What breaks first when a browser agent tries your customer journey?

I have been testing public checkout and signup paths in a clean browser. The failures are usually not exotic: ambiguous button labels, selection states visible only by color, validation that appears without focus, or transitions that never announce what changed.

Agent-Ready Conversion Audit turns one public journey into an evidence transcript and three exact fixes within 24 hours. No credentials or test purchases.

If you have watched users abandon a flow, which step was hardest to diagnose?