Agent skill · software engineering · aiskillstore
chatgpt-app-builder
DEPRECATED: This skill has been replaced by `mcp-app-builder`. Check if `mcp-app-builder` is available in the skills folder. If not, install it: `npx skills install mcp-use/mcp-use --skill mcp-app-builder` Use `mcp-app-builder` instead of this skill. Build ChatGPT apps with interactive widgets using mcp-use and OpenAI Apps SDK. Use when creating ChatGPT apps, building MCP servers with widgets, defining React widgets, working with Apps SDK, or when user mentions ChatGPT widgets, mcp-use widgets, or Apps SDK development.
Why this skill is useful
Provides specific implementation patterns and widget creation commands for building ChatGPT apps that the AI wouldn't reliably generate on its own.
What it needs
Requires mcp-use installed locally. About 2k tokens when loaded. Last updated 2026-08-07. 405 stars on the source repository.
What this skill does
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 Server handlers + widget creation → server-and-widgets.md: when writing server.tool() with widgets, widget() helper, React widget files Widget state and LLM context → state-and-context.md: when persisting state, triggering LLM from widget, managing ephemeral vs persistent data Display modes, theme, layout → ui-guidelines.md: when adapting to inline/fullscreen/PiP, handling theme, device, locale Component API → components-api.md: when using McpUseProvider, Image, ErrorBoundary, useWidget CSP and metadata → csp-and-metadata.md: when configuring external domains, dual-protocol metadata Advanced patterns → widget-patterns.md: when building complex widgets with tool calls, state, theming Quick Reference
How to use it
Reference it in AdaL, Claude Code, Cursor or any coding agent — nothing to install:
@skills aiskillstore/chatgpt-app-builder--30c9a4