Most tutorials for building a support agent start with an OpenAI key and a vector store on someone else's cloud. I build these sovereign AI support agents for French online shops, and for a lot of them that starting point is a non-starter: the customer data has to stay in the EU, on infrastructure they can point to, running a model whose weights they can keep. This post is about the parts of the build that change once "stay in the EU" is a hard requirement instead of a nice-to-have. I run o...