Hi there @jsha, I learned about this project while reading docs for Let's Encrypt. It's a very cool looking project and I'm impressed you were able to do it in one Go file with no dependencies (it's a real testament to the Go standard library too).

I opened this issue because I was interested in taking a crack at a couple of the ideas from the open issues, as a pull request if you're open to it. I didn't see a license in this repo, which is understandable for a small project like this, but would you be open to adding one? GitHub has a nice web site at https://choosealicense.com/ to find one that makes sense for you.

(Disclaimer, I am a GitHubber but this is just out of personal interest and not any kind of official communication from GitHub)