Brian, the top level README.md file refers to “tasks_proj” instead of “cards_proj”.
Based on this I grepped for “tasks” and found the word present on line 109 of cards_proj/src/cards/api.py and ch11/cards_proj/src/cards/api.py. Both instances are in the docstring of delete_all but from the context of the other docstrings I think this was intended to be “cards” as well.