/**
 * What AppFrame tells the panel in its `endSidebar` slot, so a tool rail can
 * choose how to show an open panel. Null outside that slot.
 */
export interface AppFrameEndSlotContextValue {
    /** The host's minimum for `<main>`'s inline size, px; undefined for none. */
    minMainWidth?: number;
    /** Px that `<main>` and the end slot share; null until measured or
     *  while `minMainWidth` is unset. */
    sharedWidth: number | null;
    /** True while the end slot is hidden, below `md`. */
    phone: boolean;
    /** Moves focus to `<main>`, for a panel that closes under it. */
    focusMain: () => void;
}
export declare const AppFrameEndSlotContext: import("react").Context<AppFrameEndSlotContextValue | null>;
/** The AppFrame end slot's layout facts, or null outside it. */
export declare function useAppFrameEndSlot(): AppFrameEndSlotContextValue | null;
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