Best Claude Skills for Java & JVM

Complete reference for building native modules and views with the Expo Modules API across Swift, Kotlin, and TypeScript.

Build applications with Google's Gemini models, supporting multimodal content, function calling, and structured outputs across Python, JavaScript, Go, and Java.

Comprehensive best practices guide for building production-ready Spring Boot applications.

Production-ready Spring Boot applications with REST APIs, security, data access, and monitoring.

JUnit 5 best practices for standard and data-driven unit testing with practical patterns.

Upgrades React Native apps to newer versions by applying rn-diff-purge template diffs, updating package.json dependencies, migrating native iOS and Android configuration, resolving CocoaPods and Gradle changes, and handling breaking API updates. Use when upgrading React Native, bumping RN version, updating from RN 0.x to 0.y, or migrating Expo SDK alongside a React Native upgrade.

Javadoc best practices for documenting Java types, methods, and members.

Spring Boot development patterns and idioms tailored for Kotlin applications.

Generate a Spring Boot 3.4.5 project skeleton with PostgreSQL, Redis, MongoDB, and Docker Compose.

Java method extraction refactoring for improved readability and maintainability.

Refactoring using Remove Parameter in Java Language

Generate production-ready MCP servers in Java with the official SDK, Maven or Gradle, and reactive streams.

Generate a Spring Boot Kotlin project skeleton with pre-configured databases and development services.

Automate GraalVM native image configuration, build, and error resolution for Java applications.

Generate production-ready Kotlin MCP server projects with Gradle, official SDK, and typed tools.

spring boot engineer

Spring Boot architecture patterns, REST API design, layered services, data access, caching, async processing, and logging. Use for Java Spring Boot backend work.

Spring Bootサービス向けのJavaコーディング標準：命名、不変性、Optional使用、ストリーム、例外、ジェネリクス、プロジェクトレイアウト。

Spring Security best practices for authn/authz, validation, CSRF, secrets, headers, rate limiting, and dependency security in Java Spring Boot services.

java architect

Test-driven development for Spring Boot using JUnit 5, Mockito, MockMvc, Testcontainers, and JaCoCo. Use when adding features, fixing bugs, or refactoring.

JPA/Hibernate patterns for entity design, relationships, query optimization, transactions, auditing, indexing, pagination, and pooling in Spring Boot.

kotlin specialist

Verification loop for Spring Boot projects: build, static analysis, tests with coverage, security scans, and diff review before release or PR.