dddlisted
Install: claude install-skill claude-dev-suite/claude-dev-suite
# Domain-Driven Design
## Strategic DDD
```
┌─────────────────┐ ┌─────────────────┐
│ Order Context │────▶│ Payment Context │
│ (core domain) │ │ (supporting) │
└────────┬────────┘ └─────────────────┘
│
▼
┌─────────────────┐ ┌─────────────────┐
│ Inventory Context│ │ Notification Ctx │
│ (supporting) │ │ (generic) │
└─────────────────┘ └─────────────────┘
```
## Tactical DDD (TypeScript)
### Entity
```typescript
class Order {
private constructor(
readonly id: OrderId,
private items: OrderItem[],
private status: OrderStatus,
private readonly createdAt: Date,
) {}
static create(items: OrderItem[]): Order {
if (items.length === 0) throw new DomainError('Order must have at least one item');
return new Order(OrderId.generate(), items, OrderStatus.PENDING, new Date());
}
get total(): Money {
return this.items.reduce((sum, item) => sum.add(item.subtotal), Money.zero('USD'));
}
confirm(): DomainEvent[] {
if (this.status !== OrderStatus.PENDING) throw new DomainError('Can only confirm pending orders');
this.status = OrderStatus.CONFIRMED;
return [new OrderConfirmed(this.id, this.total)];
}
}
```
### Value Object
```typescript
class Money {
private constructor(readonly amount: number, readonly currency: string) {
if (amount < 0) throw new DomainError('Amount cannot be negative');
}
static of(amount: number, currency: string): Money {
retu