No promises here, but this my personal wishlist for the next release:

Related series of ideas:

• Support session dependencies (requires) #631 - this is the key building block for making one thing depend on other things

Add some helpers to the nox.project namespace for common tasks that have PEPs behind them:

• feat: helper to get dependency-groups #876
• feat: add helper to get the Python listing #877 (followup fix: warning about __main__ already being imported #884)

PEP 723 runner:

• feat: expose main as nox.main #878 - Easier runs via PEP 723
• feat: support PEP 723 noxfiles #881 - This would also users to share code, and even not have to install nox. Also extend using Python packages, like using click or rich inside a session.

Fixes:

• fix: support noxfile being a symlink #829
• fix: error with helpful message if invalid option is set via nox.options #871
• fix: error if invalid reuse_venv set #872
• fix: outer_env issues fixed #874
• fix: allow pypy- to be used (matching GHA) #913
• fix: catch PermissionError from popen when UV is not installed #908
• correct virtualenv bin dir under mingw python #901
• Use uv python install only with uv backend #900
• fix: include encoding for consistent behavior (default in Python 3.15+) #891
• chore: limit the visible items for tab completion #889
• fix(tox-to-nox): switch pkgutil for importlib-resources #887
• fix: validate entries in nox.config, too, using attrs #880 (and fix in fix: over validation of lists #921)
• fix: add a pyproject.toml default for load_toml #917
• fix(gha): drop PyPy from the default list for the GitHub Action #916
• fix: don't trigger a background update process for virtualenv #918
• fix: support broken uv (via pyenv) #922

Cleanup (with fixes):

• chore: limit the visible items for tab completion #889
• chore: more typing and test improvements #890
• chore: add more Ruff checks and fixes #893
• tests: statically type tests #894
• feat: drop support for tox 3 #910
• refactor: pull out env creation into helper method #912
• refactor: pulled out get_virtualenv & better typing #882

Tests

• tests: use tmp_path instead of tmpdir #895
• tests: statically type tests #894
• chore: add more Ruff checks and fixes #893

Longer term, I have ideas about the CLI that might make sense after #167.

Postponed:

• Add ability for many nox tasks to reuse the same session/virtual env #167 - allow @nox.env and then defining sessions for it. Would probably solve a lot of things at once, like custom venv locations and lock file support.
• Allow for easy wheel-sharing #740 - add a "build" job and way to share wheels - could be just an example using the above one or two items.
• Support version specifiers in nox's Python definition #814 - this would also allow PEP 721's requires-python setting to be used.
• Verify 3.13t works well