install.sh places the package in a version independent directory under
XDG_DATA_HOME instead of site-packages, which would be orphaned the day
the distribution moves to a new Python. It verifies the package imports
before reporting success, and warns when the pre-split extension is still
installed alongside it.
pyproject.toml makes pip install --user an equally valid route; the
bootstrap in each plugin finds the package either way.
examples/nemoRepoLastCommit.py is a complete working plugin in sixty
lines, which is the point of the split.
