Hosting for the ThreeJS Assets native clients. Each tool gets its own directory, because their ecosystems do not share a file format.
https://extensions.threejsassets.com/blender/index.jsonPackages/manifest.json:https://extensions.threejsassets.com/unitycom.threejsassets · package
com.threejsassets.assets · Unity 6.3 LTS or newer