Which is a huge limitation of many of the other tools. I have some beef with poetry, but it did at least get one thing correct: differentiating between the code

Which is a huge limitation of many of the other tools. I have some beef with poetry, but it did at least get one thing correct: differentiating between the code required libraries and the development tooling (pytest, black, etc). There are hacky workarounds to accomplish this with other tools, but codifying this differentiation is incredibly valuable.