As a pedagogical exercise, to help me understand the design, I wrote some Go code to read a sqlite database and dump table contents. I remember having to peek at the source code to figure out a few things that weren't explained well in that document.

I'd previously written code to read the lucene database format (python code that time), which was also a good learning experience. I ended up leveraging some of that knowledge for a work project.

And I've also played around with reading/writing git archives.