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igmarin/rails-agent-skills

Curated library of 42 public AI agent skills for Ruby on Rails development, plus 5 callable workflow skills. Organized by category: planning, testing, code-quality, ddd, engines, infrastructure, api, patterns, context, orchestration, and workflows. Covers code review, architecture, security, testing (RSpec), engines, service objects, DDD patterns, and TDD automation.

96

Quality

96%

Does it follow best practices?

Impact

—

No eval scenarios have been run

SecuritybySnyk

Risky

Do not use without reviewing

Overview
Quality
Evals
Security
Files

reference.mdskills/engines/create-engine/

Rails Engine Skeleton

Use this as a baseline when the user asks to create a new engine from scratch.

File Layout

my_engine/
  app/
    controllers/my_engine/application_controller.rb
    models/my_engine/
    services/my_engine/
  config/
    routes.rb
  lib/
    my_engine.rb
    my_engine/version.rb
    my_engine/configuration.rb
    my_engine/engine.rb
  spec/
    dummy/
    lib/
    requests/
    services/
  my_engine.gemspec

Baseline Files

lib/my_engine.rb

require "my_engine/version"
require "my_engine/configuration"
require "my_engine/engine"

module MyEngine
  class << self
    attr_writer :configuration

    def configuration
      @configuration ||= Configuration.new
    end

    def configure
      yield(configuration)
    end
  end
end

lib/my_engine/configuration.rb

module MyEngine
  class Configuration
    attr_accessor :user_class, :audit_events

    def initialize
      @user_class = "User"
      @audit_events = false
    end
  end
end

lib/my_engine/engine.rb

module MyEngine
  class Engine < ::Rails::Engine
    isolate_namespace MyEngine

    initializer "my_engine.configuration" do
      config.my_engine = MyEngine.configuration
    end

    config.to_prepare do
      # Reload-safe host integration only.
    end
  end
end

config/routes.rb

MyEngine::Engine.routes.draw do
  root to: "home#index"
end

app/controllers/my_engine/application_controller.rb

module MyEngine
  class ApplicationController < ActionController::Base
  end
end

Generator Guidance

If the engine needs host installation steps, prefer generators for:

  • copying migrations
  • adding initializer config
  • seeding permissions or setup data
  • creating mount routes when appropriate

Generators should be safe to run more than once.

Testing Baseline

Start with:

  • one configuration spec
  • one request or routing spec through the engine
  • one dummy-app integration check
  • one service spec for a public engine object

Escalation Rules

Do not introduce these unless the user asks or the problem clearly needs them:

  • host app model assumptions hardcoded as constants
  • monkey patches
  • engine-wide global state beyond a single configuration object
  • database writes inside initializers

skills

engines

create-engine

reference.md

SKILL.md

README.md

tile.json