Indeed wow, would be great to see another AP / Solid combo app come into fruition. @thebaer is at @writeas_dev on the fediverse.
PS. for both of you it interesting to check the SocialHub EC event where in the second webinar we want to address crossover and collaboration between both our communities (I created a wiki post for that too). Also of interest is my reaction in From silo-first to task-oriented federated app design - #5 by aschrijver - Fediverse Futures - SocialHub to @bengo’s post, who is also looking into both Solid and AP. Finally there’s How Solid and ActivityPub complement each other best threads on both forums.