Simply consider it to be part of the swing sequence. I do.
I hate that it is so easy for me to get tripped by semantics. It would probably be very helpful to build a common definition for things like "swing sequence", "launch sequence", "Go!" and sticky it to the forum.
What I mean to say is that in what I teach, at Go/Launch, the only thing to actively do is turn the barrel. This part of the swing has a critical timing element, an instantaneous "do". Coiling could have started earlier or later in the hitters individual process, but the only thing that matters at Go/launch is that the hitter is fully coiled and still wringing the rag in their rear hip.