The implementation of minipgp6 is documented in detail on: https://codeberg.org/minipgp6/making That repo contains the series "making minipgp", which consists of articles and videos. It will gradually cover the full minipgp6 stack. The series starts at the lowest layers, and will work its way up through minipgp6's modules. Once complete, the series will fully cover the implementation of this minimal #OpenPGP stack.