Hi @vaeringjar, all the information about GNU social Summer of Code is available here: https://www.diogo.site/projects/GNU-social/soc/ .

The AP Plugin is still under development, and help is much appreciated :)
The codebase for the plugin is here: https://git.gnu.io/dansup/ActivityPub/tree/dev

Unfortunately the issue tracker is gone due to technical issues on GIT GNU :/

But we can talk about it on #social at irc.Freenode.net ^^