David Vo

A friend of mine shared a Spotify attachment to one of my group chats when this happened. Perhaps it has something to do with sharing from other Android apps?

I suspect this has something to do with Facebook dropping support for ancient versions of Messenger: https://messengerblog.com/general-messenger/update-on-support-for-older-versions-of-messenger-and-facebook-apps/

See also: dequis/purple-facebook#306

Are pins already bridged from Matrix to Slack as well (i.e. (un)pinning messages on Slack when m.room.pinned_events changes)?

They do: https://api.slack.com/events/message/me_message

Ah, right. I had to check how wee-slack does it just now. https://api.slack.com/methods/chat.meMessage

Hmm, that API doesn't take the `username` field? That's a bit annoying. Could still do it when puppeting though?

I'm not sure this API is relevant. I'm referring to this feature: https://get.slack.help/hc/en-us/articles/360004635551-Manage-channel-posting-permissions-

This is probably mostly relevant for automatically provisioned rooms, since I've separated out #533 as a separate concern.

The [*.invite](https://api.slack.com/methods/conversations.invite) methods require the OAuth user `channels:write` scope, which by the look of things the Slack app currently doesn't request.