So far I do not see any licensing terms, the source file headers only state the copyright notice. Do you have any plans about that?
> I came up with the idea while waking up from a nap and then was so blinded by how great this feature would be to have.
This has happened to me many times. In my case I forget how my program works fron all the approaches I have tried while writing it, then get excited to try a great idea which then does not work because it relies on some feature from one of the alternatives that I rejected for some other reason.
I will indeed waste a few hours trying the PDF indexing idea, there has to be some way to make it work. I have done some feeble attempts in this direction by myself before using the C library pdfio ( https://github.com/michaelrsweet/pdfio) which would work also on Windows. I will probably crash again on that wall but if the code search works as described I will still use this program every day.