# Skill Creator (agent skill)

> Skill Creator is an agent skill (a SKILL.md file) from anthropics/skills. Create new skills, modify and improve existing skills, and measure skill performance. It works with Claude Code and has 179,945 GitHub stars across a repository of 9 listed skills.

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. A skill for creating new skills and iteratively improving them.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/anthropics/skills |
| Skill path | skills/skill-creator/SKILL.md |
| Skill name | skill-creator |
| GitHub stars | 179,945 |
| Installs on skills.sh | 398,688 |
| License | Apache-2.0 |
| Skills in repo | 9 |
| Plugin marketplace | anthropic-agent-skills |
| Official | yes |
| Works with | Claude Code |
| Category | Testing & QA |
| Last commit | Oct 5, 2026 |

## When it triggers

- 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.

## Add this skill

### Claude Code

```sh
/plugin marketplace add anthropics/skills
/plugin   # browse anthropic-agent-skills and install the plugin that contains skill-creator
```

In the Claude apps, zip the skill folder and upload it under Customize > Skills > + > Upload a skill (code execution must be on).

### ChatGPT / Codex

```sh
git clone --depth 1 https://github.com/anthropics/skills.git
cp -r skills/skills/skill-creator .agents/skills/skill-creator   # repo; ~/.agents/skills for all projects
```

### Cursor

```sh
git clone --depth 1 https://github.com/anthropics/skills.git
cp -r skills/skills/skill-creator .cursor/skills/skill-creator   # project; ~/.cursor/skills for all projects
```

Sources (checked 2026-10-07): https://code.claude.com/docs/en/skills, https://support.claude.com/en/articles/12512180-using-skills-in-claude, https://learn.chatgpt.com/docs/build-skills, https://cursor.com/docs/context/skills

skills.sh listing: https://www.skills.sh/anthropics/skills/skill-creator

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Canonical page: https://appsgit.com/skills/anthropics-skill-creator
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