ChatGPT App Builder

Build ChatGPT apps with interactive widgets using mcp-use. Zero-config widget development with automatic registration and built-in React hooks.

The app is consumed by two users at once: the human and the ChatGPT LLM. They collaborate through the widget -- the human interacts with it, the LLM sees its state. The widget is your shared surface.

Before You Code

• Clarify what to build → discover.md: when starting a new app, validating an idea, or scoping features
• Design tools and widgets → architecture.md: when deciding what needs UI vs tools-only, designing UX flows

Setup

• Scaffold and run → setup.md: when creating a new project, starting dev server, connecting to ChatGPT/Claude

Implementation