import type { MigrationDb } from "./index";
/**
 * Migration 050: MEMORY.md rolling-window lineage
 *
 * Adds:
 * - richer summary job metadata so session-end and checkpoint flows can
 *   preserve canonical timing/identity context
 * - canonical markdown artifact index + FTS table for rebuildable lineage/search
 * - tombstones so privacy removals survive re-index
 */
export declare function up(db: MigrationDb): void;
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