BestHTTP.SocketIO: Socket.On/Off/Emit + SocketIOCallback delegate, SocketManager ctors/
State/Socket/indexer/Open/Close/SettingRealtimeNetworkAgent, SocketOptions. Spine: Skeleton
(Data/Skin/Scale/FindBone/SetSkin/Update), Bone (WorldX/Y/RotationX), SkeletonMecanim
(MonoBehaviour + skeleton). All minimal hand shims (no full-surface -> no SDK closure pull);
node-socket path is Phase-2, off the battle path.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>