/**
 * Parse a `--since`/`--until` value: either a relative duration (`30m`,
 * `12h`, `7d`, `2w`, interpreted as "that long ago") or an absolute
 * timestamp accepted by `Date`.
 */
export declare function parseTimeInput(value: string, flagName: string): Date;
/**
 * Resolve `--since`/`--until` flags into an explicit listing window for the
 * analytics runs API, or undefined when neither flag was given (the backend
 * then applies its default window). Windows older than the plan's
 * observability lookback are rejected by the backend with
 * `observability-upgrade-required`.
 */
export declare function resolveTimeWindow(opts: {
    since?: string;
    until?: string;
}): {
    startTime: string;
    endTime: string;
} | undefined;
/**
 * Extract the plan observability-window start from a paginated analytics
 * response, for widening a defaulted (recent-window) listing to the whole
 * window the plan allows. Returns undefined when the response carries no
 * page metadata (e.g. non-Vercel backends).
 */
export declare function planWindowStartFromResponse(result: unknown): string | undefined;
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