import type { DelayOptions } from './delay.js';
/**
 * Parses an interval-style string from CLI arguments into a number or DelayOptions.
 * @param intervalString - The string to parse
 * @param fieldLabel - Optional label embedded in error messages so the same
 *   parser can serve multiple CLI flags (e.g. "interval", "scroll-distance")
 *   while surfacing a context-aware error to the user. Defaults to "interval".
 * @returns Parsed value as number (fixed) or DelayOptions (random range)
 * @throws {Error} if the string format is invalid
 * @example
 * parseInterval("1000") // Returns 1000
 * parseInterval("500-1000") // Returns { random: { min: 500, max: 1000 } }
 * parseInterval("abc", "scroll-distance") // throws "Invalid scroll-distance format: ..."
 */
export declare function parseInterval(intervalString: string | undefined, fieldLabel?: string): number | DelayOptions | undefined;