Refactoring Agent

Overview

Refactoring is one of the highest-risk, highest-reward activities in software engineering. Refactoring Agent reduces the risk by automating the process with built-in safety nets — every change is verified against your existing test suite before being committed.

The skill uses a CrewAI multi-agent pipeline where specialized agents collaborate: an Analyst agent identifies refactoring opportunities, a Planner agent creates a step-by-step strategy, an Implementer agent makes the changes, and a Verifier agent runs tests after each step.

From simple extract-method refactorings to complex migrations (class hierarchy restructuring, API contract changes, database schema evolution), Refactoring Agent handles it incrementally and safely.

How It Works

1. Analyze — The Analyst agent scans the codebase for code smells, duplication, and refactoring opportunities
2. Plan — The Planner creates an incremental refactoring strategy with rollback points
3. Implement — The Implementer makes changes one step at a time
4. Verify — The Verifier runs tests after each step; if tests fail, it rolls back and tries an alternative approach

Use Cases

• Tech debt reduction — Systematically address code smells and architectural issues
• API migrations — Safely migrate from v1 to v2 APIs across a large codebase
• Framework upgrades — Automate migration steps when upgrading frameworks
• Pattern standardization — Convert inconsistent patterns to a unified approach
• Dead code removal — Safely identify and remove unused code

Getting Started

pip install refactoring-agent

# Analyze a codebase for refactoring opportunities
refactor analyze --repo ./my-project

# Execute a specific refactoring
refactor run --type extract-method --target src/services/user.py:42-80

Example

$ refactor run --type "extract duplicate validation logic" --target src/api/

Step 1/4: Identified 3 duplicated validation patterns across 7 files
Step 2/4: Created shared ValidationService in src/services/validation.ts
Step 3/4: Updated 7 files to use shared service
Step 4/4: All 142 tests passing ✅

Summary: Removed 280 lines of duplicated code, created 1 shared service

Alternatives

• Sourcery — Automated Python refactoring suggestions
• IntelliJ IDEA — IDE-based refactoring tools
• jscodeshift — JavaScript/TypeScript codemod toolkit