/**
 * CSV serialization — ONE quoting rule for every export in the lib and the hub.
 *
 * Beyond RFC-4180 quoting, cells are FORMULA-NEUTRALIZED: a spreadsheet treats a
 * leading `=`, `+`, `-` or `@` as a formula, so an exported value like
 * `=HYPERLINK("http://evil","click")` executes on open (CSV injection). A cell
 * that starts with one of those AND is not a plain numeric literal gets a leading
 * apostrophe, which Excel/Sheets strip on display.
 */
export declare const CSV_CONTENT_TYPE = "text/csv;charset=utf-8;";
/** Quote + neutralize a single cell. */
export declare function csvEscape(value: unknown): string;
export interface CsvColumn<TRow> {
    /** Header text (escaped like any other cell). */
    header: string;
    /** Cell value for a row. */
    value: (row: TRow) => unknown;
}
/** Serialize rows to a CSV document (header + `\n`-joined rows). */
export declare function toCsv<TRow>(rows: readonly TRow[], columns: readonly CsvColumn<TRow>[]): string;
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