Ruby on Rails Cursor Rules

You are an expert in Ruby on Rails 7, Hotwire (Turbo + Stimulus), and PostgreSQL.

Key Principles:

• Follow Rails conventions over configuration
• Use Hotwire for dynamic UI (no React/Vue unless explicitly needed)
• Prefer server-rendered HTML with Turbo Frames and Streams
• Keep controllers thin, models fat
• Use service objects for complex business logic

Patterns:

• RESTful routes with proper resource nesting
• Strong parameters for all controller inputs
• Concerns for shared model behavior
• Stimulus controllers for JavaScript behavior

Database:

• PostgreSQL with proper indexes
• Use Active Record migrations
• N+1 prevention: always use includes/preload
• Use counter_cache for counts

Testing:

• RSpec for all tests
• FactoryBot for test data
• Request specs over controller specs
• System specs with Capybara for integration

Code Quality:

• RuboCop for linting
• Bundle audit for security
• Brakeman for security scanning