I got sad for all the dumb questions I've been asking (and even more that I have not yet asked) about lightning issues, and stumbled on this, though I see that it was posted here a year ago (#396203) It's been useful so far, so I'm re-surfacing in case it can help others also trying to untangle things.
I don't know the full methodology for how it was trained, etc., but I'm guessing it's a basic RAG system attached to a simple open-source model. You can imagine a more sophisticated system that's actually trained (vs RAG and fine-tuning) on btc-related stuff being really amazing. One day.