Skill Creator

This is the skill for creating skills. If you're building a custom skill for Claude, this walks you through the structure: the required SKILL.md with frontmatter and instructions, optional bundled resources like scripts and reference docs, and the progressive disclosure model that keeps context lean. The core advice is ruthlessly practical: assume Claude is already smart, only add what it genuinely needs, and use the three-level loading system (metadata, skill body, resources) to avoid bloating the context window. It covers when to use scripts versus text instructions, how to organize reference materials, and why you shouldn't create auxiliary documentation files. Worth reading if you're writing your first skill or wondering why yours keeps getting skipped.

skills.sh installs: 1.4K
GitHub stars: 19.5K
last updated: Aug 21, 2026

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Install

$ npx -y skills add vercel-labs/json-render --skill skill-creator --agent claude-code

Installs into .claude/skills of the current project.

Files

Skill Creator

This skill provides guidance for creating effective skills.

About Skills

Skills are modular, self-contained packages that extend Claude's capabilities by providing specialized knowledge, workflows, and tools. Think of them as "onboarding guides" for specific domains or tasks—they transform Claude from a general-purpose agent into a specialized agent equipped with procedural knowledge that no model can fully possess.

What Skills Provide

Specialized workflows - Multi-step procedures for specific domains
Tool integrations - Instructions for working with specific file formats or APIs
Domain expertise - Company-specific knowledge, schemas, business logic
Bundled resources - Scripts, references, and assets for complex and repetitive tasks

Core Principles

Concise is Key

The context window is a public good. Skills share the context window with everything else Claude needs: system prompt, conversation history, other Skills' metadata, and the actual user request.

SKILL.md on GitHub