import type { CodeGraph } from '../model.js';
/**
 * BFS-based shortest path on a CodeGraph.
 *
 * Tries the native Rust implementation first, falls back to JS.
 *
 * @returns Path from fromId to toId (inclusive), or null if unreachable
 */
export declare function shortestPath(graph: CodeGraph, fromId: string, toId: string): string[] | null;
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