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Agent skill

503 Frameworks Micronaut Validation

by jabrena in jabrena/plinth

A skill your agent uses when you need to design, review, or improve validation in Micronaut applications — including Bean Validation on @Controller methods, @Body @Valid, query/path parameter…

Apache-2.0Auto-check passedBackend & APIs

Install 503 Frameworks Micronaut Validation

skills CLI
$ npx skills add jabrena/plinth --skill 503-frameworks-micronaut-validation -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install jabrena/plinth 503-frameworks-micronaut-validation --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/jabrena/plinth.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/503-frameworks-micronaut-validation .claude/skills/503-frameworks-micronaut-validation && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
503-frameworks-micronaut-validation
GitHub stars
447
Token cost
~692 tokens
SKILL.md length
236 words
Files
2 (incl. references)
Skills in repo
124
Repo updated
First seen
Licence
Apache-2.0

At a glance

A skill your agent uses when you need to design, review, or improve validation in Micronaut applications — including Bean Validation on @Controller methods, @Body @Valid, query/path parameter…

  • You need to design
  • SKILL.md covers Constraints, When to use this skill, Workflow and Reference
  • Calls mvn
  • Improve validation in Micronaut applications — including Bean Validation on @Controller methods

What it does

503 Frameworks Micronaut Validation is an agent skill from jabrena/plinth. Use when you need to design, review, or improve validation in Micronaut applications — including Bean Validation on @Controller methods, @Body @Valid, query/path parameter validation, @ConfigurationProperties validation, custom constraints, nested DTO validation, and ExceptionHandler mapping for constraint violations. This should trigger for requests such as Add validation support in Micronaut; Review Micronaut validation rules; Improve request validation in Micronaut REST APIs; Add custom validation constraints…

Its SKILL.md is about 690 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/503-frameworks-micronaut-validation.md`).

It sits in Backend & APIs, covering REST APIs and Design review and critique. The repository describes itself as: Plinth is an AI-native engineering toolkit for modern Java enterprise SDLC, built around reusable Commands, Agents, Skills, and MCP Servers. The licence is Apache-2.0.

When your agent uses it

  • You need to design
  • Improve validation in Micronaut applications — including Bean Validation on @Controller methods
  • Query/path parameter validation
  • @ConfigurationProperties validation

Example prompts

  • “/503-frameworks-micronaut-validation”

What it can do on your machine

Read from SKILL.md and the folder at commit dca88dc. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • mvn

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

503 Frameworks Micronaut Validation loads about 692 tokens when it runs, and up to ~3.1k if it reads all its reference files. Until then it costs about 159 tokens; SKILL.md has 236 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~159
When it runs · the whole SKILL.md, loaded when a task matches
~692
With references · SKILL.md plus every file in references/, read only if the agent opens them
~3.1k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from jabrena/plinth at commit dca88dc, republished under its Apache-2.0 licence (© jabrena). 236 words, ~692 tokens.

Download SKILL.mdSave it as .claude/skills/503-frameworks-micronaut-validation/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
503-frameworks-micronaut-validation
description
Use when you need to design, review, or improve validation in Micronaut applications — including Bean Validation on @Controller methods, @Body @Valid, query/path parameter validation, @ConfigurationProperties validation, custom constraints, nested DTO validation, and ExceptionHandler mapping for constraint violations. This should trigger for requests such as Add validation support in Micronaut; Review Micronaut validation rules; Improve request validation in Micronaut REST APIs; Add custom validation constraints in Micronaut; Validate Micronaut configuration properties. Part of Plinth Toolkit
license
Apache-2.0
metadata.author
Juan Antonio Breña Moral
metadata.version
0.19.0

Micronaut Validation Guidelines

Apply Micronaut validation best practices at HTTP API boundaries.

What is covered in this Skill?

  • Bean Validation annotations on DTOs and command models
  • @Valid / @Validated usage in Micronaut controllers
  • Validation groups and custom validators
  • Consistent mapping of validation failures to 400 responses
  • Safe and predictable validation error payloads

Scope: Apply recommendations based on the reference rules and good/bad examples.

Constraints

Before applying validation changes, ensure the project compiles. After improvements, run full verification.

  • 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

  • Add validation support in Micronaut
  • Review Micronaut validation rules
  • Improve request validation in Micronaut REST APIs
  • Add custom validation constraints in Micronaut
  • Validate Micronaut configuration properties
  • Improve constraint violation handling in Micronaut

Workflow

  1. Read reference and assess project context

Read references/503-frameworks-micronaut-validation.md and inspect the current project setup before proposing changes.

