QuivrHQ/quivr ? reverse-engineered prompt

Build me a Python library for a second brain style AI assistant.

I want to be able to point it at a few files like PDFs, text files, or markdown, and then ask questions about them in plain English. It should work out of the box with a simple setup, but also let me tweak how it searches and answers, like choosing different models, changing the retrieval behavior, and adding things like reranking or internet search later.

Please make it easy to install and use with just a few lines of code, so someone can create a brain from files and call one method to get an answer. Use current docs online if you need to check anything. The main goal is to keep the RAG part simple so I can focus on my app, not the plumbing.