/**
 * Key name normalization + platform key tables.
 *
 * Chord notation: "cmd+c", "ctrl+shift+t", "enter", "alt+F4".
 * Modifier aliases: cmd/command/meta/super/win -> "meta", option/alt -> "alt",
 * control/ctrl -> "ctrl", plus the unicode glyphs ⌘ ⌥ ⇧ ⌃.
 */
export type ModifierToken = "ctrl" | "shift" | "alt" | "meta";
/** macOS virtual keycodes for common keys (kVK_* from Events.h). */
export declare const MACOS_KEYCODES: Record<string, number>;
/** Shifted ASCII char -> base key (typed with FLAG_SHIFT). */
export declare const MACOS_SHIFTED: Record<string, string>;
/** CGEventFlagMask values. */
export declare const MACOS_MODIFIER_FLAGS: Record<ModifierToken, number>;
/** Windows virtual-key codes. */
export declare const WINDOWS_VK: Record<string, number>;
export declare const WINDOWS_MODIFIER_VK: Record<ModifierToken, number>;
/** X keysym names for xdotool/wtype. */
export declare const XDOTOOL_KEYS: Record<string, string>;
export declare const XDOTOOL_MODIFIERS: Record<ModifierToken, string>;
export declare function asModifier(raw: string): ModifierToken | null;
/** Normalize a key name; returns the input lowercased when unknown (callers decide what to do). */
export declare function normalizeKey(raw: string): string;
export declare function isModifierToken(raw: string): boolean;
/**
 * Parse a chord like "cmd+shift+t" into modifiers + final key.
 * Returns null for empty input or multiple non-modifier keys.
 */
export declare function parseChord(raw: string): {
    modifiers: ModifierToken[];
    key: string;
} | null;
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