Skaffold is a command-line tool that automates the Kubernetes development workflow. It watches your source code, automatically rebuilds containers, pushes them to a registry, and deploys to a Kubernetes cluster. You edit code, save, and within seconds your changes are running in Kubernetes. Skaffold handles the tedious parts (docker build, docker push, kubectl apply), letting you focus on development. Skaffold works with local clusters (Docker Desktop, Minikube) and remote clusters (GKE, EKS). It's opinionated but flexible: you can customize build, push, and deploy strategies.