> add a `pyproject.toml` with all of your deps

Or put your dependencies inline in the script (https://packaging.python.org/en/latest/specifications/inline...), and it's just a single file script again. But with dependency support

EDIT to clarify it was just the pyproject.toml that inline metadata could replace

Again, you're creating a new session with special environmental variables. It's nice that it uses pyproject.toml (well, except for the toml part), but it still needs uv.

I was suggesting that the Python executable have this sort of functionality built in, with no need for a new session.