HepMC3 validation release for Pythia8.310, H73, EvtGen2.2.1, MG 3.5.3atlas4 and SFGen contains MRs: https://gitlab.cern.ch/atlas/athena/-/merge_requests/68637 Pythia8B_i, Pythia8_i further corrections in the UserHooks setup https://gitlab.cern.ch/atlas/athena/-/merge_requests/68584 Particle gun documentation https://gitlab.cern.ch/atlas/athena/-/merge_requests/68566 Print warning and error thresholds in TestHepMC so that they can be used downstream https://gitlab.cern.ch/atlas/athena/-/merge_requests/68585 Add Generator config flags to prepare move to CA configuration. See !67233 https://gitlab.cern.ch/atlas/athena/-/merge_requests/68512 remove InDetRecExample to avoid warnings https://gitlab.cern.ch/atlas/athena/-/merge_requests/68493 Adding JO example in Pythai8 for the new UserHook https://gitlab.cern.ch/atlas/athena/-/merge_requests/68482 TruthUtils: Fix cppcheck warnings. https://gitlab.cern.ch/atlas/athena/-/merge_requests/68488 GeneratorFilters/DiPhotonFilter: Added a cut-off on the angle deltaR_yy between the two photons https://gitlab.cern.ch/atlas/athena/-/merge_requests/68374 Pythia8_i: fix UserHooks setup https://gitlab.cern.ch/atlas/athena/-/merge_requests/68261 main-coverity-Pythia8_i https://gitlab.cern.ch/atlas/athena/-/merge_requests/68205 Pythia8_i: Don't create stuff in a Gaudi component ctor. https://gitlab.cern.ch/atlas/athena/-/merge_requests/68185 Updating error message to match cut value in EvgenJobTransforms https://gitlab.cern.ch/atlas/athena/-/merge_requests/68173 LCG_104c_ATLAS_5 new layer with sereval new Generators versions https://gitlab.cern.ch/atlas/athena/-/merge_requests/68184 Generators: handle Sherpa 3 in createLibs-job of sherpaTarCreator https://gitlab.cern.ch/atlas/athena/-/merge_requests/68167 Pythia8_i: fixed clang warning https://gitlab.cern.ch/atlas/athena/-/merge_requests/68110 adding new UserHook to compute CKKWL merging DJRs for Pythia8 https://gitlab.cern.ch/atlas/athena/-/merge_requests/68100 Adding to the README file the tutorial on the CKKWL merging UserHook for Pythia8 https://gitlab.cern.ch/atlas/athena/-/merge_requests/67628 Make Input.RunNumber, Input.LumiBlockNumber and Input.TimeStamp in plural as they are used as list https://gitlab.cern.ch/atlas/athena/-/merge_requests/68584 Particle gun documentation https://gitlab.cern.ch/atlas/athena/-/merge_requests/68566 Print warning and error thresholds in TestHepMC so that they can be used downstream https://gitlab.cern.ch/atlas/athena/-/merge_requests/68585 Add Generator config flags to prepare move to CA configuration. See !67233 https://gitlab.cern.ch/atlas/athena/-/merge_requests/68512 remove InDetRecExample to avoid warnings https://gitlab.cern.ch/atlas/athena/-/merge_requests/68493 Adding JO example in Pythai8 for the new UserHook