OpenMentions is a project designed to use Webmentions and ActivityPub for topical content discovery. The site is organised along the lines of a hierarchy of topics going from broad to fine. This we call OpenTopic – the idea being that many sites could host the full collection of topics so that the loss of any one site is not the loss of all topics.

The intention is that this site should own nothing and that topic hierarchies are organic and discoverable.