Robot manipulator / end-effector model catalog for botrail. - Browse it visually — thumbnails, datasheets, 3D with joint sliders: - Each package ships normalized URDF / USD (usdc) / GLB / collision meshes with per-file license records and a validation report (levels V0-V5). - distribution: recipeonly packages publish metadata + thumbnail only (upstream licenses do not permit redistributing the sources). One that a newer public revision of the same product replaces is not listed.