java

Use when writing, designing, or refactoring Java code. Trigger for .java file creation or modification, domain modeling, concurrency code, or API design. NOT for test file writing (java:tester), code review (java:reviewer), or Spring Boot patterns (java:spring).

Use when reviewing Java code, auditing code quality, or checking architecture compliance. Trigger on explicit review requests, PR review commands (/review, "review this code"), or multi-file quality audits. NOT for generating new code or writing tests.

Use when writing, testing, or reviewing Spring Boot 4 code — controllers, services, repositories, security configuration, Spring test annotations (@WebMvcTest, @DataJpaTest, @SpringBootTest), ProblemDetail error handling, API versioning, or any Spring Framework 7 / Jakarta EE 11 patterns.

Use when applying TDD or writing test code. Trigger for *Test.java or *IT.java file creation/modification, explicit TDD workflow requests, test strategy decisions, or coverage analysis. NOT for writing production code (java:coder handles that).