In the rich text editor:
@mondegrun
In a comment:
[mondegrun](https://chowlings.com/user/mondegrun)
For Names and Avatars:
In the rich text editor:
%mondegrun
In a comment:
[![mondegrun's Avatar](https://chowlings.com/images/avatars/default.jpg)](https://chowlings.com/user/mondegrun) [mondegrun](https://chowlings.com/user/mondegrun)