Overview
skill-creator is an open-source testing skill for Claude Code and compatible agents, published by CherryHQ. 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 52k stars on GitHub and is available under the AGPL-3.0-only license. Add it to your setup with `git clone https://github.com/CherryHQ/cherry-studio ~/.claude/skills/skill-creator`.
What skill-creator does
You are running inside Cherry Studio. Skills live in a managed registry that Cherry keeps in sync with the filesystem automatically — there is **no** install or register tool to call, and you should **ignore** any `package_skill.py` / `.skill` packaging steps mentioned later in this file (they apply to Claude Code / Claude.ai, not here).
Best for
What’s inside
The SKILL.md for skill-creator is organised into these sections:
- Cherry Studio workflow (READ FIRST — overrides packaging / install steps below)
- Communicating with the user
- Creating a skill
- Capture Intent
- Interview and Research
- Write the SKILL.md
- Skill Writing Guide
- Writing Style
- Test Cases
- Running and evaluating test cases
- Step 1: Spawn all runs (with-skill AND baseline) in the same turn
- Step 2: While runs are in progress, draft assertions
Installation
Add skill-creator to your agent with:
git clone https://github.com/CherryHQ/cherry-studio ~/.claude/skills/skill-creatorReview a skill’s source before installing it — skills can instruct your agent to run commands. This command comes from the skill’s public repository, which is the source of truth for setup steps. New to skills? Read how to install Claude Code skills.
Supported agents
- Claude Code — declared in the repository topics
- Codex — declared in the repository topics
License
skill-creator is published under the AGPL-3.0-only license.
Strengths
- Clear AGPL-3.0-only license — safe to read and adapt within its terms
- Ships in CherryHQ/cherry-studio, an established project with 52,047 GitHub stars
- Works with Claude Code, Codex
- Actively maintained — repository updated in the last 30 days
- Its repository gained 2,859 GitHub stars over the last 52 days
Author
Topics
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 git clone https://github.com/CherryHQ/cherry-studio ~/.claude/skills/skill-creator in your agent, then reload your skills. Review the source at https://github.com/CherryHQ/cherry-studio before installing.
- Is skill-creator free to use?
- Yes. skill-creator is free and open source under the AGPL-3.0-only license, so you can read, run, and adapt it within that license's terms.
- Which agents does skill-creator work with?
- skill-creator lists Claude Code and Codex — named in its SKILL.md, its plugin marketplace or its repository topics. Skills use the portable SKILL.md format, so other agents that read that format may load it too.
- Where does skill-creator come from?
- skill-creator ships inside CherryHQ/cherry-studio, a repository that contains 37 catalogued skills in total. The repository's 52,047 GitHub stars apply to that whole collection, not to this skill on its own.
