techjarves/portable-ai-usb ? reverse-engineered prompt

Build me a fully portable AI assistant that runs straight from a USB drive and works offline after the first setup. I want a simple installer that lets me pick one or more local models to download, then sets up Ollama and AnythingLLM on the USB so all chats, settings, and files stay there, not on the host computer. It should work on Windows, Mac, and Linux, with easy double click launchers for each one, and the app should open ready to chat after startup.

Please make the setup smart enough to skip models that are already downloaded, let me add more later, and support a custom GGUF model link too. Keep the experience private and clean, with no traces left behind on the computer. If you need to, look up the current docs for Ollama and AnythingLLM online, then wire it all together in a way that feels simple for a normal person to use.