It’s all internal, unfortunately. It essentially cobbles together markdown documents into a processing pipeline that ultimately makes a PDF. Pandoc does a lot of the heavy lifting getting it all into Latex before PDFing. We have lots of quality of life features around figures, findings, and all the things you expect in a professional report. We use Python doit, and other things to sequence out markdown fragment assembly. We have plugins for processing tool output into markdown and it will run Python and R files that generate markdown as a part of the processing pipeline so you can programmatically generate any content your heart desires. Just to give an idea of tooling :)