This is now working!
@nxd4n Will POSSE targeting threaded replies come next?
@chrisaldrich I think we must wait for brid.gy to integrate mastodon
@nxd4n I suspect there's a way to do it natively. Better would be for Mastodon to support incoming/outgoing webmentions in general!
@chrisaldrich seems it's the case https://mastodon.social/@kevinmarks/585362
@nxd4n I've been following it reasonably closely, but it may be a bit before webmentions happens...