By activating the development mode you have access to many tools for the creation of an add-on in the ACP.
But first you will have to go through a command line like
Code:
$ php cmd.php xf-addon:create
It will create the add-on in ACP >> Add-ons then you can work on it.
XenForo provides developers with a number of built in tools you can use to expedite development of add-ons and we'll go through some of these below.
xenforo.com