What is the Functional Core pattern used in this skill?

It is an architectural style where business logic is kept in pure, deterministic functions (the Core) while IO and side effects are restricted to the outer perimeter (the Edge).

Can I use the Architect skill with existing projects?

Yes, it provides a roadmap for refactoring existing features into cleaner layers, starting with entity modeling and moving toward service orchestration and repository separation.

What programming languages does this skill support?

The architectural patterns are language-agnostic and apply to any modern language, though it is particularly effective for TypeScript, JavaScript, Python, and Java environments.

How does this skill improve software testing?

By separating logic from IO, it allows for high unit test coverage in the Functional Core without needing complex mocks, as the core contains no database or network dependencies.

Architect Skill

Name: Architect Skill
Author: martinffx

bymartinffx

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Desarrollo de API

Implements Domain-Driven Design and hexagonal architecture using functional core patterns to create maintainable, testable software systems.

The Architect skill provides a structured framework for designing robust software using Domain-Driven Design (DDD) and Hexagonal Architecture principles. It guides Claude to separate pure business logic, known as the Functional Core, from side-effect-heavy infrastructure like databases and APIs, known as the Effectful Edge. By enforcing dependency inversion and clear component boundaries, this skill helps developers break down complex features into manageable tasks, optimize data modeling, and maintain a clean separation between domain rules and external integrations, resulting in code that is easier to test, refactor, and scale.

Características Principales

01Domain-Driven Design (DDD) modeling and implementation patterns

02Dependency inversion through interface-driven service design

03Functional Core vs. Effectful Edge architectural separation

043 GitHub stars

05Structured component matrix for entities, services, and repositories

06Automated task breakdown with bottom-up dependency ordering

Casos de Uso

01Refactoring monolithic or legacy code into maintainable, layered modules

02Modeling complex domain logic with pure entities and orchestrated services

03Designing new features using a clean architecture approach from scratch

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add martinffx/claude-code-atelier architect

For use in Claude.ai and ChatGPT

Download Skill