A philosophical essay exploring how AI transforms the translation layer between design and engineering. Using the Rosetta Stone metaphor, the author argues that AI collapses translation costs and turns mediums fluid — moving systems from solid to liquid to vapor. While this accelerates building, it also erodes meaning. The real craft shifts from translating between disciplines to architecting intent: defining invariants, constraints, and principles that preserve coherence as AI amplifies everything at machine speed. The author introduces 'context engineering' as the new leverage point — shaping the field of gravity that governs AI output rather than just prompting it. The conclusion frames the new professional identity as 'intent architect' rather than translator.