I think that when you have Xcode connected to your device, the device doesn't sleep.
If disconnect the USB cable, you can actually still develop (at least the ClojureScript aspect), because of the use of TCP-connected REPL and WebDAV. And in this situation clearly the device can go to sleep within a minute or so.
So this ticket is to consider disabling sleep if developing in this mode.
I think that when you have Xcode connected to your device, the device doesn't sleep.
If disconnect the USB cable, you can actually still develop (at least the ClojureScript aspect), because of the use of TCP-connected REPL and WebDAV. And in this situation clearly the device can go to sleep within a minute or so.
So this ticket is to consider disabling sleep if developing in this mode.
Here is a reference http://stackoverflow.com/questions/12661004/how-to-disable-enable-the-sleep-mode-programmatically-in-ios