node-mermaid - 8.7.0+ds+~cs27.17.17-3+deb11u2 main

sequence diagrams, class diagrams, gantt charts and git graphs.
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It can help visualize flowcharts, diagrams, ganttcharts and git charts can be
scripted in a markdown syntax, with a varitety of different symbols and chart
types available. Since the diagram source is text based,
it can be part of production scipts.
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Automates the diagram generation instead of making it manually.
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Node.js is an event-based server-side JavaScript engine.