Unity 6000.3 profile guide — Configure the exact Unity Generic/Humanoid profiles, importer advice, root-motion choices, and scale boundary.
Unreal Engine 5.8 profile guide — Map FBX animation, Skeleton, frame, unit, root-motion, and scale concerns to AnimSmith evidence without inventing importer settings.
Godot 4.7 profile guide — Plan scene import, retargeting, animation slicing, root scale, and the current profile's explicit prediction boundary.
Bevy 0.19.0 profile guide — Generate exact Animation{i} selector evidence and keep runtime loading, graph, target, and scale responsibilities explicit.
glTF and generic runtime guide — Use the engine-neutral contract for custom runtimes, glTF units, source identity, scale repair, and downstream validation.