/**
 * Return true if the first ISO PlainDate string represents a date after the second.
 *
 * - Uses Temporal.PlainDate.compare to compare dates.
 * - Returns false if either input is invalid.
 *
 * @param value1 first ISO PlainDate string
 * @param value2 second ISO PlainDate string
 * @returns boolean indicating whether value1 is after value2
 *
 * @example isAfterDate("2024-03-01", "2024-02-29") // true
 * @example isAfterDate("2024-02-28", "2024-02-29") // false
 * @example isAfterDate("invalid", "2024-02-29") // false
 * @example isAfterDate("2024-02-29", "invalid") // false
 */
export declare function isAfterDate(value1: string, value2: string): boolean;