XF 2 Designated thread to allows users to change others titles


Active member
So I wrote a little addon for xF1, but just can't wrap my head around how xF2 works. Here's what I had:

I had a designated thread, set in admincp, that users could create a post in the format '@Username, custom user title'. Once the post was made, the other person's title would change. The addon was limited to prevent someone from changing their own title.

What would it cost to get something like this done?