piomin

Spring Boot 4.x development - REST APIs, JPA, Security, Testing, and Cloud-native patterns. Use for building enterprise Java applications with Spring Boot.

Comprehensive code review for Java - clean code principles, API contracts, null safety, exception handling, and performance. Use when user says "review code", "refactor", "check API", or before merging changes.

Spring Boot project conventions and mandatory rules. Auto-loads when working with Spring Boot, Java, or Maven projects. Enforces No-Lombok, constructor injection, RestClient, and other standards.

Design patterns with Java examples - classic (Factory, Builder, Strategy, Observer, Decorator, Adapter) and enterprise/microservices (Saga, Outbox, CQRS). Use when user asks about patterns, designing extensible components, or distributed transaction…

Java 21+ features for Spring Boot - records, sealed classes, pattern matching, virtual threads, text blocks. Use when user asks about modern Java, Java 21 features, or when modernizing existing code.

JPA/Hibernate patterns and common pitfalls (N+1, lazy loading, transactions, queries). Use when user has JPA performance issues, LazyInitializationException, or asks about entity relationships and fetching strategies.

Java logging best practices with SLF4J, structured logging (JSON), and MDC for request tracing. Includes AI-friendly log formats for Claude Code debugging. Use when user asks about logging, debugging application flow, or analyzing logs.

Testing patterns for Spring Boot - JUnit 5, Mockito, MockMvc, Testcontainers, positive and negative test cases. Use when user asks about testing, writing tests, test coverage, or test failures.

Review REST API contracts for HTTP semantics, versioning, backward compatibility, and response consistency. Use when user asks "review API", "check endpoints", "REST review", or before releasing API changes.

Clean Code principles (DRY, KISS, YAGNI), naming conventions, function design, and refactoring. Use when user says "clean this code", "refactor", "improve readability", or when reviewing code quality.

Common design patterns with Java examples (Factory, Builder, Strategy, Observer, Decorator, etc.). Use when user asks "implement pattern", "use factory", "strategy pattern", or when designing extensible components.

Systematic code review for Java with null safety, exception handling, concurrency, and performance checks. Use when user says "review code", "check this PR", "code review", or before merging changes.

Guide for upgrading Java projects between major versions (8→11→17→21→25). Use when user says "upgrade Java", "migrate to Java 25", "update Java version", or when modernizing legacy projects.

JPA/Hibernate patterns and common pitfalls (N+1, lazy loading, transactions, queries). Use when user has JPA performance issues, LazyInitializationException, or asks about entity relationships and fetching strategies.

Java logging best practices with SLF4J, structured logging (JSON), and MDC for request tracing. Includes AI-friendly log formats for Claude Code debugging. Use when user asks about logging, debugging application flow, or analyzing logs.

Spring Boot best practices and patterns. Use when creating controllers, services, repositories, or when user asks about Spring Boot architecture, REST APIs, exception handling, or JPA patterns.

JPA/Hibernate patterns and common pitfalls (N+1, lazy loading, transactions, queries) for Quarkus/Panache. Use when user has JPA performance issues, LazyInitializationException, or asks about entity relationships and fetching strategies.

Quarkus development - REST APIs, Panache, Security, Testing, and Cloud-native patterns. Use for building enterprise Java applications with Quarkus.

Testing patterns for Quarkus - @QuarkusTest, RestAssured, Mockito mocking, Dev Services (built-in Testcontainers), and @QuarkusIntegrationTest. Use when user asks about testing, writing tests, test coverage, or test failures.

Comprehensive code review for Java - clean code principles, API contracts, null safety, exception handling, and performance. Use when user says "review code", "refactor", "check API", or before merging changes.

Design patterns with Java examples - classic (Factory, Builder, Strategy, Observer, Decorator, Adapter) and enterprise/microservices (Saga, Outbox, CQRS). Use when user asks about patterns, designing extensible components, or distributed transaction…

Java 21+ features for Quarkus - records, sealed classes, pattern matching, virtual threads, text blocks. Use when user asks about modern Java, Java 21 features, or when modernizing existing code.

Java logging best practices with SLF4J/JBoss Logging, structured logging (JSON), and MDC for request tracing in Quarkus. Includes AI-friendly log formats for Claude Code debugging. Use when user asks about logging, debugging application flow, or analyzing…

Comprehensive code review for Java - clean code principles, API contracts, null safety, exception handling, and performance. Use when user says "review code", "refactor", "check API", or before merging changes.

Common design patterns with Java examples (Factory, Builder, Strategy, Observer, Decorator, etc.). Use when user asks "implement pattern", "use factory", "strategy pattern", or when designing extensible components.

JPA/Hibernate patterns and common pitfalls (N+1, lazy loading, transactions, queries). Use when user has JPA performance issues, LazyInitializationException, or asks about entity relationships and fetching strategies.

Java logging best practices with SLF4J, structured logging (JSON), and MDC for request tracing. Includes AI-friendly log formats for Claude Code debugging. Use when user asks about logging, debugging application flow, or analyzing logs.

Spring Boot 3.x development - REST APIs, JPA, Security, Testing, and Cloud-native patterns. Use for building enterprise Java applications with Spring Boot.

Create Spring Boot Kotlin Project Skeleton

Toolkit for interacting with and testing local web applications using Playwright. Supports verifying frontend functionality, debugging UI behavior, capturing browser screenshots, and viewing browser logs.

Build Spring Boot 4.x applications following the best practices. Use these guidelines when developing Spring Boot applications that use Spring MVC, Spring Data JPA, Spring Modulith, Spring Security. Use these guidelines to create recommended Spring Boot…