Prototype

Produce disposable prototypes that let a human judge a design before it is built. Prototype code may be temporary; everything presented must be credible in its intended product context.

Choose the mode

• UI mode: the question is what a screen, component, or short flow should look like or how it should be operated. Follow the process below.
• Logic mode: the question is whether a logic, state, data-shape, API, or CLI behavior model holds up against real cases. Follow logic mode.

When the question spans both, settle the model first in Logic mode, then the interface in UI mode.

UI process