import type { PIArtifactRecord, PIArtifactStore } from './pi-artifact.js';
export declare class MemoryPIArtifactStore implements PIArtifactStore {
    private readonly artifacts;
    private readonly idempotencyIndex;
    private static idempotencyKey;
    createArtifact(record: PIArtifactRecord): Promise<PIArtifactRecord>;
    upsertArtifact(record: PIArtifactRecord): Promise<PIArtifactRecord>;
    getArtifactById(artifactId: string): Promise<PIArtifactRecord | null>;
    listBySourceTaskId(sourceTaskId: string): Promise<PIArtifactRecord[]>;
    listLineage(artifactId: string): Promise<PIArtifactRecord[]>;
    updateValidationStatus(artifactId: string, validationStatus: PIArtifactRecord['validationStatus']): Promise<boolean>;
}
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