Agent Skills: unity-scene-contracts

Scene composition contract advisor for Unity. Use when users want to define required scene objects, component dependencies, bootstrap logic, or reference wiring rules. Triggers: scene contract, bootstrap, required references, scene wiring, scene dependencies, what must be in the scene, 场景契约, 场景装配, 场景依赖, 场景里必须有什么, 引用怎么连.