import type { FontSubsetting } from "../core/types.js";
/**
 * Subset local font using fontkit
 * This requires fontkit to be available at build time
 */
export declare function subsetLocalFont(fontPath: string, outputPath: string, subset?: FontSubsetting): Promise<void>;
/**
 * Get font file size reduction estimate for subsetting
 */
export declare function estimateSubsetReduction(originalSize: number, characterCount: number, totalCharacterCount?: number): {
    originalSize: number;
    estimatedSubsetSize: number;
    reduction: number;
    reductionPercent: number;
};
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