• bin/rails s - Start development server on port 3000
• bin/rake - Run full test suite (RSpec + Capybara)
• bin/rspec spec/features/user_spec.rb - Run single test file
• bin/rails db:migrate - Run database migrations
• bin/rails c - Rails console

• Ruby version: Use version in .ruby-version (Ruby 3.x)
• Naming: snake_case for methods/vars, SCREAMING_SNAKE_CASE for constants
• Classes: PascalCase, inherit from ApplicationRecord/ApplicationController
• Methods: Use def method_name = for single-line methods
• Validation: Use Rails validators with custom messages
• Dependencies: PostgreSQL database, RSpec for testing, CanCanCan for authorization
• Error handling: Use rescue_from in controllers, flash messages for user feedback
• Security: Use has_secure_password, validate input formats with regex
• Tests: Feature tests with Capybara, factory_bot for test data
• Imports: Standard Rails requires, gems from Gemfile only

Rails 8.0 app for Wandering Dragons Chess Club with users, games, blogs, and admin features.