refactor

Name: refactor
Availability: InStock
Author: sokoliem

Execute behavior-preserving refactors that restructure code while keeping tests and invariants intact.

Updated Aug 23, 2026

Search Tags:#architecture #refactor #code-quality #tests #code-cleanup #behavior-preservation #test-parity

Ready to run

npx skills add https://github.com/Sokoliem/ultraprompt --skill refactor-sokoliem

💬 Prompt for ChatGPT / Claude Chat▼

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

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Behavior-preserving cleanup is essential to improve code readability, maintainability, and architecture without altering observable behavior, supported by a disciplined refactor workflow and before/after testing.

Core Features & Use Cases

Structure-driven refactoring that preserves test parity and invariants.
Guidance on scope, planning, and validation to minimize regressions.
Suitable for cleaning legacy code, reconstructing modules, or extracting concerns while keeping external behavior stable.

Quick Start

Identify a refactor target, outline small incremental steps, and run the test suite after each step to ensure invariants remain intact.

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 without breaking existing functionality?▼

To refactor legacy code without changing behavior, outline small incremental steps and run the test suite after each change to ensure invariants remain intact and test parity is preserved.

What is behavior-preserving code cleanup and when do I need it?▼

Behavior-preserving code cleanup is a refactoring technique that restructures modules to improve readability and maintainability without altering observable behavior, needed when aligning architecture or extracting concerns.

How do I extract concerns from a module while keeping tests passing?▼

Extract concerns by executing structure-driven refactors in small incremental steps, validating that test parity and invariants remain intact after each modification to preserve observable behavior.

Do I need characterization tests to safely refactor a module?▼

Characterization tests are required to safely refactor a module, providing evidence-based validation and documenting before and after states to guarantee test parity and behavior preservation.

What is the best way to document before and after states during a code refactor?▼

Document before and after states during a code refactor by following a disciplined workflow that explicitly records these states, satisfying evidence-based validation and test parity requirements.