Zero Lines of Code

After forty-five years of writing code for Fortune 500 companies, Glen Barnhardt rewrote a production SaaS application without typing a single line. No team. No agency. Just one developer and an AI.

This isn't a book about AI hype. It's the real story of a nine-month rewrite — the disasters, the breakthroughs, and the framework that emerged from it. From a three-week 'finished' application with three hundred TypeScript errors to a live production system processing real business for real clients, this book shows you exactly what AI-assisted development looks like when the stakes are real.

Inside you'll discover

• Why a veteran developer's judgment matters more in the age of AI, not less
• The Claude.md system that turned unreliable AI output into production-ready code
• How to build a framework of hooks, skills, and agents that makes AI obey your standards
• The task automation system that completes ten development tasks in thirty minutes
• The real economics — what it costs, what it saves, and why $200/month replaces a dev team
• Why you don't need anyone's framework — and how to build your own

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Glen Barnhardt has spent forty-five years in enterprise software — building ERP suites, managing teams, and consulting for Reliance Electric, Fiskars, and Allied Signal. He holds a Master's degree in Information Systems. Today he works as an Agentic AI Engineer, building production software without writing code.