From Auth9 to Agent Orchestrator: how an AI-native development method evolved into a Harness Engineering control plane

I have spent years practicing extreme programming and TDD. So when AI coding tools became good enough to handle a meaningful share of day-to-day work, I adopted them quickly and enthusiastically. Then I hit a very predictable wall. I became the bottleneck. AI could write code quickly. It could write tests quickly too. But the final question, "is this actually correct?", still landed on me. I had to review the implementation, run the environment, click through flows in the browser, inspect app