springboot-skills-marketplace

Reviews Java 25 and Spring Boot 4 codebases, pull requests, files, and modules for migration risks, architecture boundary violations, JSpecify null-safety issues, security flaws, performance regressions, and Spring Data pitfalls. Use when the task is a concrete Java or Spring code review with code context. Do not use for Kotlin-only code, non-Spring frameworks, or generic review advice without files or diffs.

Creates Java 25 and Spring Boot 4 project structures, scaffolds, and implementation starting points for new services, REST APIs, and modular backends. Use when the task is to initialize a Spring Boot project, choose an architecture, select Spring Boot 4 features, or apply the bundled templates and references in this skill. Do not use for migrating existing projects or for isolated JPA/repository work without broader project-creation context.

Designs and implements Spring Data JPA repositories, projections, query patterns, custom repositories, CQRS read models, entity relationships, and persistence performance fixes for Java 25 and Spring Boot 4 projects. Use when the task needs repository-boundary decisions or concrete JPA implementation patterns from this skill. Do not use for generic SQL help or project-wide migration work that belongs in another skill.

Migrates Spring Boot applications to Boot 4 with Java 25, including related Spring Modulith 2 and Testcontainers 2 upgrade work. Use when the task is a concrete upgrade, dependency transition, starter rename, test-annotation migration, or phased migration plan. Do not use for greenfield project creation or for isolated repository design questions.