@drq @a1batross @LemmyDev @Chocobozzz @rf @dansup @Gargron @humanetech @lightone @syuilo @cwebber @lain @sean
Well, I tried to federate with Lemmy yesterday, and it didn't work because it expects inReplyTo to be an array.
Other than that, there's a FEP of mine about publicly-appendable collections, a very common construct in groups: https://git.activitypub.dev/ActivityPubDev/Fediverse-Enhancement-Proposals/src/commit/f94077e1514928c2d2ae79d86a5953c93874b73d/feps/fep-400e.md
(I hate this thing about Mastodon, and especially the fact that it eats into your artificial character limit)