DDD Tactical Design Patterns in Go

Purpose

To guide implementation of Domain-Driven Design tactical patterns in idiomatic Go. This skill covers Entities, Value Objects, Aggregates, Repositories, Domain Services, Domain Events, Factories, and Specifications using Go-native idioms (composition over inheritance, interfaces, unexported fields, functional options).

When to Use This Skill

• Implementing domain models with rich business logic in Go
• Designing aggregate boundaries and consistency rules
• Creating repository interfaces and infrastructure implementations
• Building event-driven domain models
• Structuring a Go project following DDD layered architecture
• Reviewing domain code for DDD pattern adherence

Core Principles

1. Go idioms first - No Java-style OOP. Use composition, interfaces, and package boundaries
2. Unexported fields - All entity/aggregate fields lowercase; expose through getters and behavior methods