Most of the industrial AI you have seen is a retrieval pipeline with a chat box on it. Chunk the manuals, embed them, stuff the top matches into a context window, let the model talk. It demos well. It falls apart the first time somebody asks a question where the answer depends on what a machine is doing right now. We are an applied research lab called Nodeblue, and the system we build is called Nexus. This is a writeup of the architectural decision at the center of it, which is that the langu...