/grill asks only about what you will notice
/grill now asks about the flow, the feel and the look, decides the technology itself, and tells you plainly how each of your points will be met.
/grill asks about what you and the people using your product will see and feel: the flow step by step, how it should feel, how it should look and what done means. It no longer asks you to pick a technology, a format or an architecture. It decides those itself, checking each fact first.
When nothing is left to guess, it works out the plan without showing it to you. It picks the best way the project allows, and bends a limit a little when that makes the result better. Then it tells you, one plain sentence per point, how each thing you asked for will be met. The words are meant for the people who will use the product, for you as its creator, and for Bandicot itself.
It still builds nothing until you say go. /plan writes the full plan when you want to see it.