export interface DocumentReadability {
    words: number;
    sentences: number;
    /** Flesch reading ease; higher is easier. Null when there is no prose. */
    fleschReadingEase: number | null;
    /** Flesch-Kincaid grade level. Null when there is no prose. */
    fleschKincaidGrade: number | null;
    /**
     * Automated Readability Index, a grade level from exact character counts --
     * no syllable heuristic. Null when there is no prose.
     */
    automatedReadabilityIndex: number | null;
}
export declare function computeDocumentReadability(content: string, options?: {
    markdoc?: boolean;
}): DocumentReadability;
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