kotlin-springboot-hexagonal

Installation
SKILL.md

Kotlin + Spring Boot Hexagonal Architecture Guide

This skill defines the architectural conventions for a Kotlin Spring Boot modular monolith using hexagonal architecture (ports & adapters). Follow these patterns when creating or modifying any code.

Module Structure

The project is organized into strict layers with unidirectional dependencies:

presentation (REST)  →  application (Use Cases)  →  domain (Models)  →  support (Shared Kernel)
Layer Responsibility May Depend On
presentation REST controllers, request/response DTOs, security adapters, Spring config. There can be multiple presentation modules (e.g., *-api, *-admin) sharing the same application layer. application, support
application Use case interfaces (ports/in), service implementations, port/out interfaces domain, support
domain Entities, value objects, domain exceptions, repository interfaces & implementations support
support Base exception hierarchy, error codes, shared enums, cross-cutting types (none)
infrastructure/* External system adapters (Redis, messaging, etc.) domain, support
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11
Repository
ujon/skills
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1
First Seen
Mar 11, 2026