The main things are https://matrix.org/blog/2025/04/introducing-policy-servers/ https://matrix.org/blog/2025/04/introducing-policy-servers/ (for flexible server

The main things are https://matrix.org/blog/2025/04/introducing-policy-servers/ https://matrix.org/blog/2025/04/introducing-policy-servers/ (for flexible serverside moderation) and the rest of the stuff in https://matrix.org/blog/2025/02/building-a-safer-matrix/ https://matrix.org/blog/2025/02/building-a-safer-matrix/. Clientside filters already existed, but given they only apply per client and there are a lot of different clients, we focused on serverside filtering.