Development & testing

The test suite is hardware-free (vendor libraries are faked) — currently 435 tests.

$ python -m pytest -q
$ python -m build           # dist/*.whl + dist/*.tar.gz
$ python -m twine check dist/*

Release flow: bump the version in both pyproject.toml and aether/__init__.py, commit, clean-build, twine check, verify in a throwaway venv, then upload.