/**
 * Produce a canonical JSON string for a Discovery Artifact.
 *
 * Excludes the artifactHash field and other volatile metadata (timestamps,
 * generation timestamps) from serialization so the hash reflects semantic
 * content rather than when the artifact was produced.
 */
export declare function canonicalizeArtifact<T extends Record<string, unknown>>(artifact: T): string;
/** Compute the SHA-256 hash of the canonical artifact serialization. */
export declare function hashArtifact<T extends Record<string, unknown>>(artifact: T): string;