/**
 * FNV-1a 32-bit hash. Fast, non-cryptographic, browser-compatible.
 */
export declare function computeHash(input: string): string;
/**
 * Deterministic JSON serialization with sorted keys at all levels.
 */
export declare function canonicalSerialize(value: unknown): string;
/**
 * Compute checksum for an entity using only the specified fields.
 * Fields are sorted before hashing to ensure determinism regardless
 * of the order they are passed.
 */
export declare function entityChecksum(entity: Record<string, unknown>, fields: Iterable<string>): string;
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