import type { ChordPlatform } from "./chords.js";
export declare const HELD_MODIFIER_DELAY_MS = 350;
type HeldModifierTracker = {
    subscribe(listener: () => void): () => void;
    held(): boolean;
};
/** One tracker per window and platform; every row reads the same state. */
export declare function createHeldModifierTracker(target: Pick<Window, "addEventListener" | "removeEventListener">, platform: ChordPlatform, timers?: Pick<typeof globalThis, "setTimeout" | "clearTimeout">): HeldModifierTracker;
/** True while ⌘ (Ctrl elsewhere) is held alone; `enabled: false` never listens. */
export declare function useHeldModifier(platform: ChordPlatform, enabled: boolean): boolean;
export {};