/**
 * Calculate bone weight (秤骨算命) from a solar datetime.
 * The Yuan Tiangang method assigns weight values to birth year, month, day, and hour.
 */
export declare function calculateBoneWeight(solarDatetime: string): {
    totalWeight: number;
    unit: string;
    percentile: number;
    breakdown: {
        year: {
            ganzhi: string;
            weight: number;
        };
        month: {
            lunarMonth: number;
            weight: number;
        };
        day: {
            lunarDay: number;
            weight: number;
        };
        hour: {
            earthBranch: string;
            weight: number;
        };
    };
    poem: string;
    interpretation: string;
};