How does it differentiate between Service and Domain layers?

The Domain layer contains pure business models, dataclasses, and rules with zero external dependencies. The Service layer coordinates these models and handles business operations and orchestration.

What architectural pattern does this skill support?

It primarily supports the Service Layer pattern, which is a core component of Clean Architecture and Hexagonal Architecture, emphasizing separation of concerns in Python applications.

Can it help refactor existing code?

Yes, the skill is designed to identify common anti-patterns—such as business logic in CLI scripts or I/O operations in domain models—and provide specific placement recommendations for refactoring.

Why is the dependency flow important in this skill?

Proper dependency flow (Entry Point → Service → Infrastructure/Domain) ensures that your core business logic remains independent of external tools, databases, and delivery mechanisms, making the code easier to test and maintain.

Identifying Layer Placement

Name: Identifying Layer Placement
Author: gestrich

bygestrich

0•

API 开发

Categorizes Python code into appropriate architectural layers to ensure clean separation of concerns and maintainable Service Layer patterns.

This skill provides Claude with the architectural expertise needed to organize Python applications using the Service Layer pattern. By applying a structured decision tree, it helps developers determine whether code belongs in the Entry Point (CLI/API), Service (business logic), Infrastructure (external I/O), or Domain (pure models) layer. This prevents architectural debt by identifying layer violations and anti-patterns early in the development or refactoring process, ensuring that the domain remains pure and the dependency flow remains unidirectional.

主要功能

01Architectural decision tree for rapid code categorization

02Implementation patterns for Entry Point, Service, Domain, and Infrastructure layers

03Identification and prevention of common layer violations

040 GitHub stars

05Guidance on dependency flow and pure domain modeling

06Practical examples for refactoring legacy code into clean architecture

使用场景

01Onboarding team members to a project's specific architectural standards

02Adding new functionality to an existing Python service without creating technical debt

03Refactoring monolithic scripts into a structured multi-layer architecture

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add gestrich/python-architecture identifying-layer-placement

For use in Claude.ai and ChatGPT

主要功能

01Architectural decision tree for rapid code categorization

02Implementation patterns for Entry Point, Service, Domain, and Infrastructure layers

03Identification and prevention of common layer violations

040 GitHub stars

05Guidance on dependency flow and pure domain modeling

06Practical examples for refactoring legacy code into clean architecture

使用场景

01Onboarding team members to a project's specific architectural standards

02Adding new functionality to an existing Python service without creating technical debt

03Refactoring monolithic scripts into a structured multi-layer architecture

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add gestrich/python-architecture identifying-layer-placement

For use in Claude.ai and ChatGPT