From functional scoping to screen production, from prototyping to documentation, I integrated Claude Code into every phase of a product design project over six months. For scoping, it helps structure requirements and generate user flow diagrams. For design, it reads Figma files and produces component code. For prototyping, it builds functional applications deployed on Vercel in hours. For documentation, it generates technical specs and handoff materials. What works: the acceleration is real on repetitive tasks, code generation, and rapid iteration. What slows you down: ambiguous instructions produce ambiguous results, so the designer's ability to frame precisely becomes even more critical. What changes: the designer's posture shifts from someone who delivers screens to someone who orchestrates a production pipeline. The craft does not disappear, it evolves.