import type { MigrationDb } from "./index";
/**
 * Migration 056: Agent-aware content hash dedupe
 *
 * Summary facts and extracted memories may legitimately share identical
 * content across different agent scopes. Tighten the unique partial index so
 * duplicate content_hash values are only rejected within the same
 * (agent_id, scope) tuple.
 */
export declare function up(db: MigrationDb): void;
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