Hey HN! Co-creator here. We originally launched this course for free back in April. We ended up getting over 1k sign ups which felt pretty great.

Fast forward six months later, we decided to remove sign-ups to completely erase the friction to access the content.

We use Rust and mdbook to generate the course layout. In addition to some nifty features like additional color schemes, anyone can now contribute to the course and put up a PR with their suggestions!

Hope y’all enjoy!