We also maintain a shamirs CLI called horcrux here: https://gitlab.com/unit410/horcrux https://gitlab.com/unit410/horcrux We decided to use Hashicorp vault's

We also maintain a shamirs CLI called horcrux here: https://gitlab.com/unit410/horcrux https://gitlab.com/unit410/horcrux We decided to use Hashicorp vault's implementation of Shamirs which was the most widely used / battle tested golang implementation we could find.