software-architecture

Software Architecture - A Development Guide for Quality-Focused Software Architecture

Skill Overview

The Software Architecture skill provides development guidance for writing high-quality, maintainable code based on Clean Architecture and Domain-Driven Design (DDD) principles. It helps developers build software that is clearer to understand, easier to extend, and simpler to maintain.

Applicable Scenarios

During the Project Architecture Design Phase

When you need to design the overall architecture for a new project, this skill offers guidance on layered architecture, domain separation, and module boundary definitions—ensuring the architecture is clear and responsibilities are well defined.

Code Refactoring and Quality Improvement

When existing code suffers from duplication, tight coupling, or poor maintainability, this skill provides refactoring paths and best practices to incrementally improve code quality.

Establishing Team Development Conventions

When a team needs to unify coding style and architecture standards, this skill provides actionable coding guidelines and naming conventions to reduce technical debt.

Core Features

Guidance on Code Style Rules

Offers specific coding standards such as early return patterns, a preference for arrow functions, and splitting components into smaller units—helping developers write code that is easier to read and maintain.

Best Practices for Architecture Design

Based on Clean Architecture and DDD principles, guidance on how to separate domain logic from infrastructure, how to define clear use-case boundaries, and how to avoid mixing business logic with UI components.

Library-First Development Strategy

Helps developers evaluate when to use third-party libraries and when to write custom code—avoiding reinventing the wheel, and reducing maintenance effort and technical debt.

Common Questions

What is Clean Architecture? How is it different from traditional architectures?

Clean Architecture is an architectural pattern that emphasizes dependency inversion and layer separation. Compared with traditional architectures, its core difference is that business logic resides in the inner layers and does not depend on outer frameworks, databases, or UI. This makes code easier to test, maintain, and extend. Traditional architectures often tightly couple business logic with frameworks or databases, making modifications and testing difficult.

How do I apply Domain-Driven Design (DDD) in a project?

Applying DDD starts with these steps: first, identify the core concepts of the business domain and bounded contexts; then communicate and model using a consistent domain language; next, encapsulate business logic in domain entities; finally, ensure the infrastructure layer (databases, external services) does not intrude into the domain layer. This skill provides concrete naming conventions and layered guidance to help practice DDD principles.

When should I use third-party libraries, and when should I write my own code?

Prefer existing third-party libraries and solutions, especially for common capabilities (such as authentication, state management, and form validation). Only consider custom code when any of the following applies: it involves specific business logic, there are special performance requirements, existing solutions cannot meet needs, or security sensitivity requires full control. Every line of custom code carries maintenance cost—so it must be evaluated carefully.