  The origin of weakly bound objects like clusters and hypernuclei, observed in
heavy-ion collisions, is of theoretical and experimental interest. It is in the
focus of the experiments at RHIC and LHC since it is not evident how such
weakly bound objects can survive in an environment whose hadronic decay
products point to a temperature of the order of 150 MeV. It is as well one of
the key research topics in the future facilities of FAIR and NICA which are
under construction in Darmstadt (Germany) and Dubna (Russia), respectively. We
present here first results on the cluster dynamics within the model-independent
cluster recognition library "phase-space Minimum Spanning Tree" (psMST) applied
to different transport approaches: PHQMD, PHSD, SMASH and UrQMD. The psMST is
based on the "Minimum Spanning Tree" (MST) algorithm for the cluster
recognition which exploits correlations in coordinate space, and it is extended
to correlations of baryons in the clusters in momentum space. We show the
sensitivity of the cluster formation on the microscopic realization of the
n-body dynamics and on the potential interactions in heavy-ion collisions.
