What probably matters to youSection of the release
What
The prototype skill names three fidelities, sketch, clickable and wired, defaults to clickable, and states its pick instead of asking you. If you explicitly ask, it can prototype a feature on top of an existing app, either as a screenshot overlay or a shell built from your repo source. A new hand-off step converts the finished prototype into an approved brief split into must-have, nice-to-have and cut.
Evidence
Every prototype is built at one of three fidelities, and naming it sets
Strings lifted out of the shipped bundle, so the claim above can be checked against them.