---
stable_id: skills/skills-sh-ccheney-robust-skills-clean-ddd-hexagonal
type: skills
title: skills-sh-ccheney-robust-skills-clean-ddd-hexagonal
summary: |-
  # Layer Structure - Complete Reference
  > Sources:
  > Primary:
  > - [The Clean Architecture](https://blog.cleancoder.com/uncle-bob/2012/08/13/the-clean-architecture.html) — Robert C. Martin
  > - [Onion Architecture](https://jeffreypalermo.com/2008/07/the-onion-architecture-part-1/) — Jeffrey Palermo
  > Implementation guide:
  > - [Designing a DDD-oriented Microservice](https://learn.microsoft.com/en-us/dotnet/architecture/microservices/microservice-ddd-cqrs-patterns/ddd-oriented-microservice) — Microsoft
  > Supplemental synthesis:
  > - [Clean Architecture: Standing on the Shoulders of Giants](https://herbertograca.com/2017/09/28/clean-architecture-standing-on-the-shoulders-of-giants/) — Herberto Graça
  ## The Four Layers
tags:
  - skills-sh
  - skills-sh-all-time
source_url: https://raw.githubusercontent.com/ccheney/robust-skills/HEAD/skills/clean-ddd-hexagonal/references/LAYERS.md
license: ""
upstream_ref: https://skills.sh/ccheney/robust-skills/clean-ddd-hexagonal
github_stars: null
github_forks: null
github_is_organization: null
retrieved_at: 2026-06-11T08:32:04.318Z
content_sha256: 2fd1ee569b25ead0d5683e16da82451a46659f4fe271fa50a960a4aad7680a28
---
