[ecma]

You realize that /dev/ is for devices, not developers, right? The title of the OP is fairly misleading because of that.

Otherwise, an interesting project. I'd be interested to know why you chose Python and if/how you protect against code poisoning on the user's machine.

[ape4]

I was expecting

    echo give 5 bitcoin to mike > /dev/bitcoin
    head /dev/bitcoin       shows recent translations

[cyphar]

Someone should write that. It shouldn't be too bad (but it would be ugly, since you'd probably have to write either something in FUSE and do some horrible bindmount magic or create a kernel module that would then have to call out to userspace).