domain-building-blocks

Implement domain models with value objects, entities, aggregates, and domain services.

81|3|Updated Jan 14, 2026
One-click install
npx skills add https://github.com/j5ik2o/okite-ai --skill domain-building-blocks
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: domain-building-blocks
Source: https://github.com/j5ik2o/okite-ai/tree/main/.agent/skills/domain-building-blocks
Command: npx skills add https://github.com/j5ik2o/okite-ai --skill domain-building-blocks

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This guide helps engineers design and implement domain-building blocks (value objects, entities, aggregates, domain services) in a language-agnostic way, improving clarity and maintainability of domain models.

Core Features & Use Cases

  • Value objects: immutable, behavior-rich design for attributes like money or measurements.
  • Entities and aggregates: clear identity and transactional boundaries for complex domains.
  • Domain services: orchestrate cross-entity operations to maintain invariants.

Quick Start

Create a Money value object using TypeScript to enforce immutability and validation.

Frequently Asked Questions about domain-building-blocks

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I implement a Money value object in TypeScript with immutability and validation?

To implement a Money value object in TypeScript, you define an immutable structure that enforces validation rules within its constructor. This ensures monetary attributes remain behavior-rich and consistently validated across domain operations.

When do I need an aggregate versus an entity in domain-driven design?

You need an aggregate in domain-driven design when establishing clear transactional boundaries for complex domains, whereas an entity primarily manages identity. Aggregates group entities to maintain invariants and ensure consistent state changes.

How do I orchestrate cross-entity operations to maintain domain invariants?

To orchestrate cross-entity operations and maintain domain invariants, you implement domain services. These services coordinate logic across multiple entities or aggregates without enforcing behavior that naturally belongs to a single entity.

Can I use these domain modeling patterns for Java or C# projects, not just TypeScript?

Yes, you can use these domain modeling patterns for Java or C# projects. The guide clarifies and implements domain models using a language-agnostic approach, making value objects, entities, and aggregates adaptable across any language.

What is the best way to define explicit boundaries for complex business domains?

The best way to define explicit boundaries for complex business domains is by structuring domain models with aggregates and domain services. This approach enforces transactional limits and orchestrates operations to satisfy explicit modeling rules.