Open-source skill for AI agents to build importable Retool apps

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Hey everyone,

We've open-sourced a skill that lets AI coding agents (Claude Code, Cursor, Cline, etc.) build complete, importable Retool apps from natural language prompts.

What it does:

  • Build — describe what you need, get a zipped app ready to import
  • Edit — add components to an existing app (search bars, filters, modals)
  • Improve — audit an app against production best practices and fix issues

It handles the tricky parts of ToolScript — position math, ID generation, nesting rules, query wiring, event chains — so the agent doesn't silently produce apps that fail on import.

Comes with 8 Python scripts (validate, scaffold, add components/queries, etc.), 6 example apps, and a condensed ToolScript cheatsheet.

Repo: GitHub - onsen-ai/retool-app-builder-skill: Claude Code skill for building, editing, and improving importable Retool apps using ToolScript. Includes validation, scaffolding, and 8 automation scripts. · GitHub

We tested it against 3 eval scenarios and it produced valid, importable apps 100% of the time vs 81% without the skill.

Would love feedback from the community — especially if you try importing the example apps or generating your own. PRs welcome!

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