Loïc Faugeron has started off a new series of posts with an introduction to a "Mars Rover" exercise that aims to help you refactor a "monolithic" codebase with CQRS, event sourcing and TDD practices.

In this introductory article, we're simply going to describe our Mars Rover specifications.

Note: This programming exercise originally comes from Dallas Hack Club, which is now unfortunately down. This Mars Rover kata has been adapted for the needs of this series.

He starts by outlining the goals the software will need to achieve and the complete functionality to provide. This is just the series kickoff though, so there's not much by way of code. Next in the series is the "MonoRepo" section and the setup of the actual project.