This is NOT a spigot plugin, It's an add-on to the AGMCore plugin.
To install this move the file to "plugins/AGMCore/Extensions"

This is is for AGMCore 3.3.1 or newer.

Tired of opening one door of a double door? Tired of the Redstone wirings to reach both doors?
It will now end with this add-on. All doors (and trapdoors) facing each other, with the same material, will now act as one.
Anytime they get opened (by a Redstone or player) both doors get activated.
villagers are not included as they are too annoying!