The article wasn't clear on exactly what blueprint does, and I didn't know, so I did some digging in their README.
"blueprint is DevStructure's workhorse tool that looks inside popular package managers, finds changes you made to configuration files, and archives software you built from source to generate Puppet, Chef, or shell code. Everything blueprint sees is stored in Git to be diffed and pushed. It runs on Debian and RPM based distros with Python 2.6."
Seems pretty cool, glad I looked.