What is a Claude Code Skill?

A Claude Code skill is a specialized folder containing instructions (SKILL.md) and resources that extend Claude's behavior for specific tasks. Unlike slash commands, skills are model-invoked based on context.

Can I restrict Claude's tool access for specific skills?

Yes, by using the 'allowed-tools' property in the YAML frontmatter, you can limit Claude to specific actions like 'Read' or 'Grep', which is ideal for safety-critical or read-only workflows.

How does Claude decide when to activate a skill?

Claude uses the 'description' field in the skill's YAML frontmatter. To ensure activation, you must include specific trigger keywords that a user is likely to mention in their prompt.

What is the recommended size for a SKILL.md file?

To preserve the context window, it is best to keep SKILL.md under 500 lines. For more extensive documentation, use supporting files and reference them within the main skill file.

Where should I store my custom Claude skills?

You can store them in ~/.claude/skills/ for personal use across all projects, or in .claude/skills/ within a specific repository to share them with your team via Git.

Claude Skill Creator

Name: Claude Skill Creator
Author: IKcoding-jp

byIKcoding-jp

0•

開発者ツール

Facilitates the development of custom Claude Code skills by providing structured templates, best practices, and validation guides.

The Claude Skill Creator is a specialized meta-skill designed to help developers build, update, and optimize custom capabilities for the Claude Code CLI. It provides a comprehensive framework for creating skill directories, writing essential YAML frontmatter, and structuring SKILL.md files to ensure Claude can effectively activate and execute domain-specific tasks. By following this guide, developers can ensure their custom extensions are trigger-rich, context-efficient, and adhere to AI interaction best practices, whether for personal workflows or shared team projects.

主な機能

01Guidance on personal, project, and plugin directory structures

02Instructional framework for defining trigger-rich skill descriptions

03Standardized SKILL.md templates with required YAML frontmatter

04Support for tool restrictions and supporting resource organization

050 GitHub stars

06Best practices for context window management and token efficiency

ユースケース

01Converting internal team documentation into model-invoked AI skills

02Scaffolding a new custom capability for a specific project workflow

03Troubleshooting skill activation issues by refining keyword descriptions

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add ikcoding-jp/roast-plus claude-skill-creator

For use in Claude.ai and ChatGPT

Download Skill