AI-Native UI Components: Architecture and Grammar

Your design system has a hidden assumption: there is exactly one actor at the keyboard. That assumption is about to break. Two actors are about to share every interface you ship. The user, and the agent acting on their behalf. They will read the same screens, mutate the same fields, and sometimes try to act on the same component at the same instant. Almost no component library in production today was built for this. Most attempts to fix it start at the wrong layer.