The parallels between the physical supply chain and the modern software stack have never been more striking. In hardware engineering, the principle of "multi-sourcing" is foundational; a design that relies on a single proprietary capacitor or a specific chip from a single factory is considered a liability. For decades, software escaped this scrutiny because its "raw materials"—code, libraries, and compilers—were largely static or open-source. However, the rise of the Model-as