Your Agent Checked Everything. It Was Still Wrong. (opens in new tab)

I have been running a multi-agent development workflow for months now — one model writes the design, another generates the code, a third reviews the implementation, and I approve the result. It works well most of the time. But recently, three failures went through this pipeline undetected, and they share a pattern I had not been able to articulate until all three were on the table. They are not impressive bugs. The individual root causes are straightforward once you see them. What makes them ...