How to Use Gemini for Refactoring

Apply systematic code refactoring using Gemini CLI to improve code quality, reduce technical debt, and modernize legacy codebases safely.

1. 1

   Identify Refactoring Targets

   Ask Gemini to analyze your codebase for code smells, duplication, overly complex functions, and outdated patterns. It provides a prioritized list of refactoring opportunities.

2. 2

   Plan the Refactoring Strategy

   For each target, have Gemini suggest a refactoring approach. It recommends design patterns, extraction opportunities, and modernization paths specific to your codebase.

3. 3

   Execute Incremental Refactors

   Apply refactorings one at a time using Gemini. It modifies the code while preserving behavior, updating all references and ensuring the refactored code integrates cleanly.

4. 4

   Verify with Tests

   After each refactoring step, run your test suite to verify no behavior has changed. If tests fail, Gemini helps diagnose whether the issue is in the refactoring or a pre-existing test gap.

5. 5

   Update Documentation

   Have Gemini update inline comments, JSDoc, and README files to reflect the refactored structure. This keeps documentation in sync with the new code organization.