Skally is referring to fight style. Preps, interrupts, etc.
T1 means something entirely different to me.
The preparation should be generally baked into the spell. Interrupt-ability would depend on the complexity of the spell (which should also be baked into it in descriptions).
I'm not sure if that answers the question. It is easier for me to specifically address questions on what boundaries and restrictions people are asking about than trying to put it into the T system RPG uses.