a prototype of the following design is available at backlinks.cerulea.blue. lately i have been working on indexing backlinks on the AT Protocol network. on atproto, every reply links to its parent (and thread root), every like/repost points links to its subject, and every follow/block points at the target identity. to do useful work, you often need to reverse these links (e.g. find everyone who follows a given account, or find all replies to a given thread). so i’m working on backlink indexing; this duplicates the prior art of fig’s microcosm.blue constellation with two differences: constellation, as a live-tailing system, only...