import { GameState, Street } from "@pokertools/types";
/**
 * Determine if the game is heads-up (exactly 2 seated players)
 * This checks seated players, not just active in current hand,
 * because heads-up rules apply to the table structure, not hand state
 */
export declare function isHeadsUp(state: GameState): boolean;
/**
 * Get heads-up action order for a given street
 * In heads-up:
 * - Button IS small blind
 * - Button acts FIRST preflop
 * - Button acts LAST postflop
 */
export declare function getHeadsUpActionOrder(state: GameState, street: Street): number[];