Decide whether the repository is ready for code: layout, tooling and configuration exist and a fresh clone can create a local virtual environment.
Decide whether the arithmetic core is correct and tested before the console interface is built on it.
Decide whether the interactive calculator behaves as the lecture describes, including continuing with the result and restarting by recursion.
Decide whether the project can be handed over: a new user can set it up, run it and test it from the README alone.