cores-ai/fb ? reverse-engineered prompt

Build me a simple Python bot for Facebook that I can run from a single script.

I want it to connect cleanly, handle login or setup from config, and be able to watch for incoming messages and reply with a basic response. Keep it lightweight and easy to run locally, with clear setup steps and any needed environment variables. If there are a couple of dependencies that make this work better, add them and make sure they are included.

Please make the code tidy, with sensible error handling so it does not crash on common connection problems. If you need to check current docs or examples online to make it work properly, go ahead and do that. I just want a working starter bot that I can test and build on from there.