refactor

Identify code smells and plan test-driven refactors that preserve behavior.

Updated Dec 3, 2025

Search Tags:#code quality #testing #maintainability #refactor #software-engineering #design-patterns

Ready to run

npx skills add https://github.com/idodoron11/Agentarium --skill refactor-idodoron11

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: refactor
Source: https://github.com/idodoron11/Agentarium/tree/main/skills/refactor
Command: npx skills add https://github.com/idodoron11/Agentarium --skill refactor-idodoron11

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Improve code structure and readability without changing external behavior. Refactoring is gradual evolution, not revolution. Use this skill for improving existing code, not rewriting from scratch.

Core Features & Use Cases

Identify code smells such as long methods, duplicated logic, large classes, and tight coupling.
Apply safe refactors including extract method, rename, decompose conditional, and introduce parameter objects.
Use cases: incremental improvements in a legacy module, or adapting a module to new requirements without altering observable behavior.

Quick Start

Analyze a small function with high complexity, implement a tiny refactor, run tests, and commit if green.

Frequently Asked Questions about refactor

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I refactor legacy code to improve readability without changing behavior?▼

Refactor legacy code by identifying smells like long methods and tight coupling, then applying small, test-driven changes such as extract method or rename. This preserves external behavior while gradually evolving the internal structure.

What are common code smells to look for before refactoring?▼

Common code smells include long methods, duplicated logic, large classes, and tight coupling. Identifying these issues helps plan tiny, verifiable refactors that maintain existing functionality and improve overall maintainability.

How do I safely apply design patterns to a complex module?▼

Safely apply design patterns by decomposing conditionals, introducing parameter objects, or extracting methods. Use tiny, test-driven steps and ensure all tests pass before committing changes to preserve observable behavior.

What is the best way to refactor a large function without breaking existing tests?▼

The best way is using incremental, test-driven refactors. Extract small methods from the large function, run tests after each tiny change to verify behavior, and obtain approval before committing the green test suite.

When should I refactor code instead of rewriting it from scratch?▼

Refactor instead of rewriting when making incremental improvements to adapt a module to new requirements or clean up a legacy module. Refactoring is a gradual evolution that preserves observable behavior, unlike a full rewrite.

Can I use automated refactoring for duplicated logic in a legacy module?▼

Yes, you can refactor duplicated logic by applying safe techniques like extract method and introduce parameter objects. Plan small, verifiable steps, ensure tests pass, and obtain user approval before committing the refactored code.