Spree Extensions & Decorators

Before writing code

Fetch live docs:

1. Fetch https://spreecommerce.org/docs/developer/customization/decorators for the modern prepend pattern.
2. Fetch https://spreecommerce.org/docs/developer/customization/v4/deface to confirm Deface deprecation status.
3. Inspect any official Spree extension gem (spree_stripe, spree_klaviyo) for current engine scaffolding.
4. Check the v5.2 announcement for the generator suite added then.
5. Verify the current Spree::Dependencies registry by reading lib/spree/dependencies.rb in the live gem.

Conceptual Architecture

What an Extension Is