Dario Amodei talked about what a one-person billion-dollar company could look like. He didn't give an official checklist, but I turned the examples from his answer into three filters to choose a business I could realistically build. → Does the business deploy its own capital? Dario's example was a proprietary trading firm. A real estate flipping business or used car dealership follows a similar pattern: use your money to buy something, improve or trade it, and sell it for more. You may not need thousands of customers, but you do need capital, expertise, and the ability to absorb losses. I ruled this route out because I wanted something someone could start without risking a large amount of their own money. → Can software deliver the result? Claude Code makes building useful software much more accessible. But I could still build myself a full-time job if every customer needs custom onboarding, a sales call, and ongoing help. I wanted a result the software could deliver repeatedly. → Can sales and routine support be automated without making the customer experience worse? This narrowed the options the most. The customer needs to understand what they're buying, get started easily, and receive value without a consultation. A file converter fits that pattern. A product that requires me to explain a different implementation to every customer probably doesn't. I landed on Agent Report Card: software that tests customer support agents and produces a report showing where they fail. An agency can connect its agent, run the tests, and get a deliverable it can share with its client. Routine questions can go through AI support, while refunds and account deletion still come to me. That's the kind of workload I was trying to design for one person.