The machine writes 41% of the code. Team velocity has barely moved.
Fresh reports puncture the central myth of the AI era. High-adoption teams close 21% more tasks and merge 98% more PRs — but review time has grown by 91%. The bottleneck did not disappear; it relocated — from writing code to human approval.
AI co-authored PRs surface ~1.7× more issues. The ghost in the machine is mighty, but the praetor at the gate is still you.
The verdict for team leads: measuring velocity by PR count is now meaningless. The constraint is review capacity. That is where to look.