contains MRs: https://gitlab.cern.ch/atlas/athena/-/merge_requests/66402 main-cppcheck-TruthIO https://gitlab.cern.ch/atlas/athena/-/merge_requests/66490 TruthRivetTools+IsolationCorrections: Fix cppcheck warnings. https://gitlab.cern.ch/atlas/athena/-/merge_requests/66491 Pythia8EnvironmentConfig add the definition of LHAPDF_INSTAL_PATH https://gitlab.cern.ch/atlas/athena/-/merge_requests/66316 Clean-up: Rename GenParticleSimWhiteList to GenParticleSimAcceptList https://gitlab.cern.ch/atlas/athena/-/merge_requests/66523 Herwig7_i: Some updates for the ConfigChecker https://gitlab.cern.ch/atlas/athena/-/merge_requests/66549 [AGENE-2233] Introduction of bblvlv_modified https://gitlab.cern.ch/atlas/athena/-/merge_requests/66566 New common jO fo aMC@NLO+Pythia8 https://gitlab.cern.ch/atlas/athena/-/merge_requests/66590 updated lhapdf-config to use simpler logic https://gitlab.cern.ch/atlas/athena/-/merge_requests/66598 GeneratorObjects: Avoid atomic operations on shared_ptr. https://gitlab.cern.ch/atlas/athena/-/merge_requests/66711 Herwig7_i: Change the default tune to the up-to date value https://gitlab.cern.ch/atlas/athena/-/merge_requests/66740 TheP8I: add configuration modules https://gitlab.cern.ch/atlas/athena/-/merge_requests/66757 PYTHIA8: define PYTHIA8DATA environment variable https://gitlab.cern.ch/atlas/athena/-/merge_requests/66771 Herwig7_i; Add new options for the matchbox running mode https://gitlab.cern.ch/atlas/athena/-/merge_requests/66645 Add switch for Pythia_i INFO about (merging) efficiency