digraph PhysicalTopology {
  graph [rankdir=LR, fontname="Helvetica", nodesep=1.0, ranksep=1.5];
  "placeholder:inventory" [shape=note, style="filled", fillcolor="#fef3c7", label="Host inventory JSON not found.\nGenerate terraform inventory and rerun scripts/docs/generate-all.sh\n(--host-inventory <path>)."];
}