import type { MigrationDb } from "./index";
/**
 * Add prospective indexing: memory_hints table + FTS5 virtual table.
 *
 * At write time, the pipeline generates hypothetical future queries
 * ("hints") for each memory. These are indexed via FTS5 so that
 * search queries match memories by anticipated cue, not just by
 * stored content. Inspired by Kumiho (arXiv:2603.17244).
 */
export declare function up(db: MigrationDb): void;
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