I did something similar for search until I found Recoll. It has similar functions to what you describe(caching, fuzzy search) with a slick work flow that shows

I did something similar for search until I found Recoll. It has similar functions to what you describe(caching, fuzzy search) with a slick work flow that shows google scholar like context previews with an optional remote access to your library through a webui. It also searches compressed archives and generally simplifies searching many unorganized files. http://www.lesbonscomptes.com/recoll/ http://www.lesbonscomptes.com/recoll/