# Java Architect

Use when building, configuring, or debugging enterprise Java applications with Spring...

- Repository: https://github.com/Jeffallan/claude-skills (12164 stars)
- Category: Testing
- License: MIT
- Last updated: 2026-10-30
- Runs scripts: no, instructions only

## Install

Claude Code: `npx skills add Jeffallan/claude-skills --skill java-architect -g -a claude-code -y`
Codex: `npx skills add Jeffallan/claude-skills --skill java-architect -g -a codex -y`
Cursor: `npx skills add Jeffallan/claude-skills --skill java-architect -g -a cursor -y`
Gemini CLI: `npx skills add Jeffallan/claude-skills --skill java-architect -g -a gemini-cli -y`
Claude Code plugin marketplace: `/plugin marketplace add Jeffallan/claude-skills`

## Description

Use when building, configuring, or debugging enterprise Java applications with Spring Boot 3.x, microservices, or reactive programming. Invoke to implement WebFlux endpoints, optimize JPA queries and database performance, configure Spring Security with OAuth2/JWT, or resolve authentication issues and async processing challenges in cloud-native Spring applications.

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

# Java Architect

Enterprise Java specialist focused on Spring Boot 3.x, microservices architecture, and cloud-native development using Java 21 LTS.

## Core Workflow

1. **Architecture analysis** - Review project structure, dependencies, Spring config
2. **Domain design** - Create models following DDD and Clean Architecture; verify domain boundaries before proceeding. If boundaries are unclear, resolve ambiguities before moving to implementation.
3. **Implementation** - Build services with Spring Boot best practices
4. **Data layer** - Optimize JPA queries, implement repositories; run `./mvnw verify -pl <module>` to confirm query correctness. If integration tests fail: review Hibernate SQL logs, fix queries or mappings, re-run before proceeding.
5. **Security & config** - Apply Spring Security, externalize configuration, add observability; run `./mvnw verify` after security changes to confirm filter chain and JWT wiring. If tests fail: check `SecurityFilterChain` bean order and token validation config, then re-run.
6. **Quality assurance** - Run `./mvnw verify` (Maven) or `./gradlew check` (Gradle) to confirm all tests pass and coverage reaches 85%+ before closing. If coverage is below threshold: identify untested branches via JaCoCo report (`target/site/jacoco/index.html`), add missing test cases, re-run.

## Reference Guide

Load detailed guidance based on context:

| Topic | Reference | Load When |
|-------|-----------|-----------|
| Spring Boot | `references/spring-boot-setup.md` | Project setup, configuration, starters |
| Reactive | `references/reactive-webflux.md` | WebFlux, Project Reactor, R2DBC |
| Data Access | `references/jpa-optimization.md` | JPA, Hibernate, query tuning |
| Security | `references/spring-security.md` | OAuth2, JWT, method security |
| Testing | `references/testing-patterns.md` | JUnit 5, TestContainers, Mockito |

## Constraints

The rest: https://github.com/Jeffallan/claude-skills/blob/HEAD/skills/java-architect/SKILL.md