OpenAI built a system where PMs ship 100,000+ lines of code. Here's the roadmap to get there.Engineers are banned from typing production code. Their entire job is building the harness, a set of guardrails, tests, and documentation that prevents the AI agent from writing bad code in the first place. The first month was 10x slower than doing it the old way. By month three, a PM wrote a PRD on Monday and shipped a working pull request by Friday without a single engineer touching the code.The harnes