How does it know where to put the files?

The skill reads your project's existing package-info.java files and folder structure to ensure all generated code follows your established naming and packaging conventions.

Can I use it for both read and write operations?

Absolutely. It supports both the Command side (writes) including handlers and assemblers, and the Query side (reads) including query services and DTOs.

What architectural pattern does this skill follow?

This skill follows the Domain-Driven Design (DDD) pattern, specifically targeting the Application Layer to separate orchestration logic from domain and infrastructure concerns.

Does it support Spring Framework features?

Yes, it specifically supports Spring's @Transactional annotation for managing transaction boundaries within the application layer.

Will it generate tests for my code?

Yes, it automatically generates unit tests that validate orchestration order, port calls, and error mapping using mocks.

Java DDD App Use Case Generator

Name: Java DDD App Use Case Generator
Author: ryan-alexander-zhang

byryan-alexander-zhang

0•

API Development

Generates structured application-layer use cases including commands, queries, and handlers for Java DDD architectures.

The App Use Case Generator is a specialized skill for the Persimmon Java DDD scaffold designed to automate the creation of boilerplate code in the application layer. It streamlines the development of Command and Query flows by generating DTOs, Handlers, Assemblers, and Query Services that strictly follow project-specific package-info guidelines. The skill ensures architectural integrity by enforcing Spring transaction boundaries and preventing the leakage of persistence types into the application layer, while also providing ready-to-use unit tests for orchestration logic.

Key Features

01Creates Handlers and Query Services following DDD patterns

02Automates Spring @Transactional boundary implementation

03Generates unit tests with mock port validation

04Generates Command and Query DTOs with standardized naming

05Enforces packaging rules based on existing package-info.java files

060 GitHub stars

Use Cases

01Implementing new business operations with explicit transaction requirements

02Creating read-only query services and data transfer objects

03Scaffolding orchestration logic between domain ports and application services

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add ryan-alexander-zhang/persimmon app-usecase-generator

For use in Claude.ai and ChatGPT

Download Skill