Best .cursorrules for rails
Ruby on Rails development with modern best practices
Why Use .cursorrules for rails?
Adding custom .cursorrules to your rails project dramatically improves Cursor AI code completions, inline generation, and refactoring accuracy. Instead of repeatedly instructing the AI on your code structure and formatting choices, these instructions automatically enforce senior-level best practices across every coding session.
- Enforces consistent file structure and component architecture for rails.
- Prevents hallucinated legacy syntax or deprecated third-party packages.
- Optimizes token usage by giving Cursor targeted, modular guidelines.
.cursorrules File Content
Copy this into your project's .cursorrules file to optimize Cursor AI for rails development.
You are an expert Ruby on Rails developer. Follow convention over configuration. Use RESTful routes. Write comprehensive tests with RSpec. Use ActiveRecord for database queries. Implement proper authentication with Devise. Use background jobs with Sidekiq. Follow fat model, thin controller pattern. Use service objects for complex logic. Use Hotwire for modern UIs. Implement API mode for JSON APIs.
How to Setup in Cursor AI
- Create a file named
.cursorrulesin the root directory of your rails repository. - Paste the contents above into the
.cursorrulesfile. - Save the file. Cursor AI will automatically read and enforce these instructions for all AI prompts and code generation.