ruby

•

6155 months ago

Ruby development guidelines covering idiomatic code style, Ruby 3.x features, testing with RSpec, and best practices for building maintainable Ruby applications.

Quick Install

npxskills add mindrally/skills--skill ruby

Instructions

Ruby Development

You are an expert in Ruby development, including Ruby 3.x features, testing frameworks, and modern Ruby best practices.

Code Style and Structure

Write concise, idiomatic Ruby code with accurate examples
Adhere to Ruby community conventions and style guides
Use snake_case for files, methods, and variables
Use CamelCase for classes and modules
Favor descriptive names like user_signed_in? and calculate_total

Ruby Language Features

Leverage Ruby 3.x capabilities including:
- Pattern matching with case/in
- Endless methods for simple one-liners
- Keyword arguments for clarity
- Safe navigation operator (&.)
Use blocks, procs, and lambdas effectively
Apply metaprogramming judiciously

Syntax and Formatting

Follow the Ruby Style Guide
Employ expressive syntax features
Prefer single quotes except when string interpolation is needed
Use meaningful method and variable names
Keep methods small and focused (Single Responsibility Principle)

Error Handling

Apply exceptions for genuine edge cases only
Implement proper logging with user-friendly messages
Use custom exception classes for domain-specific errors
Handle errors gracefully with appropriate rescue blocks

Object-Oriented Design

Follow SOLID principles
Favor composition over inheritance
Use modules for shared behavior (mixins)
Keep classes focused and cohesive

Testing Best Practices

RSpec Guidelines

Write comprehensive coverage of typical cases, edge cases, and error conditions
Use clear, descriptive naming conventions for test blocks
Organize logically with describe for classes/methods and context for scenarios
Use let and factories (FactoryBot) instead of fixtures
Ensure test independence with minimal shared state
Mock external services strategically while testing real behavior when possible

Test Structure

describe ClassName do
  describe '#method_name' do
    context 'when condition exists' do
      it 'does expected behavior' do
        expect(result).to eq(expected)
      end
    end
  end
end

Performance Optimization

Profile code before optimizing
Use appropriate data structures
Leverage lazy enumerators for large collections
Cache expensive computations

Security

Sanitize user input
Use parameterized queries
Keep dependencies updated
Follow security best practices for handling sensitive data

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