Our repos can be a lot to wade through. You can see examples of our specific projects here https://18f.gsa.gov/what-we-deliver/ (and each project links to the right repos if you want to see the code/docs)
*I work for 18F
I know elsewhere in the thread you mentioned that you're not on the login.gov team but would you mind passing U2F support and removing SMS as a second-factor auth as a feature request? Thanks :)