bidingcc/buildingai ? reverse-engineered prompt

Build me a self hosted AI app platform for people who want to create useful AI products without coding. I want a clean web app where someone can sign up, log in, and then build things like an AI assistant, a knowledge base chat, a customer service bot, or other business style AI tools through simple visual settings.

It should support chatting with different large models, creating agents with memory and tools, uploading documents for RAG style answers, and connecting to external tools through MCP. I also want a way to manage users, memberships, billing, and payments so it can be used as a real product, not just a demo.

Make it feel polished and production ready, with an admin style dashboard, easy setup, and a good default experience. If anything needs current docs or model provider details, look them up online while you build.