/**
 * DI Graph Serializer
 *
 * Deterministic serialization for design.json: every collection sorted, no
 * timestamps, workspace-relative posix paths only — so the committed file is
 * byte-identical across regenerations of an unchanged graph.
 */
import { DiGraph } from './model';
/** Sort all graph collections in place (stable output order). */
export declare function sortGraph(graph: DiGraph): DiGraph;
/** Serialize a (sorted) graph to the design.json file content. */
export declare function toDesignJson(graph: DiGraph): string;