refactoring guide	啟動互動式重構引導
`/refactor decide`	Run refactor vs. rewrite decision tree	執行重構 vs 重寫決策樹
`/refactor tactical`	Suggest tactical (daily) strategies	建議戰術性（日常）策略
`/refactor strategic`	Guide strategic/architectural refactoring	引導戰略性/架構重構
`/refactor legacy`	Legacy code safety strategies	遺留程式碼安全策略
`/refactor debt`	Technical debt assessment	技術債評估

Strategy Quick Reference | 策略快速參考

Tactical Strategies (Daily) | 戰術性策略

Strategy	When to Use	使用時機
Preparatory Refactoring	Before adding a blocked feature	新增被阻擋的功能之前
Boy Scout Rule	During any maintenance work	任何維護工作中
Red-Green-Refactor	TDD development cycle	TDD 開發循環

Strategic Strategies (Architectural) | 戰略性策略

Strategy	When to Use	使用時機
Strangler Fig	Replacing entire system gradually	逐步替換整個系統
Anti-Corruption Layer	Integrating with legacy system	與遺留系統整合
Branch by Abstraction	Shared code refactoring on trunk	在主幹上重構共享程式碼

Safety Strategies (Legacy) | 安全防護策略

Strategy	When to Use	使用時機
Characterization Tests	Before any legacy refactoring	任何遺留程式碼重構之前
Scratch Refactoring	Understanding black-box code	理解黑盒程式碼
Finding Seams	Injecting test doubles into legacy	在遺留程式碼中注入測試替身

Workflow | 工作流程

Assess - Identify code to refactor, evaluate test coverage
Decide - Run decision tree (refactor vs. rewrite) if needed
Select strategy - Choose appropriate strategy based on scope and risk
Execute - Follow step-by-step workflow with safety checks
Verify - Run tests to confirm behavior is preserved

Usage Examples | 使用範例

User: /refactor src/legacy-auth/
AI: Analyzing src/legacy-auth/...
    Test coverage: 23% — recommending safety-first approach.
    Suggested strategy: Characterization Tests + Preparatory Refactoring

User: /refactor decide
AI: Let me help you decide whether to refactor or rewrite.
    Question 1: Is the code currently working in production? [Y/N]

Next Steps Guidance | 下一步引導

After /refactor completes, the AI assistant should suggest:

重構完成。建議下一步 / Refactoring complete. Suggested next steps:

執行 /checkin 通過品質關卡 ⭐ Recommended / 推薦 — Pass quality gates

執行 /coverage 確認重構後覆蓋率不下降 — Verify coverage not decreased

執行 /commit 提交重構變更 — Commit the refactoring changes

Reference | 參考

Detailed guide: guide.md
Core standard: refactoring-standards.md

AI Agent Behavior | AI 代理行為

完整的 AI 行為定義請參閱對應的命令文件：/refactor

For complete AI agent behavior definition, see the corresponding command file: /refactor

---name: refactordescription: [UDS] Guide refactoring decisions and strategy selection, including the refactor-versus-rewrite call. Use when: code has become hard to change, choosing between tactical and architectural refactoring, working safely inside legacy code. Not for: moving to a different framework or major version — use /migrate; clearing debug artifacts and dead code — use /sweep. Keywords: refactor, rewrite, strangler, legacy code, technical debt, code smell, 重構, 重寫, 技術債.---# Refactoring Assistant | 重構助手Guide refactoring decisions, recommend strategies, and provide step-by-step execution workflows.引導重構決策、推薦策略，並提供逐步執行工作流程。## Usage | 使用方式| Command | Purpose | 用途 ||---------|---------|------|| `/refactor` | Start interactive refactoring guide | 啟動互動式重構引導 || `/refactor decide` | Run refactor vs. rewrite decision tree | 執行重構 vs 重寫決策樹 || `/refactor tactical` | Suggest tactical (daily) strategies | 建議戰術性（日常）策略 || `/refactor strategic` | Guide strategic/architectural refactoring | 引導戰略性/架構重構 || `/refactor legacy` | Legacy code safety strategies | 遺留程式碼安全策略 || `/refactor debt` | Technical debt assessment | 技術債評估 |## Strategy Quick Reference | 策略快速參考### Tactical Strategies (Daily) | 戰術性策略| Strategy | When to Use | 使用時機 ||----------|-------------|---------|| **Preparatory Refactoring** | Before adding a blocked feature | 新增被阻擋的功能之前 || **Boy Scout Rule** | During any maintenance work | 任何維護工作中 || **Red-Green-Refactor** | TDD development cycle | TDD 開發循環 |### Strategic Strategies (Architectural) | 戰略性策略| Strategy | When to Use | 使用時機 ||----------|-------------|---------|| **Strangler Fig** | Replacing entire system gradually | 逐步替換整個系統 || **Anti-Corruption Layer** | Integrating with legacy system | 與遺留系統整合 || **Branch by Abstraction** | Shared code refactoring on trunk | 在主幹上重構共享程式碼 |### Safety Strategies (Legacy) | 安全防護策略| Strategy | When to Use | 使用時機 ||----------|-------------|---------|| **Characterization Tests** | Before any legacy refactoring | 任何遺留程式碼重構之前 || **Scratch Refactoring** | Understanding black-box code | 理解黑盒程式碼 || **Finding Seams** | Injecting test doubles into legacy | 在遺留程式碼中注入測試替身 |## Workflow | 工作流程1. **Assess** - Identify code to refactor, evaluate test coverage2. **Decide** - Run decision tree (refactor vs. rewrite) if needed3. **Select strategy** - Choose appropriate strategy based on scope and risk4. **Execute** - Follow step-by-step workflow with safety checks5. **Verify** - Run tests to confirm behavior is preserved## Usage Examples | 使用範例```User: /refactor src/legacy-auth/AI: Analyzing src/legacy-auth/... Test coverage: 23% — recommending safety-first approach. Suggested strategy: Characterization Tests + Preparatory Refactoring``````User: /refactor decideAI: Let me help you decide whether to refactor or rewrite. Question 1: Is the code currently working in production? [Y/N]```## Next Steps Guidance | 下一步引導After `/refactor` completes, the AI assistant should suggest:> **重構完成。建議下一步 / Refactoring complete. Suggested next steps:**> - 執行 `/checkin` 通過品質關卡 ⭐ **Recommended / 推薦** — Pass quality gates> - 執行 `/coverage` 確認重構後覆蓋率不下降 — Verify coverage not decreased> - 執行 `/commit` 提交重構變更 — Commit the refactoring changes## Reference | 參考- Detailed guide: [guide.md](./guide.md)- Core standard: [refactoring-standards.md](../../core/refactoring-standards.md)## AI Agent Behavior | AI 代理行為> 完整的 AI 行為定義請參閱對應的命令文件：[`/refactor`](../commands/refactor.md#ai-agent-behavior--ai-代理行為)>> For complete AI agent behavior definition, see the corresponding command file: [`/refactor`](../commands/refactor.md#ai-agent-behavior--ai-代理行為)

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