It is remarkable what this team achieved in terms of how lightweight it feels, the shape and portability of the code-base and how high quality and full featured

It is remarkable what this team achieved in terms of how lightweight it feels, the shape and portability of the code-base and how high quality and full featured it is, given the complexity of the domain. IMHO, it deserves to be in the http://aosabook.org http://aosabook.org series as open-source code-bases you would read and learn from.