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refactor-session

Plan and execute behavior-preserving code refactors with one change per commit.

Updated Apr 24, 2026
Search Tags:#testing#refactor#software-engineering#version-control#code-cleanup#guard-clauses
One-click install
npx skills add https://github.com/SpencerGoss/agent-engineering --skill refactor-session
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: refactor-session
Source: https://github.com/SpencerGoss/agent-engineering/tree/main/refactor-session
Command: npx skills add https://github.com/SpencerGoss/agent-engineering --skill refactor-session

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This guide helps teams refactor code structure without changing behavior, preserving functionality while improving readability and maintainability.

Core Features & Use Cases

  • Provides a safe, rules-driven approach to restructuring code with a clear guardrail: one change per commit.
  • Emphasizes upfront characterization, test scaffolding, and incremental execution to minimize behavioral drift.
  • Useful for large codebases needing clean organization, easier reuse, and safer feature evolution.

Quick Start

Begin by selecting a small, non-critical module to refactor and document the intended end-state, then write characterization tests before implementing a single, isolated structural change that preserves behavior.

Frequently Asked Questions about refactor-session

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

FAQPage Schema
How do I refactor code structure without altering software behavior?▼

You can refactor code structure safely by writing characterization tests first, documenting the intended end-state, and enforcing a one-change-per-commit discipline to guard against behavioral drift and regression.

What are characterization tests and why do I need them before refactoring?▼

Characterization tests are test scaffolding created to capture the existing behavior of a module before refactoring. They are required to validate that your structural changes preserve the original functionality and maintain a green test suite.

How do I safely restructure a large codebase for better readability and reuse?▼

To safely restructure a large codebase, begin with a small non-critical module, establish guard clauses and test scaffolding, and execute incremental structural changes with a one-change-per-commit rule to minimize behavioral drift.

Does version control help prevent regression during a code cleanup process?▼

Version control supports the code cleanup process by enforcing a one-change-per-commit discipline. This incremental approach provides clear guardrails to isolate structural changes and prevent regression while improving maintainability.

When should I not use a rules-driven approach to refactor code?▼

You should not use a rules-driven refactor approach if you cannot establish a green test suite first. Without characterization tests to validate behavior, incremental structural changes risk introducing untracked behavioral drift.

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