Chat Focus is a lightweight, client-side mod that hides other server chat. Pick one player, and only their messages show up until you turn it off.

Commands

• /chatfocus <player>: only show chat from that player; works for anyone.
• /chatfocus off: go back to normal chat and see how many messages were hidden.
• /chatfocus: check who you're focused on.

Good to know

• Your own messages always show.
• Focus turns off when you leave a server or world.
• Server messages are hidden while focused.

Requires Fabric API.