import type { ContentSlotConfig, DetailsSlotConfig, HeaderSlotConfig, SidebarSlotConfig } from './slot-config.js';
import type { DetailsLayoutContextValue } from '../details-layout/DetailsLayoutContext.js';
/** @internal */
export interface SlotRegistryState {
    header: HeaderSlotConfig | null;
    sidebar: SidebarSlotConfig | null;
    content: ContentSlotConfig | null;
    details: DetailsSlotConfig | null;
    /**
     * Bridge: `DetailsLayoutInner` publishes its context value here so
     * `PageLayoutDetails` can re-provide it around its portal. The provider
     * placed by `DetailsLayoutInner` only covers the split/overlay DOM it
     * renders, not the portaled `PageLayout.Details` children which live in a
     * different React subtree. This is a context value, not a slot config; it
     * piggybacks on the registry's pub/sub to avoid a second primitive.
     */
    detailsLayoutContext: DetailsLayoutContextValue | null;
}
/** @internal */
export interface SlotRegistry {
    subscribe: (listener: () => void) => () => void;
    getSnapshot: () => SlotRegistryState;
    register: <K extends keyof SlotRegistryState>(slot: K, config: NonNullable<SlotRegistryState[K]>) => void;
    unregister: (slot: keyof SlotRegistryState) => void;
}
/** @internal */
export declare function createSlotRegistry(): SlotRegistry;