“if you have exhaustive verification then you can ship code at the speed that your agents write it. If you don't, then someone somewhere at your organization is spending time verifying code and that is now your new bottleneck”

Meticulous, which sells this, records real user flows in non-production environments and replays them against each PR with mocked network calls and a deterministic browser. Isolating each replay this way removes race conditions, so the replays can run in parallel with few flaky results. Quoted from YouTube’s auto-generated captions.