There isn't an architecture diagram, and there should be. Thanks.
Tilt replaces `docker build && kubectl apply` or `docker-compose`. It watches your files, updates automatically, and gives you a UI that shows you error so you don't have to spelunk with kubectl.
It uses minikube or docker-for-desktop or a cloud k8s cluster (AKS, EKS, GKE, whatever).
It's like skaffold or draft or garden.
Does that help?