Hi, I'm the organizer of the DeclMed workshop. Yes, nearly all the code for the NCATS Biomedical Data Translator is on GitHub, in a variety of project areas. The best place to start is the Translator developer documentation: https://ncatstranslator.github.io/translator-developer-docum...
once you've got an overview, click on the "Developer Guide" tab on the aforementioned page. Please reach out if you have any questions (https://lab.saramsey.org)