Adoption dashboards show you AI usage going up and stop there. Yardstick overlays the AI-assisted share of your merged PRs against your revert (defect) rate over the same weeks, so you can see whether velocity is costing quality. If defect rate climbs as AI share grows, the chart says so; that is the check an adoption number cannot give you.
Velocity versus quality
The honest chart: is shipping faster with AI quietly raising your defect rate?
