Hey all! I recently joined the Repl.it team and am focusing on repl-talk. I just added suggestions for at-mentions. To try it start typing "@" on a new post or comment. You can use the UP/DOWN arrow keys to navigate and hit ENTER or TAB to select.
Try it out and let me know if you have any feedback. Also, let me know what other features you would like to see in repl-talk. Thanks!