digraph {
  console_forwarder [label = < <B>console_forwarder</B> >, penwidth = 2]
  host_console_in [label = "internal/console.in", shape = "rectangle"]
  host_console_out [label = "internal/console.out", shape = "rectangle"]
  host_pty [label = "/dev/pty/###", shape = "rectangle"]
  run_cvd
  screen
  user [label = "User CLI"]
  vmm [label = "crosvm / qemu"]
  subgraph cluster_android {
    label = "Android VM"
    vm_console [label = "/dev/ttyS0", shape = "rectangle"]
    shell [label = "toybox / sh"]
  }

  run_cvd -> console_forwarder
  user -> screen
  screen -> host_pty -> console_forwarder [dir = "both"]

  console_forwarder -> host_console_out -> vmm [dir = "back"]
  console_forwarder -> host_console_in -> vmm

  vmm -> vm_console -> shell [dir = "both"]
}