What is the primary benefit of the Hexagonal Architecture skill?

It provides a structured framework for separating business logic from external tools, allowing you to change databases or frameworks without rewriting your core application code.

What tools are included in the Hexagonal Architecture skill?

It includes a boundary-validator for checking dependency rules, an adapter-generator for scaffolding, and a contract-tester to ensure adapters meet port requirements.

Does this skill help with unit testing?

Yes, by defining clear interfaces (ports), it makes mocking complex infrastructure like databases or third-party APIs much simpler, enabling faster and more reliable testing.

How does this skill handle dependency management?

The skill enforces a strict rule where only adapters may depend on external frameworks, while the core domain remains entirely ignorant of the technical implementation details.

Hexagonal Architecture Paradigm

Name: Hexagonal Architecture Paradigm
Author: athola

byathola

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Developer Tools

Employs the Hexagonal (Ports & Adapters) pattern to decouple core domain logic from infrastructure and external dependencies for maximum testability.

About

The Hexagonal Architecture skill empowers Claude to design and refactor systems using the Ports & Adapters pattern, ensuring that core business logic remains isolated from databases, frameworks, and user interfaces. By providing structured guidance on defining inbound and outbound ports, generating adapters, and enforcing strict dependency rules, this skill helps developers build highly maintainable applications that can easily swap external technologies without impacting the domain layer. It is ideal for complex enterprise projects requiring long-term flexibility and rigorous automated testing.

Key Features

Guidance for implementing contract testing between ports and adapters
Automated boilerplate generation for technology-specific adapters
10 GitHub stars
Formal definition of inbound (driver) and outbound (driven) ports
Architecture Decision Record (ADR) support for documenting design choices
Validation tools to prevent leaky abstractions and dependency violations

Use Cases

Building systems that support multiple delivery mechanisms like REST APIs, CLI tools, and message brokers
Refactoring legacy monolithic applications into a decoupled, testable architecture
Designing backend services that must remain independent of specific database or cloud providers

About

Key Features

Guidance for implementing contract testing between ports and adapters
Automated boilerplate generation for technology-specific adapters
10 GitHub stars
Formal definition of inbound (driver) and outbound (driven) ports
Architecture Decision Record (ADR) support for documenting design choices
Validation tools to prevent leaky abstractions and dependency violations

Use Cases

Building systems that support multiple delivery mechanisms like REST APIs, CLI tools, and message brokers
Refactoring legacy monolithic applications into a decoupled, testable architecture
Designing backend services that must remain independent of specific database or cloud providers