Or actually just brace the walls. The first of the plywood bracing has been nailed up. It's super thin, but does the job of holding the framing square, just like the back board of an IKEA bookcase.
The deck structure has been built, resting on temporary supports. The steel posts will be attached to this timber frame, and then concreted into the footing holes once they are exactly the right height.
Aaaaand, the ground floor wall framing has been finished!