interface CryptoUuidSource {
    randomUUID?: () => string;
    getRandomValues?: (bytes: Uint8Array) => Uint8Array;
}
/** Generate a secure RFC 4122 version 4 UUID across browser Crypto implementations. */
export declare function generateUuid(cryptoImpl?: CryptoUuidSource | null | undefined): string;
/** Generate a unique ID with optional prefix (e.g., "msg-a1B2c3D4e5F6g7H8") */
export declare function generateId(prefix?: string): string;
/** Create an ID generator with fixed prefix and optional configuration */
export declare function createIdGenerator(options: {
    prefix?: string;
    separator?: string;
    size?: number;
}): () => string;
export {};
//# sourceMappingURL=id.d.ts.map