Frost and Bunker are signing tools. Cold Root Identity is about how identity survives compromise over time. Different layer of the stack.
Frost or Bunker could implement it cleanly, but the article is about fixing the identity failure mode, not choosing a signer.
Yeah, but they are pretty decent options. You can use amber and then you have a cold nsec. You can also keep it hot and then rotate that "secret".
They improve key hygiene, not identity survivability. CRI separates authority from usage so compromise doesn’t end the identity. They are solving different problems.
