Does it support smart cards and such devices?
@wiktor-k is working on a tool to use rpgp to provide a simple solution to work with smartcards
Overall I'm pretty happy with the codebase.
The PoC for using cards in git is in https://github.com/wiktor-k/monkeybagel (excuse the silly name ;).
On Windows and Mac it binds to system libraries. On Linux it works with pcsclite.
Btw I'm not aware of any tooling that's used by Sequoia, rather wrappers that use Sequoia and pcsc crate.