What is the main benefit of using CQS in .NET?

CQS ensures methods are either commands (actions) or queries (data retrieval), making code easier to reason about, test, and maintain by eliminating unexpected side effects.

How does this skill help with unit testing?

By separating side effects from data retrieval, it allows for more granular unit tests and clearer mocking of dependencies within the .NET ecosystem.

Does this skill support full CQRS architectural patterns?

Yes, it provides implementation patterns for Commands, Queries, Handlers, and Dispatchers to separate read and write responsibilities at the application level.

Are there any exceptions to the CQS rules provided?

The skill identifies valid exceptions such as atomic operations (e.g., Interlocked), fluent APIs that return 'this', and factory methods that return created objects.

.NET CQS & CQRS Patterns

Name: .NET CQS & CQRS Patterns
Author: DoubleslashSE

byDoubleslashSE

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API開発

Implements Command Query Separation and Responsibility Segregation patterns to create predictable and testable .NET applications.

This skill provides specialized guidance for implementing Command Query Separation (CQS) and Command Query Responsibility Segregation (CQRS) within .NET environments. It helps developers maintain a clean separation between operations that change state (Commands) and those that retrieve data (Queries), leading to more maintainable, testable, and scalable codebases. The skill includes comprehensive patterns for method-level separation, architectural handlers, and the dispatcher pattern, while also identifying valid exceptions like fluent APIs and atomic operations to ensure practical application in real-world C# projects.

主な機能

01Architectural CQRS implementation patterns for .NET

02Dispatcher pattern implementation for decoupled application logic

031 GitHub stars

04Method-level Command Query Separation (CQS) guidance

05Standardized Command and Query handler interfaces

06Best practices for handling CQS exceptions like fluent APIs and factories

ユースケース

01Refactoring legacy .NET methods that mix data retrieval with state changes

02Designing scalable backend microservices using CQRS and separate read/write models

03Implementing clean, testable business logic with standardized handler patterns

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add doubleslashse/claude-marketplace cqs-patterns

For use in Claude.ai and ChatGPT

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