Build MCP Apps & Widgets

Build or repair mcp-use apps that return React widgets from resources/ and run in ChatGPT plus MCP Apps hosts such as Claude and Goose.

Not building UI? Use build-mcp-use-server. Building a client that connects to MCP servers? Use build-mcp-use-client.

Trigger boundary

Use this skill when the task is about:

• creating a new mcp-use widget app from scratch
• adding widgets to an existing mcp-use server
• fixing useWidget, useCallTool, widget(), widgetMetadata, CSP, theme, streaming, or display-mode behavior
• shipping the same widget flow to ChatGPT and MCP Apps-compatible clients

Do not use this skill when: