I'm not aware of this feature being included in Dev yet, but there is a new version out which I haven't looked at yet.
But for the records, my comment about memory usage in the thread you linked was meant for this command
particle compile photon <buildPath> --target 0.5.0 --saveTo firmware.bin
(now 0.6.2 would be the default target tho')
and not for
particle serial inspect - and even less for
particle serial identify