When a new iOS or Safari beta ships, small teams maintaining consumer websites worry that login, payment, or upload flows will suddenly fail after users upgrade. Developers select critical flows in a pre-production environment, enter test accounts and expected outcomes, and let real cloud devices replay the steps across device models and OS versions. Every click, network request, and screen recording is retained. If a flow fails only in Safari, the product starts reducing the page from the failure state. It progressively removes irrelevant DOM sections, styles, and scripts, then reruns the same action. Once the page has been reduced to the smallest case that still errors, engineers can see whether the trigger is a CSS rule, a browser API, or a third-party component. A results page packages the minimal web page, device recording, console output, and network trace in one link. Teams can attach it directly to a bug report or have a coding agent generate a patch based on the suspected trigger. Before the patch is merged, both the original flow and the minimal case run again to confirm that the fix has not masked another issue. The initial scope covers the most common login, checkout, and file-upload flows on iOS Safari. It does not replace full cross-browser testing; it specifically turns hard-to-handoff Safari-only issues into reproducible, fixable engineering packages.