A small utility library for s&box games. It adds attributes for identifiers and localization keys, collection and UI panel helpers, scene and trace helpers, a GameObject clone-and-spawn helper, editor-only logging, and generic singleton base components for runtime and UI panels. The code is split into Code/ and top-level mirrors with mostly identical extensions and patterns.
Unit test bootstrap for the library. It initializes Sandbox.TestAppSystem before tests and shuts it down after all tests complete.