Check where a config value is set/save only values set in the config file or by code

[Feyko]

Hi! I'm writing a cli application with cobra and viper. A problem I'm running into is that if I save the viper config to a config file, it saves the default values I set (which means I can't change the default with an update) as well as things like env vars which imo should be temporary. I'd like to only save values set through code or in the config file
So far it seems I would need to do some legwork and write some custom code to handle that, thankfully viper.InConfig exists, but not something like viper.IsDefault. I could just check if the value is the same as my default but that's also leg work and wouldn't work with setting a key to be explicitly the same value as the default one
Anyway, is there an easy way to do this or to solve this issue? Thanks!