import { CheckpointArtifact } from './CheckpointArtifact.ts';
/** Carries the writer frontier for checkpoint recovery. */
export declare class FrontierArtifact extends CheckpointArtifact {
    readonly frontier: Map<string, string>;
    constructor({ schemaVersion, frontier }: {
        schemaVersion: number;
        frontier: Map<string, string>;
    });
}
