A Developer's Checklist for Multi-Model LLM Routing

I wrote an intro to AI API gateways on Medium last week. This is the practical follow-up: the checklist I wish I had before I built AllToken. Built AllToken for all developers. Many models, one decision. But that decision only makes sense if your routing layer doesn't become a nightmare to maintain. After managing five different provider SDKs in production — and watching our internal abstraction layer grow into its own microservice — I realized there's a standard checklist every team should run...