DDD Tactical Patterns

ddd-tactical-patterns

Apply DDD tactical patterns in code using entities, value objects, aggregates, repositories, and domain events with explicit invariants.

boisenoise/skills-collections·0installs10starsDevOps & CI/CD

SKILL.md

Full skill instructions

DDD Tactical Patterns

Use this skill when

Translating domain rules into code structures.
Designing aggregate boundaries and invariants.
Refactoring an anemic model into behavior-rich domain objects.
Defining repository contracts and domain event boundaries.

Do not use this skill when

You are still defining strategic boundaries.
The task is only API documentation or UI layout.
Full DDD complexity is not justified.

Instructions

Identify invariants first and design aggregates around them.
Model immutable value objects for validated concepts.
Keep domain behavior in domain objects, not controllers.
Emit domain events for meaningful state transitions.
Keep repositories at aggregate root boundaries.

If detailed checklists are needed, open references/tactical-checklist.md.

Example

class Order {
  private status: "draft" | "submitted" = "draft";

  submit(itemsCount: number): void {
    if (itemsCount === 0) throw new Error("Order cannot be submitted empty");
    if (this.status !== "draft") throw new Error("Order already submitted");
    this.status = "submitted";
  }
}

Limitations

This skill does not define deployment architecture.
It does not choose databases or transport protocols.
It should be paired with testing patterns for invariant coverage.

Install skill

Copy and run in your terminal

npx -y skills add https://github.com/boisenoise/skills-collections --skill antigravity-ddd-tactical-patterns

View on GitHub

skills/antigravity-ddd-tactical-patterns/SKILL.md

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