2025.02.09 💝

This release improves PEP 723 support, including adding dependencies to the noxfile itself ("plugins"). It adds the long-awaited "requires" option, allowing sessions to require other sessions. And it brings further improvements to the pyproject.toml support, including helpers for dependency-groups and Python version lists.

We'd like to thank the following folks who contributed to this release:

• @btemplep (first contribution)
• @chirizxc (first contribution)
• @davidhewitt (first contribution)
• @gschaffner (first contribution)
• @henryiii
• @oliversen (first contribution)

New features:

• Support PEP 723 noxfiles by @henryiii in #881
• Expose main as nox.main by @henryiii in #878 (followup fix: #884)
• Support session dependencies (requires) by @gschaffner in #631
• Helper to get dependency-groups by @henryiii in #876
• Helper to get the Python listing by @henryiii in #877
• Add a "pyproject.toml" default for load_toml by @henryiii in #917

Bugfixes:

• Correct virtualenv bin dir under mingw python by @davidhewitt in #901
• Allow pypy-* to be used as well for pypy* (matching GHA) by @henryiii in #913
• Don't trigger a background update process for virtualenv by @henryiii in #918
• Include encoding for consistent behavior (default in Python 3.15+) by @henryiii in #891
• Outer env issues fixed by @henryiii in #874
• Support noxfile being a symlink by @henryiii in #829
• Drop PyPy from the default list for the GitHub Action by @henryiii in #916

Bugfixes related to uv support:

• Catch PermissionError from popen when UV is not installed by @btemplep in #908
• Use uv python install only with uv backend by @oliversen in #900
• Handle "uvx" like "uv" by @henryiii in #920
• Support broken uv (via pyenv) by @henryiii in #922

Tox-to-nox script:

• Drop support for tox 3 by @henryiii in #910
• Switch pkgutil for importlib-resources by @henryiii in #887
• Correctly separate command-line arguments by @chirizxc in #906

Improved noxfile validation:

• Error if invalid reuse_venv set by @henryiii in #872
• Error with helpful message if invalid option is set via nox.options by @henryiii in #871 (followup fix: #921)
• Validate entries in nox.config, too, using attrs by @henryiii in #880

Internal changes:

• Add more Ruff checks and fixes by @henryiii in #893
• Cleanup symlink noxfile code by @henryiii in #865
• Drop some type ignores for colorlog by @henryiii in #888
• Limit the visible items for tab completion by @henryiii in #889
• More typing and test improvements by @henryiii in #890
• Some extra simplifications from Ruff by @henryiii in #870
• Use dependency-groups by @henryiii in #873
• Pull out env creation into helper method by @henryiii in #912
• Pulled out get_virtualenv & better typing by @henryiii in #882
• Fix broken mock on CPython 3.12.8+ in tests by @henryiii in #903
• Statically type tests by @henryiii in #894
• Use tmp_path instead of tmpdir in tests by @henryiii in #895