What specific errors does this skill contain?

The skill features an unclosed array in the 'allowed-tools' field and a string instead of an array in the 'prerequisites' field to trigger validation errors.

What is the purpose of the Bad Skill?

It is a deliberate test fixture used to verify that the Claude Code plugin system correctly identifies and handles malformed YAML frontmatter during the loading process.

Is this part of the official Claude Code toolkit?

It is part of the testing fixtures within the MadAppGang Claude Code plugin marketplace repository to ensure high-quality plugin validation.

Should I use this skill for actual coding tasks?

No, this skill is strictly for testing and debugging. It is designed to fail parsing and will not provide functional AI capabilities.

How do developers use this skill?

Developers include this skill in their automated test suites to ensure their infrastructure throws the appropriate exceptions when encountering invalid configurations.

Invalid Frontmatter Tester

Name: Invalid Frontmatter Tester
Author: MadAppGang

byMadAppGang

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230

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安全与测试

Provides a deliberately malformed configuration to test error handling and validation logic in Claude Code plugin loaders.

This skill serves as a specialized test fixture designed to evaluate how the Claude Code ecosystem handles invalid YAML frontmatter. By incorporating intentional syntax errors—such as unclosed array brackets and incorrect data types for prerequisites—it allows developers to verify that their plugin parsers and validation pipelines correctly identify, report, and manage configuration failures. It is an essential utility for contributors building robust plugin infrastructure who need to ensure that 'bad' skills do not compromise system stability.

主要功能

01Deliberately malformed YAML frontmatter for parser stress-testing

02Unclosed array bracket syntax in tool definitions

03230 GitHub stars

04Invalid data type validation for prerequisite fields

05Standardized test case for plugin integration suites

06Fail-safe verification for custom skill loaders

使用场景

01Validating frontmatter schema enforcement for new Claude Code skills

02Debugging plugin loading failures in a development environment

03Testing the error handling of a custom plugin parser

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add madappgang/claude-code bad-skill

For use in Claude.ai and ChatGPT

Download Skill