Condition: headphones plugged

[ajalkane]

From user:

Hey, love your app and the recent addition of being able to launch apps without having to use commands in custom actions.
I'm just wondering whether it would be possible to add another condition?
The one I'm interested in is launching an app upon plugging in headphones / a 3.5mm aux cable. I've no idea if this would be hard or not but it'd be an awesome additon to profilematic.