create-engine
Installation
SKILL.md
Create Engine
Use this skill when the task is to create, scaffold, or refactor a Rails engine, Rails plugin, or engine gem.
Keep this skill focused on structure and design. Use adjacent skills for installer details, deep test coverage, release workflow, or documentation work.
Quick Reference
| Engine Type | When to Use |
|---|---|
| Plain gem | No Rails hooks or app directories needed; pure Ruby library |
| Railtie | Needs Rails initialization hooks but not models/controllers/routes/views |
| Engine | Needs Rails autoload paths, initializers, migrations, assets, jobs, or host integration |
| Mountable engine | Needs its own routes, controllers, views, assets, and namespace boundary |