Domain Builder

When to use

Use this skill when asked to create a new domain module (bounded context) in the domains/ directory, or to add new aggregates/commands/events to an existing domain.

Reference

Two patterns exist in the codebase:

• Simple (todo): Everything in a single file lib/{domain}/todo.rb
• Structured (crm, ordering, etc.): Separate files for commands, events, aggregates, and handlers

Use the structured pattern for any non-trivial domain. The simple pattern is only for demos.

Step-by-step process

1. Gather requirements