I really love the custom icon feature of task.
Is there any existent BehaviorDesigner icon packages for general purpose ai design?
Or is there any plan to make such a icon extension package in Unity Asset store?
This is an interesting idea I'm not aware of any community icon set, and all of the icons that we've created are within Behavior Designer itself. When we release a new task pack (such as Movement Pack) there are custom icons to go along with that, but I know that's not exactly what you are looking for.