GROMACS 2026.3 official source testutils/simulationdatabase alanine_vacuo.gro/.top, unmodified here except filenames.
https://gitlab.com/gromacs/gromacs/-/tree/v2026.3/src/testutils/simulationdatabase
GROMACS source LGPL2.1; full license included. Force-field include amber99sb-ildn from installed matching GROMACS environment.
Own CV input/MD settings are a short vacuum teaching model, not a solvated biomolecule PMF.
