export declare const SURFACE_HIDDEN_FLAG = "__agentNativeSurfaceHidden";
export declare const SURFACE_VISIBILITY_EVENT = "agentnative:surfacevisibilitychange";
export declare function isHostSurfaceHidden(): boolean;
export declare function isSurfaceHidden(): boolean;
export declare function addSurfaceVisibilityListener(handler: () => void): () => void;
export declare function buildSurfaceVisibilityScript(hidden: boolean): string;