Digital designers should understand code as a material in the same way architects understand stone or steel, learning what it can do without necessarily mastering how to write it. AI increasingly handles implementation, making it practical to design and review working interfaces in code where responsive behavior, real data, loading states, accessibility, and failure conditions can be experienced rather than represented as static pictures. The valuable skill is therefore shifting from syntax toward understanding how software behaves, testing its limits, and judging whether the resulting product actually works for people.