import type { MigrationDb } from "./index";
/**
 * Migration 031: Add reason to dependencies, last_synthesized_at to entities
 *
 * - entity_dependencies.reason: LLM-provided explanation of why a
 *   dependency exists, surfaced in the dashboard for auditability.
 * - entities.last_synthesized_at: timestamp tracking when the cross-entity
 *   dependency synthesis worker last processed an entity.
 */
export declare function up(db: MigrationDb): void;
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