Prototypes that survive contact
A prototype is not a smaller product. It is an argument about what should become real.
The fastest prototype is often the one that tells the truth earliest. It does not need every edge case or a pristine component system. It does need to expose the central risk clearly enough that a team can make a decision.
That risk might be technical, behavioral, operational, or emotional. Will the model produce consistently enough? Will a customer trust this workflow? Can support live with the weird cases? Can the business afford the human review loop?
Build the stress point
We like prototypes that put pressure on the unknown part instead of polishing the known part. If the hard question is latency, simulate real payloads. If the hard question is taste, build the curation surface. If the hard question is handoff, make the handoff visible.
A good prototype may look narrower than expected, but it should make the next decision obvious. Green light, change direction, or stop. All three are useful outcomes.
