I created this chrome extension for myself where I track my own behavior locally and recommend myself content from platforms I want content from (youtube/twitter/quora/etc) in a feed. I made it public just in case anyone else was interested.
I would rather have control over my own algorithm and own the data. Also, it gives me flexibility. Turns out I do like these feeds just not when I don't own it haha. Let me know what you think of my implementation?
I have been working on something a little bit related recently, related to books. Kind of reverse-discovery, maybe.
I noticed that my ebook libraries in apps pretty much always end up in the same ordering, or sets of orderings. So I would tend to forget about interesting books I bought, the longer it's been since I purchased them.
I wrote some scripts that collect random thumbnail images from my various ebook and PDF collections every so many minutes and gather them into little collections. Like shuffling cards and dealing some out. It's very simple stuff but it's already been nice to have.
I also noticed that my collection of Gutenberg texts didn't have the greatest thumbnails, so I made a script to pick random excerpts from N different Project Gutenberg books at intervals. Then it joins then to a single text file. Kind of like visiting the bookstore to browse through some books a bit, see what's interesting.
Anyway, this interests-related stuff is enjoyable. I really like your idea for the discovery side of things, thanks for sharing it.