This resume is stored as JSON following the JSON Resume schema. When changes are committed, GitHub Actions copies the JSON file to a Gist, which is then picked up by the JSON Resume Registry.
There are two CLI tools, resume-cli via NPM and resumed via GitHub, neither of which work great, especially with PDF conversion.
To save the resume as a PDF, first download a theme that will produce a thin rendered page (I recommend the StackOverflow theme). Install the resume-cli tool via NPM, and run resume --theme stackoverflow serve to run a local webserver. Navigate to localhost:4000 and print the page to "Save as PDF".