export declare function createKeywordCoverageScorer(): import("@mastra/core/evals").MastraScorer<"keyword-coverage-scorer", import("@mastra/core/evals").ScorerRunInputForAgent, import("@mastra/core/evals").ScorerRunOutputForAgent, Record<"preprocessStepResult", {
    result: {
        referenceKeywords: Set<string>;
        responseKeywords: Set<string>;
    };
    referenceKeywords?: undefined;
    responseKeywords?: undefined;
} | {
    referenceKeywords: Set<string>;
    responseKeywords: Set<string>;
    result?: undefined;
}> & Record<"analyzeStepResult", {
    totalKeywordsLength: number;
    matchedKeywordsLength: number;
}> & Record<"generateScoreStepResult", number>>;
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