java-architect

Q: How do I install java-architect?

Run npx skills add https://github.com/jeffallan/claude-skills --skill java-architect in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/java-architect/ (personal) or .claude/skills/java-architect/ (project).

by jeffallanBackend & APIs

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.

Installs: 6K
Last 24h: +31
Trending rank: #4297
Security: Fail

Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/jeffallan/claude-skills --skill java-architect

01
Install
Run the command in your project. The CLI asks which agents to install for.
02
Describe the task
Ask your agent for something this skill covers. It loads java-architect automatically when relevant.
03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.

Security audits

Independent scans of the skill's instructions and bundled files.

Gen Agent Trust Hub FailCRITICAL ·This skill provides a comprehensive and secure framework for developing enterprise Java applications with Spring Boot 3.x and Java 21. It adheres to architectural best practices, including proper security configurations, data access optimizations, and robust testing patterns. No malicious behavior or high-risk patterns were detected in the instructions or reference materials.

Socket PassNo alerts

Snyk PassLOW ·Risk: LOW · No issues

Runlayer PassLOW ·1/6 files flagged

ZeroLeaks PassNONE ·Score: 93/100 · 2 sections analyzed

SKILL.md

The instructions your agent reads when the skill is triggered.

Java Architect

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

Core Workflow

Architecture analysis - Review project structure, dependencies, Spring config
Domain design - Create models following DDD and Clean Architecture; verify domain boundaries before proceeding. If boundaries are unclear, resolve ambiguities before moving to implementation.
Implementation - Build services with Spring Boot best practices
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.
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.
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

MUST DO

Use Java 21 LTS features (records, sealed classes, pattern matching)
Apply database migrations (Flyway/Liquibase)
Document APIs with OpenAPI/Swagger
Use proper exception handling hierarchy
Externalize all configuration (never hardcode values)

MUST NOT DO

Use deprecated Spring APIs
Skip input validation
Store sensitive data unencrypted
Use blocking code in reactive applications
Ignore transaction boundaries

Output Templates

When implementing Java features, provide:

Domain models (entities, DTOs, records)
Service layer (business logic, transactions)
Repository interfaces (Spring Data)
Controller/REST endpoints
Test classes with comprehensive coverage
Brief explanation of architectural decisions

Code Examples

Minimal WebFlux REST Endpoint

@RestController
@RequestMapping("/api/v1/orders")
@RequiredArgsConstructor
public class OrderController {

    private final OrderService orderService;

    @GetMapping("/{id}")
    public Mono<ResponseEntity<OrderDto>> getOrder(@PathVariable UUID id) {
        return orderService.findById(id)
                .map(ResponseEntity::ok)
                .defaultIfEmpty(ResponseEntity.notFound().build());
    }

    @PostMapping
    @ResponseStatus(HttpStatus.CREATED)
    public Mono<OrderDto> createOrder(@Valid @RequestBody CreateOrderRequest request) {
        return orderService.create(request);
    }
}

JPA Repository with Optimized Query

public interface OrderRepository extends JpaRepository<Order, UUID> {

    // Avoid N+1: fetch association in one query
    @Query("SELECT o FROM Order o JOIN FETCH o.items WHERE o.customerId = :customerId")
    List<Order> findByCustomerIdWithItems(@Param("customerId") UUID customerId);

    // Projection to limit fetched columns
    @Query("SELECT new com.example.dto.OrderSummary(o.id, o.status, o.total) FROM Order o WHERE o.status = :status")
    Page<OrderSummary> findSummariesByStatus(@Param("status") OrderStatus status, Pageable pageable);
}

Spring Security OAuth2 JWT Configuration

@Configuration
@EnableMethodSecurity
public class SecurityConfig {

    @Bean
    public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
        return http
                .csrf(AbstractHttpConfigurer::disable)
                .sessionManagement(s -> s.sessionCreationPolicy(STATELESS))
                .authorizeHttpRequests(auth -> auth
                        .requestMatchers("/actuator/health").permitAll()
                        .anyRequest().authenticated())
                .oauth2ResourceServer(oauth2 -> oauth2.jwt(Customizer.withDefaults()))
                .build();
    }
}

Knowledge Reference

Spring Boot 3.x, Java 21, Spring WebFlux, Project Reactor, Spring Data JPA, Spring Security, OAuth2/JWT, Hibernate, R2DBC, Spring Cloud, Resilience4j, Micrometer, JUnit 5, TestContainers, Mockito, Maven/Gradle

Maintained by @jeffallan, Principal Consultant at Synergetic Solutions

Documentation

FAQ

What does the java-architect skill do?

How do I install java-architect?

Run npx skills add https://github.com/jeffallan/claude-skills --skill java-architect in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/java-architect/ (personal) or .claude/skills/java-architect/ (project).

Which AI agents can use java-architect?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is java-architect safe to install?

Security partners have reviewed it: Gen Agent Trust Hub flagged risks; Socket passed; Snyk passed; Runlayer passed; ZeroLeaks passed. As with any skill, read the SKILL.md and bundled scripts before installing.

Who maintains java-architect?

It is published by jeffallan in jeffallan/claude-skills. It has 5,988 recorded installs.

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java-architect

Install

Install

Describe the task

Review the result

Security audits

SKILL.md

Java Architect

Core Workflow

Reference Guide

Constraints

MUST DO

MUST NOT DO

Output Templates

Code Examples

Minimal WebFlux REST Endpoint

JPA Repository with Optimized Query

Spring Security OAuth2 JWT Configuration

Knowledge Reference

FAQ

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