Hi Fi Design
We only do a Design guide with the objective to give the dev a guide for the UI/UX and the client a sense of the look and feel of the app.
Protocols
We do a maximum of 6 screens unless project is XL, then we do up to 12.
Designer + PM evaluate which are the most relevant screens to recreate from the lo-fi to the hi-fi, usually the main ones.
Always include one list view, one details view and one form.