/**
 * Phase 6 — materialise persistent :BACKLINKS edges (Task 596).
 *
 * For every (src)-[:MENTIONS|REFERENCES]->(tgt) pair scoped to accountId,
 * MERGE (tgt)-[:BACKLINKS]->(src). MERGE is idempotent — re-running
 * produces no duplicate edges and only newly-created edges set createdAt.
 *
 * proposed = total (src,tgt) pairs found in forward direction.
 * applied  = total BACKLINKS edges after the MERGE (new + pre-existing;
 *            Cypher cannot distinguish ON CREATE count from total in a
 *            single MERGE pass without APOC).
 */
import type { PhaseContext, PhaseResult } from "./index.js";
export declare function phaseBacklinks(ctx: PhaseContext): Promise<PhaseResult>;
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