DART 6.19.4 is a focused patch release on the DART 6 LTS line. It restores source builds that disable the OpenSceneGraph GUI component and adds a deterministic configuration gate for that optional-dependency contract. The only additional maintenance change ignores local .omx/ state. Build Keep source builds configurable without OpenSceneGraph when DART_BUILD_GUI_OSG=OFF by skipping the OSG-only dynamic_joint_constraints example before it requests osgText. The ASan configuration now explicitly disables OpenSceneGraph discovery so future regressions fail in CI. (#3391, #3387) Tooling and Docs Ignore local .omx/ state so it is not accidentally committed. (#3391) Full changelog: https://github.com/dartsim/dart/blob/v6.19.4/CHANGELOG.md - Milestone: https://github.com/dartsim/dart/milestone/103?closed=1