ValleyServer is a dual-mainline project that turns Stardew Valley into a persistent, unattended multiplayer server. The 2.x branch (recommended, stable) runs on a real Stardew Valley + SMAPI client, using a set of custom mods (ALOS, ServerCMD, ChatCommand, CommandWebUI, ChangeServerPort) to automate the host farmer—auto-sleeping, skipping cutscenes, handling festivals, and providing a web-based console and Docker deployment. The 3.x branch (experimental) is a standalone headless server that loads decompiled game assemblies via reflection and mocking, implements the Lidgren-based multiplayer protocol, and manages farmhand connections, warps, saving, and day transitions without any graphical client. The 3.x code is architecturally ambitious—using uninitialized objects to bypass XNA dependencies, a custom content manager that returns dummy textures/fonts, and a dedicated overnight coroutine thread—but remains incomplete (missing farming, NPCs, seasons) and is tightly coupled to a specific decompiled game version. The 2.x mods are well-documented and production-tested; the 3.x server is a technical proof-of-concept with hardcoded paths and significant fragility. The repository provides CI/CD for building both branches, issue templates, and a community Docker image.