Three leading LLMs were tested on real email generation tasks, with 61% average quality and zero production-ready outputs. The problem isn’t the models — it’s what they’re working with. Prompt-to-HTML is structurally broken: no brand memory, no section roles, and no safe way to swap a layout without destroying content.This talk introduces the Email Domain System — a semantic contract layer that turns AI from a generator into an orchestrator. Instead of improvising HTML, AI selects governed components, plans section sequences through compositional briefs, and fills content into defined slots. A variant swap changes the entire layout while preserving every heading, image, and CTA.Dmytro Kudrenko will show, with real examples, how the full pipeline works and why this architecture generalizes beyond email: AI quality is bounded by the semantic contracts it operates within.