export type FreshnessConfidence = 'extracted' | 'inferred-url' | 'inferred-html' | 'inferred-llm' | 'unknown';
export interface FreshnessSignal {
    published_date?: string;
    inferred: boolean;
    confidence: FreshnessConfidence;
}
export declare function computeFreshnessSignal(url: string, publishedDate: string | undefined): FreshnessSignal | undefined;
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