He Built 40 Startups Using Just Prompts — Here’s How

Get ready, AI Tinkerers.

We’re sitting down with Kevin Leneway — principal engineer at Pioneer Square Labs and the guy who’s helped spin out 40 startups using one core skill: prompting.

In this episode of One-Shot, Kevin breaks down his real workflow for shipping AI products fast — using markdown checklists, agent coding, rubric-based UI design, and zero Figma.

“I don’t need Figma. I just prompt my way to a working front end.” — Kevin Leneway

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Three takeaways you’ll use immediately:

1. Promptable Workflows Scale Faster Than Dev Teams
Kevin uses markdown prompts to spin up BRDs, PRDs, story checklists, and frontends — faster than most teams can get into sprint planning.

2. Design Without Figma
Using rubrics, he gets Claude to output full UI components, atomic design systems, and Storybook documentation — ready to ship.

3. Agents That Actually Ship Code
His CLI agents run prompts, build code, validate outputs, and even debug. Not theory. Not a demo. Real builds.

Learn more from Kevin

Check out more information like this at Kevin’s YouTube. Also, check out Kevin’s Github.

“We’ve gone from fake landing pages to fake full products in 48 hours.” — Kevin Leneway

If you’re serious about building with AI — this is the episode you’ll want to take notes on.

Welcome to the future of product development.

Welcome to AI Tinkerers.