/**
 * ArtifactStore — In-memory + disk-backed artifact storage
 *
 * Manages the pipeline artifacts that flow between agents. Each artifact
 * is versioned so agents can revise earlier outputs.
 */
import type { PipelineArtifact } from './types.js';
export declare class ArtifactStore {
    private artifacts;
    /** Store an artifact, incrementing version if one exists with the same name */
    set(artifact: PipelineArtifact): void;
    /** Get the latest version of an artifact by name */
    get(name: string): PipelineArtifact | undefined;
    /** Get all artifacts */
    getAll(): PipelineArtifact[];
    /** Check if an artifact exists */
    has(name: string): boolean;
    /** Save all artifacts to a directory on disk */
    saveToDisk(dir: string): Promise<void>;
    /** Load artifacts from a directory on disk */
    static loadFromDisk(dir: string): Promise<ArtifactStore>;
    /** Serialize to JSON for pipeline state persistence */
    toJSON(): Record<string, PipelineArtifact>;
    /** Deserialize from JSON */
    static fromJSON(data: Record<string, PipelineArtifact>): ArtifactStore;
}
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