  The GENIE neutrino Monte Carlo describes neutrino-induced hadronization with
an effective model, known as AGKY, which is interfaced with PYTHIA at high
invariant mass. Only the low-mass AGKY model parameters were extracted from
hadronic shower data from the FNAL 15 ft and BEBC experiments. In this paper,
the first hadronization tune on averaged charged multiplicity data from
deuterium and hydrogen bubble chamber experiments is presented, with a complete
estimation of parameter uncertainties. A partial tune on deuterium data only
highlights the tensions between hydrogen and deuterium datasets.
