# Steel Developer Skill
URL: /overview/skills/available-skills/steel-developer

---
title: Steel Developer Skill
sidebarTitle: steel-developer
description: Use Steel Developer when an agent should write reusable Steel code, scripts, examples, or app integrations.
llm: true
---

## Install

```bash Terminal
npx skills add steel-dev/skills --skill steel-developer
```

After adding the Steel Skills marketplace in Claude Code:

```bash Terminal
/plugin install steel-developer@steel-skills
```

## Use When

- The user wants SDK, REST API, Playwright, Puppeteer, Stagehand, or Browser Use code.
- The user is building an app on Steel.
- The task involves credentials, profiles, files, extensions, live embeds, traces, or computer-use integrations.

## Example Prompts

- "Write a TypeScript Playwright script that runs on Steel."
- "Show how to upload a file into a Steel session and submit it."
- "Build a UI that embeds a live Steel session viewer."

## Related Skills

- Use `steel-browser` for live web work now.
- Use `steel-session-debugging` for failed-session diagnosis.
- Use `steel-reliability` for bot/proxy/CAPTCHA/login mitigation.