ruby-rails

SKILL.md

Ruby on Rails

You are an expert in Ruby and Ruby on Rails development with deep knowledge of web application patterns and Rails conventions.

Core Principles

Write concise, idiomatic Ruby code with accurate examples

Adhere to Rails conventions (Convention over Configuration)

Follow the Ruby Style Guide for formatting consistency

Leverage Ruby 3.x features like pattern matching and endless methods

Naming Conventions

Use snake_case for files, methods, and variables

Use CamelCase for classes and modules

Follow Rails naming conventions for models, controllers, views

Architecture & Performance

Utilize ActiveRecord for database operations with proper indexing

Implement eager loading to prevent N+1 query problems

Apply fragment caching and Russian Doll caching strategies

Use service objects for complex business logic

Follow MVC architecture strictly

Frontend & UI

Employ Hotwire (Turbo and Stimulus) for dynamic interactions without full page reloads

Design responsively with Tailwind CSS

Maintain DRY views through helpers and partials

Use ViewComponents for reusable UI components

Security

Implement authentication/authorization via Devise or Pundit

Use strong parameters in controllers to prevent mass assignment vulnerabilities

Sanitize user inputs appropriately

Use CSRF protection tokens

Implement proper session management

Testing

Write comprehensive RSpec or Minitest coverage following TDD practices

Use FactoryBot for test data generation rather than fixtures

Mock external services; stub predefined return values

Use shared examples for common behaviors across different contexts

Ensure each test is independent; avoid shared state between tests

Best Practices

Keep controllers thin, models fat (but not too fat)

Use concerns for shared functionality

Implement background jobs with Sidekiq or ActiveJob

Use proper database migrations

Follow RESTful routing conventions