import type { SlotRegistryState } from './slot-registry.js';
/**
 * Registers `config` for `slotName` in the slot registry on mount and
 * unregisters on unmount. Re-registers when `config` identity changes.
 *
 * Uses a layout effect so the registration is observable before the next
 * paint — the layout shells (`MainShell`, `HeaderShell`) need to see the
 * registered config in the same commit as the slot component mounts to
 * avoid a frame of unstyled content.
 *
 * Callers must memoize `config` themselves (typically via `useMemo` with an
 * explicit dependency array) so the effect only re-runs when something
 * meaningful changes.
 *
 * @internal
 */
export declare function useRegisteredSlot<K extends keyof SlotRegistryState>(slotName: K, config: NonNullable<SlotRegistryState[K]>): void;