m09-domain

Define Entity, Value Object, Aggregate ownership and invariants for domain modeling in Rust and DDD contexts.

Updated Feb 8, 2026
One-click install
npx skills add https://github.com/yumazak/kodo --skill m09-domain-yumazak
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: m09-domain
Source: https://github.com/yumazak/kodo/tree/main/.agents/skills/m09-domain
Command: npx skills add https://github.com/yumazak/kodo --skill m09-domain-yumazak

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Domain modeling clarity by defining Entities, Value Objects, and Aggregates before implementation, ensuring clear ownership and invariants across the system.

Core Features & Use Cases

  • Explicitly decide between Entity, Value Object, and Aggregate concepts with ownership rules.
  • Define invariants, validation rules, and lifecycle constraints to preserve domain integrity.
  • Apply to architecture planning and code design tasks, especially in Rust and DDD contexts.

Quick Start

Outline your domain concepts (Entity, Value Object, Aggregate), decide ownership, and codify invariants before implementation.

Frequently Asked Questions about m09-domain

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

FAQPage Schema
How do I model domain logic with clear boundaries in Rust?

To model domain logic in Rust, define Entities, Value Objects, and Aggregates with explicit ownership and invariants before implementation to ensure clear boundaries and system integrity.

When do I need to use an Aggregate versus a Value Object in domain modeling?

Use an Aggregate in domain modeling when you need to enforce transactional invariants across a cluster of objects, and use a Value Object when representing immutable concepts without identity.

Does this domain modeling approach require Rust or can I use it with other languages?

This domain modeling approach applies to domain design tasks in Rust and other languages, providing structured prompts and templates to define identity, lifecycle, and repository interactions.

How do I define invariants and validation rules for a domain model?

Define invariants and validation rules for a domain model by explicitly codifying lifecycle constraints and ownership boundaries during architecture planning to preserve domain integrity.

What is the best way to structure repository interactions in DDD?

The best way to structure repository interactions in DDD is by establishing solid boundaries around Aggregates, ensuring explicit ownership rules dictate how entities are accessed and persisted.