How does it ensure the code isn't broken during refactoring?

It employs a small-step cycle: identify a smell, apply one tiny transformation, verify with tests, and commit. If tests fail, it reverts the change immediately.

What languages are supported by this refactoring skill?

While the principles apply generally, it includes specialized support and idioms for Python and TypeScript, such as context managers and type narrowing.

What specific code smells can it identify?

It detects several common issues including Long Methods, God Classes, Data Clumps, Primitive Obsession, Shotgun Surgery, and Feature Envy.

Can I use this if my project doesn't have existing unit tests?

The skill follows a strict verification protocol. If no tests exist, it will prioritize writing characterization tests to capture current behavior before any refactoring begins.

Does this skill fix bugs or add new features?

No, this skill is strictly for behavior-preserving transformations. It focuses on changing the internal structure of the code without changing its external functionality.

Refactoring Patterns & Code Smells

Name: Refactoring Patterns & Code Smells
Author: AnExiledDev

byAnExiledDev

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Developer Tools

Automates behavior-preserving code transformations using a rigorous smell-detect, transform, and verify cycle for Python and TypeScript.

The Refactoring Patterns skill empowers Claude to perform disciplined code restructuring without changing external behavior. It identifies common code smells like 'God Classes' and 'Feature Envy,' applying proven transformations such as 'Extract Function' or 'Introduce Parameter Object.' By enforcing a strict verification protocol that requires passing tests before and after every change, it ensures that technical debt is reduced safely. This skill is ideal for cleaning up legacy code, simplifying complex logic, and aligning codebases with language-specific idioms in Python and TypeScript.

Key Features

01Behavior-preserving transformations like Extract Function, Inline Variable, and Pull Up Method

02Strict test-driven verification protocol to ensure zero regressions during cleanup

03Language-specific refactoring idioms for Python dataclasses and TypeScript discriminated unions

046 GitHub stars

05Automated code smell detection including God Class, Feature Envy, and Primitive Obsession

06Atomic commit strategy for incremental, independently revertible structural changes

Use Cases

01Simplifying complex legacy functions into readable, modular, and testable components

02Migrating scattered primitive data types to robust Value Objects or specialized Dataclasses

03Reducing code duplication and coupling by replacing large switch-cases with polymorphism

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add anexileddev/codeforge refactoring-patterns

For use in Claude.ai and ChatGPT

Download Skill