You are propably looking for this: Dustcloud Repo ;)
This repo contains all source codes that are required to run the Dustcloud implementation and to create custom firmware / audio images for your robot.
Documentation (Photos, Datasheets) for Xiaomi devices can be found in a seperate repository: Dustcloud-documentation Repo
ReCon BRX 2018 Talk Update
(12 February 2018)
Our slides of the ReCon are now uploaded media.ccc.de