Refactoring Jules Code for Production

Jules handles well-scoped refactoring tasks well but may not understand the full scope of a large refactor across many files. It may refactor within one file correctly while leaving call sites in other files untouched

Write detailed, well-scoped issue descriptions for Jules refactoring tasks. Specify which files should be changed and what the expected outcome is. Follow up Jules refactoring PRs with a search for any remaining instances of the old pattern that Jules may have missed

Not all Jules code needs refactoring. If it works, is secure, and you don't need to modify it, leave it alone. Refactor when: you need to add features and the current structure makes it difficult, bugs keep appearing in the same area of code, or onboarding new developers takes too long because the code is hard to understand.

The golden rule of refactoring: behavior stays the same, structure changes. Before refactoring any code, make sure you have tests covering the current behavior (or add them first). Refactor in small steps — change one thing at a time and verify the app still works. Use version control (git) to commit after each successful change so you can revert if something breaks.

A well-organized project has a predictable structure where anyone can find what they're looking for. Group files by feature (not by type), keep related code together, and use clear naming. Every file should have a single clear purpose. If you can't describe what a file does in one sentence, it's probably doing too much and should be split.