This information is incorrect; the ChatGPT App's UI is not automatically generated. The current implementation uses a pre-built UI template provided by the MCP (which can be packaged as a JS file and placed on npm), displayed as an iframe. ChatGPT retrieves data from MCP and populates it into this iframe (this population is not intelligent; it implements predefined fields). At least at this stage, the entire UI has no composability whatsoever. Furthermore, there are various permission restrictions, making it even less flexible than a Telegram mini-program.