AutosaveOnRun (Unity Editor Script)

using UnityEditor;

[InitializeOnLoad]
public class AutosaveOnRun {
    static AutosaveOnRun() {
        EditorApplication.playmodeStateChanged = ()=> {
            if (EditorApplication.isPlayingOrWillChangePlaymode && !EditorApplication.isPlaying) {
                EditorApplication.SaveScene();
                EditorApplication.SaveAssets();
            }
        };
    }
}