export type SanitizeFlag = 'empty' | 'control_chars_removed' | 'zero_width_removed' | 'whitespace_collapsed' | 'truncated' | 'non_ascii_normalized';
export interface SanitizeHeaderResult {
    clean: string;
    flags: SanitizeFlag[];
    normId: string;
}
export interface SanitizeHeadersResult {
    headers: string[];
    meta: {
        rawByIndex: string[];
        flagsByHeader: Record<string, SanitizeFlag[]>;
        normIds: string[];
        duplicates: Array<{
            normId: string;
            originals: string[];
        }>;
    };
}
export interface SanitizeSampleRowsResult {
    rows: Record<string, string>[];
    meta: {
        truncatedCells: number;
        suspiciousCells: number;
    };
}
export declare function sanitizeHeader(raw: string, maxLen?: number): SanitizeHeaderResult;
export declare function sanitizeHeaders(headers: string[], maxLen?: number): SanitizeHeadersResult;
export declare function sanitizeSampleRows(rows: Record<string, string>[], options?: {
    maxCellLen?: number;
    maxRows?: number;
}): SanitizeSampleRowsResult;