  1. Gather scope and decide target improvements

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

  1. Apply framework-aligned changes

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

  1. 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/503-frameworks-micronaut-validation.md.

© jabrena, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 1 other file (references) in skills/503-frameworks-micronaut-validation of jabrena/plinth.

  • SKILL.md
  • references/503-frameworks-micronaut-validation.md

Open the folder on GitHubat commit dca88dc

Compare with similar skills

503 Frameworks Micronaut Validation next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

503 Frameworks Micronaut Validation compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
503 Frameworks Micronaut Validation this skilljabrena/plinth447—~692Automated safety check: PassApache-2.0
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API Designepam/ai-dial-chat504—~1.2kAutomated safety check: PassApache-2.0
API Design AssistantArabelaTso/Skills-4-SE253—~2.7kAutomated safety check: PassApache-2.0
Paperclippaperclipai/paperclip99k—~9.6kAutomated safety check: PassMIT
Nodejs Backend Patternsever-works/ever-works16218 repos~4kAutomated safety check: PassAGPL-3.0

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Categories

Questions about 503 Frameworks Micronaut Validation

What does 503 Frameworks Micronaut Validation do?

A skill your agent uses when you need to design, review, or improve validation in Micronaut applications — including Bean Validation on @Controller methods, @Body @Valid, query/path parameter…. 503 Frameworks Micronaut Validation is an agent skill from jabrena/plinth. Use when you need to design, review, or improve validation in Micronaut applications — including Bean Validation on @Controller methods, @Body @Valid, query/path parameter validation, @ConfigurationProperties validation, custom constraints, nested DTO validation, and ExceptionHandler mapping for constraint violations.

When should I use 503 Frameworks Micronaut Validation?

503 Frameworks Micronaut Validation fits situations like: you need to design; improve validation in Micronaut applications — including Bean Validation on @Controller methods; query/path parameter validation; @ConfigurationProperties validation.

How do I install 503 Frameworks Micronaut Validation in Claude Code?

Run `npx skills add jabrena/plinth --skill 503-frameworks-micronaut-validation -a claude-code`. Or copy the skill folder (skills/503-frameworks-micronaut-validation in jabrena/plinth) into .claude/skills/503-frameworks-micronaut-validation in your project. Claude Code loads it when a task matches its description.

How do I install 503 Frameworks Micronaut Validation in Codex?

Run `npx skills add jabrena/plinth --skill 503-frameworks-micronaut-validation -a codex`. Or copy the skill folder (skills/503-frameworks-micronaut-validation in jabrena/plinth) into .agents/skills/503-frameworks-micronaut-validation in your project. Codex loads it when a task matches its description.

Can I use 503 Frameworks Micronaut Validation in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add jabrena/plinth --skill 503-frameworks-micronaut-validation -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/503-frameworks-micronaut-validation, .gemini/skills/503-frameworks-micronaut-validation, .github/skills/503-frameworks-micronaut-validation and .opencode/skills/503-frameworks-micronaut-validation in your project.

What does 503 Frameworks Micronaut Validation need to run?

Going by SKILL.md and its folder, 503 Frameworks Micronaut Validation needs the command-line tools its instructions call (mvn).

Does 503 Frameworks Micronaut Validation access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is 503 Frameworks Micronaut Validation safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does 503 Frameworks Micronaut Validation use?

503 Frameworks Micronaut Validation is published under the Apache-2.0 licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does 503 Frameworks Micronaut Validation use?

About 692 tokens (SKILL.md is roughly 2.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 2.4k tokens, read only when the agent opens those files.

What are the alternatives to 503 Frameworks Micronaut Validation?

Skills that share tags, products or a category with 503 Frameworks Micronaut Validation: API Design Reviewer (alirezarezvani/claude-skills, 28k stars), API Design (epam/ai-dial-chat, 504 stars), API Design Assistant (ArabelaTso/Skills-4-SE, 253 stars) and Paperclip (paperclipai/paperclip, 99k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains 503 Frameworks Micronaut Validation?

jabrena (a GitHub user) maintains it in jabrena/plinth, which has 447 GitHub stars. The repository holds 124 skills in this directory. The repository was last updated on October 7, 2026.

Source: jabrena/plinth on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.