Ask HN: How are you using LLMs for research on a library of journal articles?

Does anyone have a nice setup for using LLMs to perform queries on their personal library of papers? It seems there are countless ways to do this sort of thing nowadays, but I can imagine that some approaches are far superior in terms of cost, speed, accuracy, etc. Are you using any of the proprietary solutions and getting nice results? Any ways to minimize privacy concerns while keeping things simple, ideally plugging something into my Zotero library?