UI Is Not a View Layer. It’s an Interface Contract.

CortexUi is an AI-native interface system built on this exact idea: UI should be operable by humans visually and by intelligent agents programmatically. The project lives on GitHub , and the full docs are available at cortexui.llcortex.ai . Frontend developers have spent years talking about UI as a view layer. That framing is too small. A serious interface is not just something that looks good and responds to clicks. It is the operational boundary between a system and whoever is trying to use it. For years, that “whoever” was assumed to be a human. Now it is increasingly a human and a machine. Once you accept that, the way we talk about UI starts to feel outdated. Backend engineers have been trained to think in contracts for decades. A good API is explicit. It names its endpoints. It declares its inputs. It specifies success and failure modes. It gives clients something stable to build against. We treat API contracts as real architecture. But on the frontend, we routinely ship interfac