kotlin-cross-cutting

Apply when creating, refactoring, changing, planning (plan mode) or reviewing any file that is a Spring configuration class, bean definition, dependency injection wiring, or configuration properties binding.

Apply when creating, refactoring, changing, planning (plan mode) or reviewing any code that uses Arrow's Either type for error handling. This includes adding, modifying, or fixing Either return types, sealed error classes, either {} builders, .bind() calls, fold() mappings, or Left/Right handling in any part of the code.

Apply when creating, refactoring, changing, planning (plan mode) or reviewing any code that handles errors using exceptions. This includes adding, modifying, or fixing custom exception classes, DomainException hierarchies, GlobalExceptionHandler, @ExceptionHandler methods, exception propagation, or error code mappings.

Apply only when explicitly reviewing or auditing Kotlin code for readability, maintainability, or clean code practices. This includes code review requests, naming reviews, refactoring for clarity, reducing nesting, or evaluating scope function usage.

Apply when creating, refactoring, changing, planning (plan mode) or reviewing any Flyway migration file, SQL schema change, or database table modification.

Apply when creating, refactoring, changing, planning (plan mode) or reviewing any test file or test class. This includes adding, modifying, or fixing unit tests, integration tests, component tests, test fixtures, mocking setup (mockk), assertions (kotest), TestContainers configuration, WireMock stubs, or @WebMvcTest/@SpringBootTest setups.