I was thinking about similar solution (actually, textblaze funded by YC is pretty much that) but I didn't like remembering the shortcuts part. So I made a different kind of indexing for it: https://discu.space/ Presentation uses 'what are you answering to' as a key, but you can use anything.
It currently exists as (hopefully working for everyone, could use more testing) Chrome extension, but there's a universal API underneath. It could be run entirely locally if one was to give up portability.
It currently exists as (hopefully working for everyone, could use more testing) Chrome extension, but there's a universal API underneath. It could be run entirely locally if one was to give up portability.