The investor gave it to me straight. "Every founder I meet says AI is their advantage. None of them can tell me what happens when GPT-6 ships and their product becomes a feature." That stuck with me. A few weeks later I sat in on a presentation where an investor walked through AI-era defensibility, pulling from theses published by YC, NFX, a16z, and Bessemer. They disagree on plenty, but they line up on one thing: the product is not the moat. The product may get you in the door. The moat is what keeps you there. He had founders come up to the front of the room and share their moat to see how defensible it was. Basically explain why a well-funded competitor can't replicate it in 90 days. Half the founders in the room couldn't do it. It was so eye opening that I turned the framework into a 12-question self-assessment so other founders could score themselves and see where the gaps are.…