Domain Driven Design

This is a tactical DDD reference for backend architects that covers entities, value objects, aggregates, repositories, and bounded contexts with Python dataclass implementations. The skill includes a blunt "when NOT to use" section that calls out DDD's 40% code overhead and recommends skipping it entirely for projects under 5 entities. You get quick reference code snippets, rules on aggregate boundaries and invariants, and forbidden anti-patterns like anemic domain models. It's built as a read-only reference (no model invocation) with deeper content loaded on demand from separate markdown files. Best for teams actually wrestling with complex domain logic who need concrete patterns, not for CRUD apps where this would be ceremony theater.

skills.sh installs: 1.3K
GitHub stars: 301
last updated: Aug 21, 2026

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Install

$ npx -y skills add yonatangross/orchestkit --skill domain-driven-design --agent claude-code

Installs into .claude/skills of the current project.

Files

Domain-Driven Design Tactical Patterns

Model complex business domains with entities, value objects, and bounded contexts.

Overview

Modeling complex business logic
Separating domain from infrastructure
Establishing clear boundaries between subdomains
Building rich domain models with behavior
Implementing ubiquitous language in code

Building Blocks Overview

┌─────────────────────────────────────────────────────────────┐
│                    DDD Building Blocks                       │
├─────────────────────────────────────────────────────────────┤
│  ENTITIES           VALUE OBJECTS        AGGREGATES         │
│  Order (has ID)     Money (no ID)        [Order]→Items      │
│                                                              │
│  DOMAIN SERVICES    REPOSITORIES         DOMAIN EVENTS      │
│  PricingService     IOrderRepository     OrderSubmitted     │
│                                                              │
│  FACTORIES          SPECIFICATIONS       MODULES            │
│  OrderFactory       OverdueOrderSpec     orders/, payments/ │
└─────────────────────────────────────────────────────────────┘