I want to start with a failure, because it taught me more than the wins. We built an AI code review bot. It was wired directly into pull requests. The pitch was simple. AI reviews first, then humans just approve the good stuff. It sounded like free velocity. The first thing it did was add about half a day to PR cycle time. Not because it broke CI. Because authors read the suggestions line by line, trying to separate signal from noise. By around day 60, engagement in the ta...