# HTML Prototype (agent skill)

> HTML Prototype is an agent skill (a SKILL.md file) from plannotator/effective-html. Direct-invocation specialist for polished, responsive, self-contained HTML mockups and interactive prototypes grounded in the user's conversation, product context, and design language. It works with Claude Code and Codex and has 3,555 GitHub stars across a repository of 3 listed skills.

Direct-invocation specialist for polished, responsive, self-contained HTML mockups and interactive prototypes grounded in the user's conversation, product context, and design language. Use when the user explicitly invokes html-prototype or the broad html skill routes a mockup or prototype request here. Do not activate independently from a general request. Treat a mockup as a noninteractive fidelity mode within this skill, not as a separate skill. Build a credible model of a product decision.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/plannotator/effective-html |
| Skill path | skills/html-prototype/SKILL.md |
| Skill name | html-prototype |
| GitHub stars | 3,555 |
| Installs on skills.sh | not listed |
| License | MIT |
| Skills in repo | 3 |
| Plugin marketplace | effective-html |
| Official | no |
| Works with | Claude Code, Codex |
| Category | Design & frontend |
| Last commit | Sep 14, 2026 |

## When it triggers

- Use when the user explicitly invokes html-prototype or the broad html skill routes a mockup or prototype request here.

## Add this skill

### Claude Code

```sh
/plugin marketplace add plannotator/effective-html
/plugin install plannotator-effective-html@effective-html
```

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/plannotator/effective-html.git
cp -r effective-html/skills/html-prototype .agents/skills/html-prototype   # repo; ~/.agents/skills for all projects
```

### Cursor

```sh
git clone --depth 1 https://github.com/plannotator/effective-html.git
cp -r effective-html/skills/html-prototype .cursor/skills/html-prototype   # 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

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Canonical page: https://appsgit.com/skills/plannotator-html-prototype
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