Plugin Development help

I believe this is were i should post if not let me know

How do i add the command under "commands:" in the plugin.yml because the commands are user
defined and they only thing i need to figure out is how to have them automatically added to the plugin.yml file when they define them in the config file.

Plugin.yml-

name: quickresponse
main: me.crushh87.quickresponse.quickresponse
version: 0.2

commands:
(How to auto add them here) <------------------------------------------------------


Config-

#FirstCommand
command1: w <-- When you define here Make it go up under the commands section (arrow)
permission1: qr.welcome
text1: Welcome!