/**
 * Focus Helpers - Convenient APIs for common state mutations.
 *
 * This module provides:
 * - Reducer helpers (toggle, increment, etc.) for use with list.set() and map.set()
 * - Re-exports list() and map() from their dedicated modules
 */
export { list, disposalGroup, getNamedGroup, type ListOptions, type FocusList, type DisposalGroup, type FocusAutoDispose, type FocusAutoDisposeOptions, } from './list';
export { map, type MapOptions, type FocusMap } from './map';
/**
 * Toggle a boolean value. Works with undefined (treats as false).
 *
 * @example
 * ```ts
 * list.set(0, toggle());        // toggles item at index 0
 * map.set('active', toggle());  // toggles 'active' key
 * ```
 */
export declare function toggle(): (prev: boolean | undefined) => boolean;
/**
 * Increment a number by a given amount (default: 1).
 *
 * @example
 * ```ts
 * map.set('count', increment());     // +1
 * map.set('count', increment(5));    // +5
 * ```
 */
export declare function increment(amount?: number): (prev: number | undefined) => number;
/**
 * Decrement a number by a given amount (default: 1).
 *
 * @example
 * ```ts
 * map.set('count', decrement());     // -1
 * map.set('count', decrement(5));    // -5
 * ```
 */
export declare function decrement(amount?: number): (prev: number | undefined) => number;
/**
 * Multiply a number by a factor.
 *
 * @example
 * ```ts
 * map.set('price', multiply(1.1));  // increase by 10%
 * map.set('price', multiply(2));    // double
 * ```
 */
export declare function multiply(factor: number): (prev: number | undefined) => number;
/**
 * Divide a number by a divisor.
 *
 * @example
 * ```ts
 * map.set('price', divide(2));  // halve
 * ```
 */
export declare function divide(divisor: number): (prev: number | undefined) => number;
/**
 * Clamp a number within min/max bounds.
 *
 * @example
 * ```ts
 * map.set('volume', clamp(0, 100));  // ensure 0-100
 * ```
 */
export declare function clamp(min: number, max: number): (prev: number | undefined) => number;
/**
 * Append string to existing value.
 *
 * @example
 * ```ts
 * map.set('log', append('\n' + message));
 * ```
 */
export declare function append(suffix: string): (prev: string | undefined) => string;
/**
 * Prepend string to existing value.
 *
 * @example
 * ```ts
 * map.set('path', prepend('/prefix'));
 * ```
 */
export declare function prepend(prefix: string): (prev: string | undefined) => string;
/**
 * Shallow merge object properties.
 *
 * @example
 * ```ts
 * map.set('user', merge({ name: 'John' }));
 * map.set('settings', merge({ theme: 'dark' }));
 * ```
 */
export declare function merge<T extends object>(partial: Partial<T>): (prev: T | undefined) => T;
/**
 * Reset to a default value (ignores previous).
 *
 * @example
 * ```ts
 * map.set('count', reset(0));
 * map.set('items', reset([]));
 * ```
 */
export declare function reset<T>(defaultValue: T): (prev: T | undefined) => T;
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