/**
 * Core CSV parsing and escaping — RFC 4180 compatible with formula-aware quoting.
 */
/** Escape a value for CSV output. Quotes values containing commas, quotes, newlines, or leading `=`. */
export declare function escapeCSV(value: string): string;
/** Parse a single CSV line into an array of trimmed cell values. Handles quoted fields and escaped quotes. */
export declare function parseCSVLine(line: string): string[];
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