/** Milkdown slash plugin for the `@` mention autocomplete menu (not Crepe's `/` slash). */
export declare const mentionSlash: import('@milkdown/plugin-slash').SlashPlugin<"BRAINFISH_MENTION", any>;
export type MentionSlashApi = {
    isOpen: () => boolean;
    nav: (direction: 'next' | 'prev') => void;
    pick: () => boolean;
    dismiss: () => void;
};
/** Imperative control of the open mention menu (keyboard handler + React view). */
export declare const mentionSlashApi: import('@milkdown/utils').$Ctx<MentionSlashApi, "mentionSlashApi">;