Am I missing something? This doesn't seem to be an "index" at all. The name "index" made me think its trying to accomplish what marginalia is already doing
https://marginalia-search.com/
And stuff like Gossip's Web has been around for a decade now
IndieWeb also has a massive "web ring" that has a similar aim
III is basically Gossips Web but searchable. users submit sites with descriptions used for semantic search
not a crawl-based index
I don't think there is anything wrong with overlapping other projects, particularly when it's about surfacing the personal web.