A small multiplayer helper library for s&box games. It spawns a lobby, creates player entities on connect, tracks name, health, money and team, and runs a start/stop round timer with RPCs. Implemented as Server and Player components that spawn prefabs and sync state, plus an empty marker component.
Adds an Editor menu item that pops a dialog saying "It worked!" with a short message. Implemented as a static editor-only class that registers a menu command and shows a message box when clicked.
Unit tests for a library. A test bootstraps Sandbox.TestAppSystem for the test run, then a test creates a Scene, pushes it on the stack, spawns a GameObject, and asserts the scene directory sees one object.