AmanBanik/Agen ? reverse-engineered prompt

Build me a terminal based AI coding assistant called Agen that feels like a real interactive command line app, not just a script. It should let me chat with an assistant in the terminal, attach files or folders with @, and use slash commands for things like help, clearing the screen, checking tokens, switching models, and indexing a project so it can remember code from the repo later.

I want it to support both cloud and local AI, with an easy way to switch between Gemini and Ollama. It should also be able to run tools on my machine, spawn background helper agents for bigger tasks, and connect to external tool servers if needed. Make it polished with a nice terminal UI, good status feedback, and a clean workflow for coding, refactoring, and debugging.

Please make it work on Windows and also be installable from source on Linux and macOS. Look up current docs online if you need to.