# Ruby

> Ruby programming language and Rails framework

- Skill: `neuralblitz/ruby-3` (Agent Skill)
- Install (CLI): `npx skillmds@latest add neuralblitz/ruby-3`
- Raw SKILL.md: https://api.skillmd.com/api/skills/neuralblitz/ruby-3/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- License: MIT
- Author: NeuralBlitz (https://skillmd.com/u/neuralblitz)
- Updated: 2026-09-22
- Page: https://skillmd.com/skills/neuralblitz/ruby-3

---

## What I do
- Write idiomatic Ruby
- Use Rails patterns
- Implement metaprogramming
- Handle RubyGems
- Use RSpec for testing
- Implement ActiveRecord
- Use Rails routing
- Handle background jobs

## When to use me
When writing Ruby or Rails code.

## Ruby Patterns
```ruby
# Metaprogramming
class BaseService
  def self.inherited(subclass)
    define_method(subclass.name.underscore) do |**args|
      klass = Object.const_get(subclass.name)
      klass.new(**args).execute
    end
  end
end

# Blocks and yield
def with_transaction
  ActiveRecord::Base.transaction do
    yield
  rescue => e
    rollback!
    raise e
  end
end

# Rails patterns
class UsersController < ApplicationController
  before_action :set_user, only: [:show, :update]
  
  def index
    @users = User.all.page(params[:page])
    render json: @users
  end
  
  private
  
  def set_user
    @user = User.find(params[:id])
  end
end
```