garnet/go/src/amber/meta/amberctl.cmx

{
    "program": {
        "binary": "bin/amberctl"
    },
    "sandbox": {
        "services": [
            "fuchsia.amber.Control",
            "fuchsia.logger.LogSink",
            "fuchsia.net.SocketProvider",
            "fuchsia.pkg.PackageResolver"
        ]
    }
}