Java developer toolkit for Claude Code — skills, agents, hooks, and coding standards for Java 8+ projects
Skill Claude CodeCodex
Creates, lists, and manages Architecture Decision Records for Java projects. Use when user asks to "create an ADR", "document this decision", "write an architecture decision", "add ADR", "list decisions", "show ADRs", or "record this architectural choice".
Skill Claude CodeCodex
Reviews Java REST API design including HTTP methods, status codes, naming, and versioning. Use when user asks to "review my API", "check REST design", "is this good REST", "review endpoints", "API design review", "check my controller", or "review HTTP API".
Skill Claude CodeCodex
Reviews or implements Clean Architecture / Hexagonal Architecture (Ports & Adapters) and DDD tactical patterns for Java projects. Use when user asks to "apply clean architecture", "implement hexagonal architecture", "add ports and adapters", "apply DDD", "refactor to clean arch", "review architecture", or "add value…
Skill Claude CodeCodex
Generates a Conventional Commits message for staged Java changes. Use when user asks to "write a commit message", "help me commit", "what should my commit say", "summarize my changes", "draft a commit", or "create commit message".
Skill Claude CodeCodex
Reviews Java code for thread safety, race conditions, deadlocks, and Java 21 virtual thread compatibility. Use when user asks to "review concurrency", "is this thread safe", "check for race conditions", "concurrency issues", or "virtual thread compatible".
Skill Claude CodeCodex
Detects GoF patterns in Java code or recommends the right pattern for a problem. Use when user asks to "what pattern is this", "detect design patterns", "suggest a pattern", "should I use factory", "which design pattern", or "recommend a pattern for".
Skill Claude CodeCodex
Generates Javadoc comments for Java classes and methods. Use when user asks to "add javadoc", "document this class", "write documentation", "add comments", "generate docs", or "document this method".
Skill Claude CodeCodex
Explains Java code in plain language including design patterns. Use when user asks to "explain this code", "what does this do", "help me understand", "walk me through this", or "how does this work".
Skill Claude CodeCodex
Diagnoses and fixes Java compile errors, runtime exceptions, and stack traces. Use when user asks to "fix this error", "this won't compile", "I'm getting an exception", "debug this", or "build is failing".
Skill Claude CodeCodex
Runs a holistic code health check scoring Security, Tests, Performance and Quality with A-F grades. Use when user asks to "check health", "score this project", "health check", "how good is this code", "overall assessment", or "code quality score".
Skill Claude CodeCodex
Interactive Java version upgrade guide (8 to 11, 11 to 17, 17 to 21). Use when user asks to "migrate to Java 17", "upgrade to Java 21", "Java migration guide", "move from Java 11 to 17", or "what changed in Java 21".
Skill Claude CodeCodex
Suggests and applies version-gated Java refactorings. Use when user asks to "refactor this", "clean up this code", "modernize this Java", "simplify this", "extract method", "improve this class", or "make this more idiomatic".
Skill Claude CodeCodex
Reviews Java code for bugs, naming issues, code smells, and version-appropriate idioms. Use when user asks to "review this code", "check my Java", "look at this class", "find issues in", "code review", "what's wrong with this", or "review this file".
Skill Claude CodeCodex
Checks Java code for SOLID principles violations with Java-specific patterns. Use when user asks to "check SOLID principles", "is this good OOP", "single responsibility", "SOLID violations", "open closed principle", or "dependency inversion".
Skill Claude CodeCodex
Quick Java performance scan flagging N+1 queries, memory issues, threading problems, and algorithmic hotspots. Use when user asks to "check performance", "performance scan", "any N+1 queries", "performance issues", "is this efficient", or "slow code".
Skill Claude CodeCodex
Quick OWASP security scan for injection risks, hardcoded secrets, weak crypto, and Spring Security misconfigs. Use when user asks to "security scan", "check for vulnerabilities", "any security issues", "OWASP check", "hardcoded secrets", or "is this secure".
Skill Claude CodeCodex
Generates JUnit 5 and Mockito unit tests or Testcontainers integration tests, auto-detecting project setup. Use when user asks to "write tests", "generate tests", "add unit tests", "create test class", "test this service", or "write integration tests".
Skill Claude CodeCodex
Use when the user asks to add caching, configure Redis or Caffeine cache, use @Cacheable/@CacheEvict/@CachePut, optimize repeated database or API calls, or review existing Spring Boot cache configuration.
Skill Claude CodeCodex
Generates a complete Spring Boot CRUD feature (entity, repository, service, controller, DTOs, tests) in an existing project. Use when user asks to "add CRUD for", "generate entity", "create a feature for", "add REST endpoints for", "scaffold a feature", or "build CRUD for".
Skill Claude CodeCodex
Reviews Spring Data JPA for N+1 queries, fetch strategies, projections, and Specifications. Use when user asks to "review JPA", "check for N+1", "JPA performance", "review my entities", "check fetch strategy", or "review my repositories".
Skill Claude CodeCodex
Reviews Java logging for SLF4J best practices, MDC context, structured logging, and PII safety. Use when user asks to "review logging", "check my logs", "logging review", "is my logging correct", "MDC setup", or "check for PII in logs".
Skill Claude CodeCodex
Generates or reviews OpenAPI / Swagger documentation for Spring Boot REST APIs — adds @Operation, @Schema, @ApiResponse annotations and configures Swagger UI. Use when user asks to "add Swagger", "document this API", "generate OpenAPI spec", "add @Operation annotations", "set up Swagger UI", or "document endpoints".
Skill Claude CodeCodex
Use when the user asks to add resilience patterns, handle service failures, implement circuit breaker, retry, rate limiter, bulkhead, or timeout in a Spring Boot project using Resilience4J.
Skill Claude CodeCodex
Scaffolds a brand-new Spring Boot project from scratch — build file, package structure, and a starter feature. Use when user asks to "create a new Spring Boot project", "bootstrap a project", "start a new project", "generate a new app", or "scaffold a new service".