Markdown processing (based on pulldown-cmark), recognizes
[tracey](https://github.com/bearcove/tracey) rules, uses
[arborium](https://github.com/bearcove/arborium) for syntax highlighting,
[aasvg-rs](https://github.com/bearcove/aasvg-rs) and
[pikru](https://github.com/bearcove/pikru) for diagrams.
Used by [dodeca](https://github.com/bearcove/dodeca) and
[tracey](https://github.com/bearcove/tracey)