# Skill-Creator: Anthropic's Official "Meta-Skill" to Teach You Write Evaluable Agent Skills from Scratch

skill-creator is an Agent Skill "meta-skill" in Anthropic's open-source repository, specifically designed to guide developers in creating, testing and iterating on SKILL.md. This article introduces its core capabilities: structured creation workflow, Skill directory specifications, eval evaluation and benchmark testing, description trigger optimization, as well as the installation and activation methods in tools such as Claude Code and Cursor. If you plan to systematically get started with Agent Skills, or already have a Skill but encounter inaccurate triggering or unstable output, skill-creator provides a complete closed loop from drafting to packaging, making it one of the most worthwhile skills to install first in the Skill ecosystem.