What Actually Happens When a Query Hits Your WunderGraph Cosmo Supergraph

A plain-English breakdown for developers migrating from Apollo GraphOS — or just trying to understand Federation for the first time. If you’ve read the WunderGraph Cosmo documentation and still aren’t sure exactly what’s happening when a client query arrives at your supergraph, this is the post you needed first. Federation documentation tends to explain the what — subgraphs, the router, the schema registry — but not the why or the how in plain English. This post fills that gap. By the end, you’l