I have 85,000 PDF documents, collected over a few decades.

What I really want is a semantic interface to those PDF documents. Find me "all PDF files which mention <subject>", or "show me any PDF with python example code", or "all PDF's before 2011 on the subject of coding standards for SIL-4".

I keep thinking this is out there somewhere, but whenever something new comes along I get bogged down in the details of setting it up. Surely someone has come up with an AI that you can just 'give the folder to' and it figures things out automagically?