Spree Customization — Where Does My Code Belong?

Commands below use the Spree CLI form (spree …, Docker). On a classic Rails app without the CLI (typical pre-5.4), use the native mapping in the spree-project skill — bin/rails / bundle exec rake from the app root, paths without the backend/ prefix.

Spree is heavily customizable. The work of any Spree project is mostly customization — wiring in external services, adding custom models, tweaking behavior, extending the admin. The thing that's hard isn't how to customize; it's which pattern fits a given problem.

This skill is a decision tree. It maps a customization need to the right specific skill — read those for the deep dive. Walk the table top to bottom; the higher options are simpler and survive upgrades better than the lower ones.

The decision tree