@caten right on!
Thanks @tonyg@leastfixedpoint.com for boosting the above.
I felt part of it can be done by a convention of file:///magnet/ URI's combined with something like bittorrentfs. "discover" a link, file:///magnet/some_magnet_uri/, and click on it in the browser; the underlying file system torrents it and index.html renders in your browser.
@tetrislife It seems like https://www.btfs.io/ has blockchain and AI stuff and is also on GitHub, so I definitely won't touch that, but yeah, some kind of addressing with magnet links is what I'd like to do.