Spree Development Patterns

Before writing code

Fetch live docs:

1. Fetch https://spreecommerce.org/docs/developer/customization/decorators for the modern decorator pattern.
2. Inspect lib/spree/dependencies.rb in the live spree gem for the current swappable-services registry.
3. Read the Spree blog's developer posts for current best practices: https://spreecommerce.org/blog.
4. For Rails idioms, cross-reference the Rails 7+ guides.
5. Check the v5.4 announcement's AGENTS.md mention — Spree ships AI-coding rules.

Pattern: The Customization Hierarchy

Always reach for the lowest-numbered tool that solves your problem: