/** Letter index reserved for the GADDAG separator (◇). */
export declare const SEPARATOR = 0;
/** Letters are stored on 6 bits (1..63); 0 is the separator. */
export declare const MAX_LETTERS = 63;
/** Words longer than this are skipped — they cannot fit on any board. */
export declare const MAX_WORD_LENGTH = 63;
/** Arc label bit marking the last arc of a state. */
export declare const LAST_ARC_FLAG = 128;
/** Mask extracting the letter from an arc label. */
export declare const LETTER_MASK = 63;
/** "GDG1" magic number opening the binary serialization format. */
export declare const MAGIC = 826754119;