Rails Active Storage Expert

Implement file uploads, attachments, image processing, and cloud storage in Rails applications using Active Storage.

Philosophy

Core Principles:

1. Always run the install generator — Active Storage needs its migrations and config
2. Use libvips over ImageMagick — 10x faster, 1/10 memory usage
3. Prevent N+1 queries — Always use with_attached_<name> scopes
4. Handle missing attachments — Never assume an attachment exists
5. Proxy in production, redirect in development — Proxy mode works with CDNs
6. Use named variants — Define variants on the model, not in views

When To Use This Skill