Is the Clean DDD Hexagonal skill free?

Yes. The skill itself is free from ccheney/robust-skills. SkillProof publishes the install command and an independent test verdict at no cost.

What is the Clean DDD Hexagonal SkillProof Score?

9.2/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 8/10, docs & honesty 5/5.

How do I install Clean DDD Hexagonal?

Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.

Can I use Clean DDD Hexagonal with Cursor, Copilot, Gemini CLI, Codex or other AI tools?

The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.

Clean DDD Hexagonal

Opinionated DDD + Clean + Hexagonal architecture guide for backend services, any language.

by ccheney · ccheney/robust-skills

Tested · Works

Install — copy the command Download source ↗

Test report

Verdict: Tested · Works
Score: 9.2/10
Tested: Jul 14, 2026
Environment: Claude Code 2.x (agent harness)
Upstream re-checked: Aug 10, 2026 · 3f12841

Asked where an Order aggregate's authorization check belongs and whether to publish domain events directly or via outbox — the skill named the exact failure mode (save-then-publish is two writes; a crash between them silently drops events) that a plain DDD answer from memory left out entirely.

Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works

Installs cleanly 5/5
Triggers reliably 5/5
Output vs. baseline 8/10
Docs & honesty 5/5

What Clean DDD Hexagonal does

Guides domain modeling, layer placement, and dependency direction for backend services using DDD tactical patterns, Clean Architecture, and Hexagonal ports/adapters. Triggers on architecture questions involving aggregates, repositories, bounded contexts, use cases, CQRS, or event sourcing. Language-agnostic (Go, Rust, Python, TypeScript, Java, C#), with a reference doc per concern (layers, DDD strategic/tactical, hexagonal, CQRS/events, testing, cheatsheet).

How to install Clean DDD Hexagonal

git clone https://github.com/ccheney/robust-skills
cd robust-skills
mkdir -p ~/.claude/skills
cp -r skills/clean-ddd-hexagonal ~/.claude/skills/clean-ddd-hexagonal

Skills live in ~/.claude/skills/ (global) or .claude/skills/ (per-project). Restart Claude Code after installing.

Commands — how to trigger Clean DDD Hexagonal

/clean-ddd-hexagonal Opinionated DDD + Clean + Hexagonal architecture guide for backend services, any language.

It also activates on plain-language prompts like these:

Help me design a hexagonal architecture for this order service
How should I model the Order aggregate and where does the repo go?
Where should transaction boundaries and use cases live in Clean Architecture?

Frequently asked questions

Is the Clean DDD Hexagonal skill free?: Yes. The skill itself is free from ccheney/robust-skills. SkillProof publishes the install command and an independent test verdict at no cost.
Does Clean DDD Hexagonal work with Claude Code?: We tested it with Claude Code 2.x (agent harness) on Jul 14, 2026. Verdict: Tested · Works. Asked where an Order aggregate's authorization check belongs and whether to publish domain events directly or via outbox — the skill named the exact failure mode (save-then-publish is two writes; a crash between them silently drops events) that a plain DDD answer from memory left out entirely.
What is the Clean DDD Hexagonal SkillProof Score?: 9.2/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 8/10, docs & honesty 5/5.
How do I install Clean DDD Hexagonal?: Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
Can I use Clean DDD Hexagonal with Cursor, Copilot, Gemini CLI, Codex or other AI tools?: The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.