To achieve "Architectural Sovereignty", engineers use specific design patterns that treat AI models like interchangeable batteries rather than permanent engines. Here are the three most critical patterns for de-risking your AI supply chain: 1. The Model Router (The "Interchange" Pattern) Instead of hard-coding an OpenAI or ElevenLabs endpoint into your application, you point your app to an Internal Router . How it works:  The router acts as a traffic controller. Based on a co