solid-java

Enforce SOLID design principles for Java 21+ applications with modular architecture.

22|3|Updated Jan 10, 2026
One-click install
npx skills add https://github.com/fusengine/agents --skill solid-java
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: solid-java
Source: https://github.com/fusengine/agents/tree/main/plugins/solid/skills/solid-java
Command: npx skills add https://github.com/fusengine/agents --skill solid-java

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill enforces SOLID principles for Java 21+ projects, ensuring maintainable, scalable, and robust code through modular architecture, strict file size limits, and interface segregation.

Core Features & Use Cases

  • Modular Design: Enforces a strict modules/[feature]/ structure, preventing flat src/ layouts.
  • File Size Enforcement: Limits files to 100 lines, promoting single responsibility.
  • Interface Segregation: Mandates interfaces in dedicated interfaces/ directories.
  • Use Case: Refactor a monolithic Java application into a modular, SOLID-compliant architecture, improving code quality and developer productivity.

Quick Start

Apply SOLID principles to the Java 21+ project by structuring it into modules and adhering to file size limits.

Frequently Asked Questions about solid-java

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I enforce SOLID design principles in a Java 21+ project?▼

Enforce SOLID principles in Java 21+ by adopting a modular architecture with a strict modules/[feature]/ structure, limiting file sizes to 100 lines, and using dedicated interface directories for dependency inversion.

What is the best way to refactor a monolithic Java application into modular architecture?▼

Refactor a monolithic Java application by enforcing a modular modules/[feature]/ structure, applying strict 100-line file size limits, and mandating interface segregation through dedicated directories to improve scalability and maintainability.

How does interface segregation work with Java dependency inversion?▼

Interface segregation works with Java dependency inversion by mandating interfaces in dedicated interfaces/ directories and applying constructor injection, ensuring modules depend on abstractions rather than concrete implementations.

Can I use this modular architecture approach for existing Java codebases?▼

Yes, you can apply this modular architecture to existing Java codebases by refactoring flat src/ layouts into modules/[feature]/ structures and enforcing strict 100-line file size limits to achieve SOLID compliance.

Why does my Java project need a strict 100-line file size limit?▼

A strict 100-line file size limit promotes the single responsibility principle by forcing developers to break down large classes, resulting in maintainable, scalable, and robust Java 21+ code.

When should I avoid enforcing strict modularity in Java applications?▼

Avoid enforcing strict modularity and 100-line file size limits for small Java scripts or prototypes where setup overhead outweighs maintainability benefits, as this approach targets scalable object-oriented applications.