export declare const UPDATE_HELP = "usage: gws-axi calendar update <event-id> [flags]\nargs[1]:\n  <event-id>             Event ID to update (from `calendar events` or `calendar get`)\nflags[12]:\n  --summary <text>       New event title\n  --start <iso>          New start time (ISO datetime or YYYY-MM-DD for all-day)\n  --end <iso>            New end time\n  --duration <h|m>       Set end relative to (new or existing) start, e.g. \"1h\"\n  --description <text>   Replace description (pass empty string to clear)\n  --location <text>      Replace location\n  --add-attendees <es>   Comma-separated emails to add (merges with existing)\n  --remove-attendees <es> Comma-separated emails to remove\n  --replace-attendees <es> Comma-separated emails \u2014 REPLACES entire attendee list\n  --send-updates <mode>  none | all | externalOnly (default: none)\n  --calendar <id>        Calendar containing the event (default: primary)\n  --account <email>      REQUIRED when 2+ accounts are authenticated\nexamples:\n  gws-axi calendar update abc_123 --summary \"Team sync (rescheduled)\"\n  gws-axi calendar update abc_123 --start 2026-04-22T15:00 --duration 30m\n  gws-axi calendar update abc_123 --add-attendees eve@x.com --send-updates all\nnotes:\n  Uses events.patch \u2014 only specified fields change; everything else stays\n  as-is. If --start is given without --end or --duration, --end stays put\n  (might produce a negative-duration event \u2014 the API will reject).\n  For attendee changes: --add/--remove merge with the existing list via a\n  read-modify-write (two API calls); --replace-attendees overwrites in one.\n";
export declare function calendarUpdateCommand(account: string, args: string[]): Promise<string>;