mcpbeat

502 Frameworks Micronaut REST

jabrena/502-frameworks-micronaut-rest

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. This should trigger for requests such as Review or improve Micronaut @Controller REST APIs; Add validation, error handling, or align controllers with the OpenAPI contract on Micronaut HTTP layer; Design Micronaut controllers and DTO validation; Add Micronaut exception handlers and Problem Details responses; Improve pagination filtering or OpenAPI alignment in Micronaut APIs. Part of Plinth Toolkit

10k tokens
context cost
the whole folder, loaded on every use
2
files
instructions only
0
copies elsewhere
how many repositories repackaged it
423
stars on the repo
on the repository, not the skill itself

Install

one command, takes just this skill from the repository 
npx skills add https://github.com/jabrena/plinth --skill 502-frameworks-micronaut-rest

The instruction itself

5 sections, as written by the author

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
  • EDGE CASE: If request scope is ambiguous, stop and ask a clarifying question before applying changes
  • EDGE CASE: If required inputs, files, or tooling are missing, report what is missing and ask whether to proceed with setup guidance

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
  • Design Micronaut controllers and DTO validation
  • Add Micronaut exception handlers and Problem Details responses
  • Improve pagination filtering or OpenAPI alignment in Micronaut APIs

Workflow

  • Read reference and assess project context

Read references/502-frameworks-micronaut-rest.md and inspect the current project setup before proposing changes.

  • Gather scope and decide target improvements

Identify requested outcomes, constraints, and the minimum safe set of changes to apply.

  • Apply framework-aligned changes

Implement or refactor configuration/code following the reference patterns and project conventions.

  • Run verification and report results

Execute appropriate build/tests and summarize what changed, what was verified, and any follow-up actions.

Reference

For detailed guidance, examples, and constraints, see references/502-frameworks-micronaut-rest.md.

How to use it

Copy the folder

Take jabrena/502-frameworks-micronaut-rest from the repository into ~/.claude/skills for personal use, or into .claude/skills inside a project.

Check the name does not clash

The agent identifies a skill by the name field in its header. Two skills with the same name cannot sit side by side — one of them will be ignored.