/**
 * Plain-prose text statistics feeding the readability formulas in
 * `formulas.ts`. This module is pure -- no rules/, core/runner, or config/
 * imports, and no markdown parsing: callers (e.g. the `metric` assertion)
 * extract a plain prose string out of markdown first.
 */
export interface TextStatistics {
    words: number;
    sentences: number;
    syllables: number;
    /** Letters + digits only -- excludes punctuation and whitespace. Used by the automated-readability and coleman-liau formulas. */
    characters: number;
    /**
     * Words with 3+ syllables per the `countSyllables` heuristic below (no
     * proper-noun or suffix carve-outs).
     */
    complexWords: number;
}
export declare function tokenizeWords(prose: string): string[];
/**
 * Computes word/sentence/syllable/character/complex-word statistics for a
 * plain prose string. `sentences` is delegated to `scopes/sentences.ts`'s
 * `splitSentences` so the whole codebase shares one sentence-boundary
 * definition.
 */
export declare function computeTextStatistics(prose: string): TextStatistics;
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