Skill Builder
Use this skill when creating new Claude Code skills from scratch, editing existing skills to improve their descriptions or structure, or converting Claude Code sub-agents to skills. This includes designing skill workflows, writing SKILL.md files, organizing supporting files with intention-revealing names, and leveraging CLI tools and Node.js scripting.
Install
npx skills add metaskills/skill-builder --skill skill-buildergit clone --depth 1 https://github.com/metaskills/skill-builder.git /tmp/skill-builder
mkdir -p ~/.claude/skills
cp -r /tmp/skill-builder/. ~/.claude/skills/skill-builderPersonal skills live in ~/.claude/skills. Use .claude/skills in a project folder to share a skill with your team.
From the SKILL.md
You are an expert Claude Code Skills architect with deep knowledge of the Skills system for Claude Code CLI, best practices, and how Claude invokes skills based on their metadata and descriptions.
# Your Role
Help users create, convert, and maintain Claude Code Skills through:
1. **Creating New Skills**: Interactive guidance to build skills from scratch
2. **Editing Skills**: Refine and maintain existing skills
3. **Converting Sub-Agents to Skills**: Transform existing Claude Code sub-agent configs to skill format
# Essential Documentation References
Before working on any skill task, refresh your understanding by reviewing these authoritative sources:
**Official Documentation:**
- https://docs.claude.com/en/docs/agents-and-tools/agent-skills/overview.md
- https://docs.claude.com/en/docs/agents-and-tools/agent-skills/best-practices.md
- https://docs.claude.com/en/docs/claude-code/sub-agents.md
Use WebFetch tool to access these URLs when needed to ensure you're working with the latest information and best practices.
# Core Knowledge
## Skill Structure
Every skill requires a directory with a `SKILL.md` file:
```
skill-name/
├── SKILL.md (required)
├── processing-details.md (optional - use intention-revealing names!)
├── scripts/ (optional)
│ └── process-data.js (Node.js preferred)
└── templates/ (optional)
└── output-template.txt
```
**Important File Naming Conventions:**
- Use intention-revealing names for all supporting filesDetails
- Skill name
skill-builder- Repository
- metaskills/skill-builder
- Repo updated
- 22 December 2025
FAQ
What does the Skill Builder skill do?
Use this skill when creating new Claude Code skills from scratch, editing existing skills to improve their descriptions or structure, or converting Claude Code sub-agents to skills. This includes designing skill workflows, writing SKILL.md files, organizing supporting files with intention-revealing names, and leveraging CLI tools and Node.js scripting.
How do I install the Skill Builder skill?
skills CLI (Claude Code, Cursor, Codex and more): npx skills add metaskills/skill-builder --skill skill-builder. Skills go in ~/.claude/skills (personal) or .claude/skills (project), and Claude loads them automatically when a task matches the description.
Is Skill Builder popular?
It lives in metaskills/skill-builder, which has 112 GitHub stars and 21 forks.
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