The only tool that I know of that uses YAML for diagrams is Ilograph: https://www.ilograph.com/ https://www.ilograph.com/ But yeah, ASCII for diagrams seems li

The only tool that I know of that uses YAML for diagrams is Ilograph: https://www.ilograph.com/ https://www.ilograph.com/ But yeah, ASCII for diagrams seems like the worst of all worlds: manual layouts, slow to create, impossible to maintain.