Discord users should be able to find the Matrix rooms
/invite could be sufficient, though perhaps poorly named. It wouldn't let somebody create a shareable matrix.to link to e.g. put on their community's web page, though.
Fix "publish in room directory" privacy level
Inform in-band that encrypted chats are not supported
Fix people misreading "add unbridged room" UI
Don't guess mentions from text within code blocks
Resize avatars before sending to Discord
allow customizable data directory
This won't be merged as-is because it doesn't align with my vision. There's nothing wrong with you continuing to use your own patch though. That's what open source is all about.
Reasoning:
1.…
allow customizable data directory