Before a single Figma frame is finalised, I build a working prototype for client approval using AI tools to assemble end-to-end flows fast. This freezes exactly what gets built, locks edge cases early, and kills assumption-driven scope creep. On Pizza Hut Malaysia, this meant we shipped all end-to-end flows — across app, web, and kiosk — with every edge case covered, in under 3 months. Prototype-first isn't a preference — it's how I eliminate the revision cycles that kill timelines.