Can you use GPG-agent for non-resident passkey challenges?
I also have Yubikey setup, but haven't thought of this.
It can not. Doesn't work with PKCS#11 PIV. In general GPG's behavior with SmartCards is idiotic and interferes with many other applications.
It's good that people don't use GPG more often and I can just purge it from my systems.
Can you do this with Age? If not, then I am going to stick to GPG.
Can Age interfere with all SmartCard usage? No clue.
Age doesn't do signing, key infrastructure, or email. Minisign/signify only sign. None are GPG replacements. They're partial feature subsets that are simpler because they do less.
So, to summarize these tools:
- Age: Only does file encryption, no signing, no key management infrastructure, no email integration
- Minisign/Signify: Only signing, no encryption
- GPG: Encryption, signing, key management, email integration, multiple recipients, subkeys, revocation certificates, web of trust (even if unused), smart card support, etc.
You cannot just simply switch from GPG to Age unless you are only doing file encryption. If this is the case, then sure, you can.
[1]: https://manpages.debian.org/trixie/gpgme-json/gpgme-json.1.e...