502-frameworks-micronaut-rest: Скилл разработки REST API

--- name: 502-frameworks-micronaut-rest description: Use when you need to design, review, or improve REST APIs with Micronaut — including @Controller routes, HTTP status codes, DTOs, Bean Validation, exception handlers, pagination, idempotency, ETag/If-Match, caching headers, versioning, contract-first OpenAPI (OpenAPI Generator), optional runtime OpenAPI via micronaut-openapi, and security annotations. Part of the skills-for-java project license: Apache-2.0 metadata: author: Juan Antonio Breña Moral version: 0.13.0 --- # Micronaut REST API Guidelines Apply REST design principles for Micronaut HTTP applications. **What is covered in this Skill?** - Semantic HTTP with @Get/@Post/@Put/@Patch/@Delete and HttpResponse status control - Resource-oriented paths and stable DTO contracts - @Valid on request bodies with Bean Validation - Centralized error mapping (ExceptionHandler / problem JSON when applicable) - Pagination with Pageable and bounded sizes - OpenAPI contract file (API-first) and OpenAPI Generator for server stubs - Security annotations (@Secured) on sensitive routes - Idempotency-Key for retried writes - ETag / If-Match for optimistic concurrency - Cache-Control discipline - API versioning patterns - ISO-8601 time types in DTOs **Scope:** Apply recommendations based on the reference rules and good/bad code examples. ## Constraints Compile before REST refactors; verify after. - **MANDATORY**: Run `./mvnw compile` or `mvn compile` before applying any change - **SAFETY**: If compilation fails, stop immediately - **VERIFY**: Run `./mvnw clean verify` or `mvn clean verify` after applying improvements - **BEFORE APPLYING**: Read the reference for detailed rules and examples ## When to use this skill - Review or improve Micronaut @Controller REST APIs - Add validation, error handling, or align controllers with the OpenAPI contract on Micronaut HTTP layer ## Reference For detailed guidance, examples, and constraints, see [references/502-frameworks-micronaut-rest.md](references/502-frameworks-micronaut-rest.md).