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Prototype

Prototype is an agent skill (a SKILL.md file) from emilkowalski/skills. Build multiple genuinely different versions of a UI piece you describe, rendered behind a visual picker so you can flip through them live and promote the one that feels right. It works with Claude Code and has 49,702 GitHub stars across a repository of 14 listed skills.

github.com/emilkowalski/skills/skills/prototype (opens in a new tab)

Data as of from the GitHub API and skills.sh; description from the skill's SKILL.md. Report an error

View on GitHub (opens in a new tab)View on skills.sh (opens in a new tab)

Add this skill

Claude

Claude Code loads skills from ~/.claude/skills/ (all projects) or .claude/skills/ (one project):

git clone --depth 1 https://github.com/emilkowalski/skills.git
cp -r skills/skills/prototype ~/.claude/skills/prototype   # personal, or .claude/skills in a project

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

ChatGPT / Codex

Codex reads skills from .agents/skills/ in a repo or ~/.agents/skills/ for every project:

git clone --depth 1 https://github.com/emilkowalski/skills.git
cp -r skills/skills/prototype .agents/skills/prototype   # repo; ~/.agents/skills for all projects

Standalone skills also load in the ChatGPT desktop app.

Cursor

Cursor loads skills from .cursor/skills/ (or ~/.cursor/skills/) and also reads .claude/skills/:

git clone --depth 1 https://github.com/emilkowalski/skills.git
cp -r skills/skills/prototype .cursor/skills/prototype   # project; ~/.cursor/skills for all projects

Source (checked Oct 7, 2026): code.claude.com/docs/en/skills (opens in a new tab), support.claude.com/en/articles/12512180-using-skills-in-claude (opens in a new tab), learn.chatgpt.com/docs/build-skills (opens in a new tab), cursor.com/docs/context/skills (opens in a new tab)

What this skill does

Build multiple genuinely different versions of a UI piece you describe, rendered behind a visual picker so you can flip through them live and promote the one that feels right. Only runs when explicitly invoked; it does not trigger on its own. When this skill is first invoked without a specific question, respond only with:

When it triggers

  • invoked; it does not trigger on its own.

More skills in emilkowalski/skills

14 skills are listed from this repository.

Similar skills

More design & frontend skills

All Design & frontend

FAQ

Prototype FAQ

Still curious? Email info@appsgit.com.

How do I install the Prototype skill?

Copy the prototype folder (the one containing SKILL.md) into ~/.claude/skills/ for Claude Code, .agents/skills/ for Codex or .cursor/skills/ for Cursor. The agent picks it up automatically when a task matches its description.

Is the Prototype skill free?

Yes. The repository is open source under the MIT license.

Is Prototype maintained?

The repository's most recent commit was on Oct 11, 2026. appsgit only lists skills from repositories with a commit in the last six months.