garnet/bin/vsock_service/meta/vsock_service.cmx

{
    "program": {
        "binary": "bin/vsock_service"
    },
    "sandbox": {
        "dev": [
            "class/vsock"
        ],
        "services": [
            "fuchsia.logger.Log",
            "fuchsia.logger.LogSink"
        ]
    }
}