I'm working on exactly that, using Unix Domain Sockets. Here's my reference implementation: https://crates.io/crates/nip-70
NIP draft coming soon!
Discussion
interesting, why not nip46/remote signer? could be a local daemon.
Yeah good point - the line between NIP-07 and NIP-46 get a bit blurred for me when focusing on desktop. I'm working with nostr:npub1ygzj9skr9val9yqxkf67yf9jshtyhvvl0x76jp5er09nsc0p3j6qr260k2 on the design and our plan is to write up a NIP that uses the same RPCs as NIP-46 but over UDS. Then any key management desktop app could also be a NIP-46 client and essentially be a per-device Nostr hub that can either hold the private key on device or reach out elsewhere.
That's great to hear! Love seeing unconventional approaches being taken. Looking forward to seeing the NIP draft!