Looks very much like one of the ideas I've been thinking of building! The way I planned to do it was to use a similar approach to rga for files ( https://github.com/phiresky/ripgrep-all ) and having a webextension to pull all webpages I vist (filtered via something like https://github.com/mozilla/readability ), dump that into either sqlite with FTS5 or postgres with FTS for search.

A good search engine for "my stuff" and "stuff I've seen before" is not available for most people in my experience. Pinboard and similar sites fill some of that role, but only for things that you bookmark (and I'm not sure they do full-text search of the documents).

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Two things I'd mention are:

1. Digital footprint usually means your info on other sites, not just things I've accessed. If I read a blog that is not part of my footprint, but if I leave a comment on that blog that comment is part of it. The term is also mostly used in a tracking and negative context (although there are exceptions), so you might want to change that: https://en.wikipedia.org/wiki/Digital_footprint

2. I don't really get what makes it UNIX-style (or what exactly you mean by that? There seems to be many definitions), and the readme does not seem to clarify much besides expecting me to notice it by myself.