In the rich text editor:
@Foe
In a comment:
[Foe](https://chowlings.com/user/Foe)
For Names and Avatars:
In the rich text editor:
%Foe
In a comment:
[![Foe's Avatar](https://chowlings.com/images/avatars/2178.png?v=1681226705)](https://chowlings.com/user/Foe) [Foe](https://chowlings.com/user/Foe)