skill-creator

by anthropics 167k No license Updated Jul 24, 2026
Testing ⚠ No license
skill-creator skill by anthropics
skill-creator — Testing skill by anthropics

skill-creator is an open-source testing skill for Claude Code and compatible agents, published by anthropics. Its author describes it as: “Create new skills, modify and improve existing skills, and measure skill performance. Use when users want to create a skill from scratch, edit, or optimize an existing skill, run evals to test a skill, benchmark skill…”. The project has 167k stars on GitHub and does not declare a license, so check with the author before reuse. Add it to your setup with `/plugin marketplace add anthropics/skills`.

Installation

Add skill-creator to your agent with:

/plugin marketplace add anthropics/skills

Always review a skill's source before installing it. This command comes from the skill's public repository; the linked repo is the source of truth for exact setup steps.

When to use it

Reach for skill-creator when you want testing help from your agent without writing the same instructions every session. Load the skill and the agent picks it up automatically for relevant tasks.

Strengths

  • Ships in anthropics/skills, an established project with 166,577 GitHub stars
  • Actively maintained (recent commits)

Things to check

  • No license declared — confirm terms with the author before reuse

Topics

agent-skills

Frequently asked questions

What does skill-creator do?
Create new skills, modify and improve existing skills, and measure skill performance. Use when users want to create a skill from scratch, edit, or optimize an existing skill, run evals to test a skill, benchmark skill performance with variance analysis, or optimize a skill's description for better triggering accuracy.
How do I install skill-creator?
Run /plugin marketplace add anthropics/skills in your agent, then reload your skills. Review the source at https://github.com/anthropics/skills before installing.
Is skill-creator free to use?
skill-creator is publicly available on GitHub, but anthropics has not declared a standard open-source license (No license). Confirm the terms with the author before reusing it.
Where does skill-creator come from?
skill-creator ships inside anthropics/skills, a repository that contains 19 catalogued skills in total. The repository's 166,577 GitHub stars apply to that whole collection, not to this skill on its own.

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