In the rich text editor:
@caoimhesmellsweird
In a comment:
[caoimhesmellsweird](https://chowlings.com/user/caoimhesmellsweird)
For Names and Avatars:
In the rich text editor:
%caoimhesmellsweird
In a comment:
[](https://chowlings.com/user/caoimhesmellsweird) [caoimhesmellsweird](https://chowlings.com/user/caoimhesmellsweird)