Show HN: Generate Sequence Diagram from Text

Text to sequence diagram can also be done by something called PlantUML (locally installed software in Java, which uses Graphviz).

https://plantuml.com/sequence-diagram

David Moon's implementation of markdown has sequence diagram support (source code in Python, Common Lisp and Lunar):

http://users.rcn.com/david-moon/MMD/HTML/directives.html

same as https://www.websequencediagrams.com/ ?