Can I use this for both plugin and user-level commands?

Absolutely. It recognizes the context and appropriately evaluates specific requirements like ${CLAUDE_PLUGIN_ROOT} for plugin-based commands.

Will it help me fix poorly written commands?

Yes. If a command scores a 'B' grade or lower, the skill automatically generates a suggested revision that corrects the identified issues.

Is the validation based on official Claude Code docs?

Yes, the checklist is derived directly from official Claude Code documentation and the standard skill development patterns used by the core team.

Which criteria does the skill use for evaluation?

The validator checks four main areas: Frontmatter (25 pts), Body Structure (25 pts), Dynamic Features like $ARGUMENTS (25 pts), and Stability/Error Handling (25 pts).

What does the Command Validator skill actually do?

It analyzes your Claude Code custom command markdown files and provides a detailed report based on official best practices, scoring them out of 100.

Command Validator

Name: Command Validator
Author: wonjiko

bywonjiko

•

Developer Tools

Validates and scores Claude Code custom commands against official documentation and best practices.

The Command Validator is a specialized utility designed to audit and optimize Claude Code custom commands stored as markdown files. It evaluates your scripts against four critical pillars: Frontmatter quality, agent-oriented structure, dynamic feature utilization, and error-handling stability. By providing a standardized 100-point score and a letter grade (S to D), this skill helps developers ensure their automation tools are efficient, secure, and compliant with the latest Claude Code standards. It even provides an improved version of your command if it falls below optimal quality thresholds.

Key Features

01Validation of dynamic features like $ARGUMENTS, @file, and bash execution

02Security and stability checks for error handling and destructive actions

03Instant generation of optimized command versions for low-scoring files

041 GitHub stars

05Automated scoring based on official Claude Code documentation

06Comprehensive frontmatter audit for tool mapping and descriptions

Use Cases

01Refactoring legacy automation scripts to follow new best practices

02Standardizing command quality across a collaborative development team

03Pre-deployment auditing of custom Claude Code commands

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add wonjiko/claude-toymarket command-validator

For use in Claude.ai and ChatGPT

Download Skill