Hi, AFAIK currently there is no such ability to save the metadata, at least not in a hacky way (e.g. create some Constant blob that has a single Save user that will then be written out as part of the Constant weights). However it should be relatively simple for the backend to do this – just save it to some location on disk, and then in the driver file that loads the weights you can also add your own custom handling to load the file and do with it whatever you need.