/**
 * Scene JSON serialize / deserialize.
 * Module widgets stay as `{ type, props }` leaves — never expand into visual primitives.
 */
import type { App } from '../App';
import type { Node } from '../Node';
import type { SceneJSON } from '../types';
import { Group } from '../shapes/Group';
type NodeFactory = (props: Record<string, unknown>, app: App) => Node;
/** Options for module-aware scene serialization. */
export interface ToJSONOptions {
    /**
     * Drop identity transforms, empty arrays, null/undefined, and non-JSON metadata.
     * Opt-in so existing full dumps keep working.
     */
    compact?: boolean;
}
export declare function registerJSONType(type: string, factory: NodeFactory): void;
export declare function fromJSON(json: SceneJSON, app: App): Node;
/** Strip defaults / non-JSON noise from a SceneJSON tree (does not mutate input). */
export declare function compactSceneJSON(json: SceneJSON): SceneJSON;
/**
 * Serialize a node for authoring / `loadJSON` round-trip.
 * UI, dashboard, automotive, and diagram roots stay opaque `{ type, props }` leaves.
 * Plain groups recurse with the same rules (fixes stage `exportJSON` expansion).
 */
export declare function toJSON(node: Node, options?: ToJSONOptions): SceneJSON;
/**
 * True when a root `group` is only a bag of children (identity transform, no module type).
 * Used by `loadJSON` to place children on the stage instead of nesting an extra group.
 */
export declare function isHoistableRootGroup(node: Node): node is Group;
/** Authoring-shaped export of stage contents (not the stage node itself). */
export declare function exportStageJSON(stage: Group, options?: ToJSONOptions): SceneJSON;
export {};