ActivityPub mentions on #WriteFreely are coming Soon™!
Here's a bit more info about them, including how you might use them to have fediverse conversations around your posts:
https://socialhub.activitypub.rocks/t/upcoming-activitypub-mentions/359
Mentions are live on our demo instance, https://pencil.writefree.ly, right now -- and registrations are open.
Feel free to try it all out!
This instance is only for A Bunch Tell projects.