The demo
Show the smallest thing that makes the sale. You don't need a working product — you need a believable one.
Your job: design the smallest thing you can show to make the sale.
Design my demo Read `offer://current` and `business_model://current`. Design the smallest viable demo (use the FAVORITE shape) that proves the core promise in under a minute. List what to show, and what to hold back. claude mcp add --transport http leanspark https://leanspark.ai/mcp Connect first →
What you get back
Designs the smallest viable demo that resolves the root cause from your pitch — the format, the three-to-five-step flow, what to deliberately hold back, and a prep checklist — so you can build it from mockups or words, not a working product.
A demo design you can deliver in under a minute, with a hold-back list so you don't over-show. You record what actually resonates when you run it.
The most common reason founders delay pitching is they think they need a working product first. They don’t. The whole point of Demo-Sell-Build is that the demo comes before the build. Your job in Act 3 is to show the smallest thing that resolves the problem you just sharpened — not to teach them the product.
Low fidelity beats high fidelity. A demo doesn’t have to work. It has to be believable. Screenshots, mockups, a click-through, sometimes just a vivid verbal walkthrough — any of these can carry the story. A polished, fully-working demo often hurts: it invites questions about edge cases and turns the sale into a training session. Show how you get the job done better, and hold the rest back.
The shape that works is FAVORITE: Frame the pain you established in Act 2, Visualize the before-and-after, Reveal the workflow in three to five steps (no more), Implant the value by tying it to their number, and Elicit a response — stop and check whether they’re sold before you go anywhere near price.