Drift Detection for LLM Routing: Catching Silent Model Degradation

Drift Detection for LLM Routing: Catching Silent Model Degradation It's 2am and I am staring at a routing layer I spent weeks tuning, running a thought experiment that will not let me sleep. The router is doing exactly what I built it to do. Nothing in my code would change, nothing in my config would change, and yet I can see, plain as day, the night this system goes confidently, repeatedly wrong while every line of it stays correct. The failure is already baked in. I just have not been bitten...