usage:  smsg [-OTLPF]
    smsg [-o <output>] -s [-t <tags>] [-l <layout>] [-c <tags>]
    smsg [-o <output>] (-g | -w) [-FOotlcvmf]

options:
-g  get
-s  set
-w  watch
-O  get all outputs
-T  get number of tags
-L  get all available layouts
-P  get compositor pid
-F  get focused output
-o  select output
-t  get/set selected tags (set with [+-^.], overwrite with ! prefix)
-l  get/set current layout
-c  get title and appid of focused client
-v  get visibility of statusbar
-m  get fullscreen status
-f  get floating status

examples:
    # act like dwl stdout
    smsg -w
    # watch focused client appid and title
    smsg -w -c
    # get currently focused output
    smsg -F
    # watch for focused output changes
    smsg -w -F
    # get all available outputs
    smsg -O
    # watch available outputs
    smsg -w -O
    # select tag 1, deselect tag 2, toggle tag 4 on output eDP-1
    smsg -o eDP-1 -s -t +-.^
    # toggle tag 3, overwriting current tagset (yes, zero-indexed)
    smsg -t !2^
    # select tag 8 on current output
    smsg -s -t 7
    # deselect tag 8 on current output
    smsg -s -t 7-
    # switch to first layout (order given by smsg -L)
    smsg -l 0
    # switch to floating layout
    smsg -l '><>'