I had a feature in my AI agent system that looked complete. The design document existed. The code worked in isolation. The usage instructions were written. I had already moved it into the “done” column. Then I checked the execution history. The feature had not activated once in 40 days. It was not broken. The runtime simply never chose it. The 40-day period comes from my own development log. It is not an industry benchmark or a general claim about AI agents. But it exposed a mista...