Simple fswatch-er to trigger the checklist each time a file change (for check_list_simplenote see gist https://gist.github.com/kidpixo/9df8fc3298dfe84dc176)

fswatch_checklist

fswatch -rx  $checklist_path | while read event
    set actual_pane_width (tmux list-panes | grep '(active)' | sed 's/^.: \[\(.*\)x.*/\1/')
    # actual_pane_width + 11 take in account invisible ASCII escape characters
    # used for color in check_list_simplenote
    check_list_simplenote | cut -c 1-(echo $actual_pane_width"+11" | bc)
    repeat = $actual_pane_width
    repeat \n 5
end