import type { MigrationContext, ReversibleMigration } from '../migration-types';
export declare class AddThreadIdToAgentCheckpoints1789717191125 implements ReversibleMigration {
    up(context: MigrationContext): Promise<void>;
    down({ schemaBuilder: { dropIndex, dropColumns }, tablePrefix }: MigrationContext): Promise<void>;
    private backfillThreadIds;
    private backfillCheckpoint;
}