import type { SlotRegistryState } from './slot-registry.js';
/**
 * Registers `entry` for `slotName` in the slot registry on mount and
 * unregisters on unmount. Re-registers when `entry` 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 entry in the same commit as the slot component mounts to avoid
 * a frame of unstyled content.
 *
 * Callers must keep `entry` referentially stable, which is what `useSlotEntry`
 * is for, so the effect only re-runs when something meaningful changes.
 *
 * Each caller registers under an owner identity that lives as long as the
 * component instance, so a cleanup that runs after a replacement has already
 * claimed the slot cannot clear the live registration.
 *
 * @internal
 */
export declare function useRegisteredSlot<K extends keyof SlotRegistryState>(slotName: K, entry: NonNullable<SlotRegistryState[K]>): void;
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