Visual markdown editor panel extension

Actually I need to add custom buttons inside a textarea but I’m unable to find any plugin that add custum buttons in a textarea field.

I also had a look to SimpleMde plugin but there is no way to add custum buttons like @iancox have in his textarea:

image

I need those buttons to add kirbytags template like (mykirbytag: Text url: Writeyoururl color: addyourcolor) as I always forgot them!!! But I don’t want to operate on core code of the plugins as in a new update I will lose everything!

Also… the autocomplete feature of the discontinued Kirby Visual Markdown doesn’t works for me… and that was a super useful feature!