/**
 * Simple in-memory artifact store shared across commands.
 * Allows middleware and modules to exchange structured data.
 */
export type ArtifactValue<T = unknown> = T;
/**
 * Store an artifact value by key.
 */
export declare function setArtifact<T>(key: string, value: ArtifactValue<T>): void;
/**
 * Retrieve an artifact value by key.
 */
export declare function getArtifact<T>(key: string): ArtifactValue<T> | undefined;
/**
 * Remove an artifact by key.
 */
export declare function deleteArtifact(key: string): void;
/**
 * Clear all stored artifacts.
 */
export declare function clearArtifacts(): void;