You can always specific specific IdentityAgents in ~/.ssh/config for hostnames, to limit Secretive to specific hosts, but you are right, the cross platform supp

You can always specific specific IdentityAgents in ~/.ssh/config for hostnames, to limit Secretive to specific hosts, but you are right, the cross platform support is completely missing. However, I feel good knowing my private key can't be exfiltrated from my laptop, which is a guarantee that 1Password can't make at all.