Forest and Caves as one persistent cluster
A complete Don't Starve Together world is not one process. The Forest is the master shard and Caves is a second server process with its own save and public UDP port. GHosting starts, stops and restarts both together, while keeping migration portals and character travel inside one cluster.
That two-shard layout is included on every plan. You do not have to choose between the surface and Ruins content or maintain a second service by hand.
