Vibe the screen — do not vibe the rules

Prototype freely on one side of the line, and call Navigator on the other:

• Vibe this. Layout, interaction, the empty state, the error state, what a report looks like when you print it.
• Call Navigator for this. Who may see it, what a valid notation is, what a signature means, what gets recorded.

Two rules travel with every prototype: no client data, ever — invented or firm-owned names only, and reserved example domains for any address — and your prototype is a specification, not a shipment.