It's just luck that it works — 74.5% of 455 AI libraries were importing dependencies not listed in requirements.txt

Yet, it's a ModuleNotFoundError in CI. When you ask an AI agent to 'set this up and run it,' it stops at the very first step.

How to use Python on Mac without cluttering your environment | Differences between venv, pyenv, and uv

When you start using Python on a Mac, you will encounter these terms quite early on. venv pyenv uv pip Homebrew .venv Python ...