diff --git a/schema/druncschema/controller.proto b/schema/druncschema/controller.proto
index 1431fde..5ce10aa 100644
--- a/schema/druncschema/controller.proto
+++ b/schema/druncschema/controller.proto
@@ -13,7 +13,7 @@ service Controller {
 
   rpc describe_fsm               (AddressedCommand) returns (DescribeFSMResponse) {}
   rpc execute_fsm_command        (ExecuteFSMCommandRequest) returns (ExecuteFSMCommandResponse) {}
-  rpc execute_expert_command     (Request) returns (Response) {}
+  rpc execute_expert_command     (ExecuteExpertCommandRequest) returns (ExecuteExpertCommandResponse) {}
   rpc include                    (Request) returns (Response) {}
   rpc exclude                    (Request) returns (Response) {}
   rpc recompute_status           (AddressedCommand) returns (RecomputeStatusResponse) {}
@@ -34,6 +34,23 @@ message AddressedCommand {
   bool execute_on_all_subsequent_children_in_path = 6;
 }
 
+message ExecuteExpertCommandRequest {
+  Token token = 1;
+  string json_string = 2;
+  string target = 3;
+  bool execute_along_path = 4;
+  bool execute_on_all_subsequent_children_in_path = 5;
+}
+
+message ExecuteExpertCommandResponse {
+  Token token = 1;
+  string name = 2;
+  string data = 4;
+  repeated ExecuteExpertCommandResponse children = 5;
+  FSMResponseFlag fsm_flag = 6;
+  ResponseFlag flag = 7;
+}
+
 message ExecuteFSMCommandRequest {
   Token token = 1;
   FSMCommand command = 2;
diff --git a/src/druncschema/controller_pb2.py b/src/druncschema/controller_pb2.py
index 46ad8b3..f75c865 100644
--- a/src/druncschema/controller_pb2.py
+++ b/src/druncschema/controller_pb2.py
@@ -28,7 +28,7 @@
 from google.protobuf import any_pb2 as google_dot_protobuf_dot_any__pb2
 
 
-DESCRIPTOR = _descriptor_pool.Default().AddSerializedFile(b'\n\x1c\x64runcschema/controller.proto\x12\x1e\x64unedaq.druncschema.controller\x1a\"druncschema/request_response.proto\x1a\x1d\x64runcschema/description.proto\x1a\x17\x64runcschema/token.proto\x1a\x19google/protobuf/any.proto\"\xf5\x01\n\x10\x41\x64\x64ressedCommand\x12)\n\x05token\x18\x01 \x01(\x0b\x32\x1a.dunedaq.druncschema.Token\x12\x14\n\x0c\x63ommand_name\x18\x02 \x01(\t\x12/\n\x0c\x63ommand_data\x18\x03 \x01(\x0b\x32\x14.google.protobuf.AnyH\x00\x88\x01\x01\x12\x0e\n\x06target\x18\x04 \x01(\t\x12\x1a\n\x12\x65xecute_along_path\x18\x05 \x01(\x08\x12\x32\n*execute_on_all_subsequent_children_in_path\x18\x06 \x01(\x08\x42\x0f\n\r_command_data\"\xe2\x01\n\x18\x45xecuteFSMCommandRequest\x12)\n\x05token\x18\x01 \x01(\x0b\x32\x1a.dunedaq.druncschema.Token\x12;\n\x07\x63ommand\x18\x02 \x01(\x0b\x32*.dunedaq.druncschema.controller.FSMCommand\x12\x0e\n\x06target\x18\x03 \x01(\t\x12\x1a\n\x12\x65xecute_along_path\x18\x04 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\x01(\x0e\x32!.dunedaq.druncschema.ResponseFlag\"\xfd\x01\n\x17RecomputeStatusResponse\x12)\n\x05token\x18\x01 \x01(\x0b\x32\x1a.dunedaq.druncschema.Token\x12\x0c\n\x04name\x18\x02 \x01(\t\x12\x36\n\x06status\x18\x03 \x01(\x0b\x32&.dunedaq.druncschema.controller.Status\x12@\n\x08\x63hildren\x18\x04 \x03(\x0b\x32..dunedaq.druncschema.controller.StatusResponse\x12/\n\x04\x66lag\x18\x05 \x01(\x0e\x32!.dunedaq.druncschema.ResponseFlag\"\xee\x02\n\x08\x41rgument\x12\x0c\n\x04name\x18\x01 \x01(\t\x12\x43\n\x08presence\x18\x02 \x01(\x0e\x32\x31.dunedaq.druncschema.controller.Argument.Presence\x12;\n\x04type\x18\x03 \x01(\x0e\x32-.dunedaq.druncschema.controller.Argument.Type\x12\x30\n\rdefault_value\x18\x04 \x01(\x0b\x32\x14.google.protobuf.AnyH\x00\x88\x01\x01\x12%\n\x07\x63hoices\x18\x05 \x03(\x0b\x32\x14.google.protobuf.Any\x12\x0c\n\x04help\x18\x06 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\x03(\x0b\x32+.dunedaq.druncschema.controller.FSMSequenceB\n\n\x08_session\"\x9b\x01\n\x06Status\x12\r\n\x05state\x18\x02 \x01(\t\x12\x11\n\tsub_state\x18\x03 \x01(\t\x12\x10\n\x08in_error\x18\x04 \x01(\x08\x12\x10\n\x08included\x18\x05 \x01(\x08\x12>\n\x08run_info\x18\x06 \x01(\x0b\x32\'.dunedaq.druncschema.controller.RunInfoH\x00\x88\x01\x01\x42\x0b\n\t_run_info\"\xce\x01\n\x07RunInfo\x12\x10\n\x08run_type\x18\x01 \x01(\t\x12\x14\n\x0ctrigger_rate\x18\x02 \x01(\x01\x12\x12\n\nrun_number\x18\x03 \x01(\x04\x12\x1c\n\x14\x64isable_data_storage\x18\x04 \x01(\x08\x12\x19\n\x11run_time_at_start\x18\x05 \x01(\r\x12\x1c\n\x14run_time_since_start\x18\x06 \x01(\r\x12\x17\n\x0frun_config_file\x18\x07 \x01(\t\x12\x17\n\x0frun_config_name\x18\x08 \x01(\t*\x9a\x01\n\x0f\x46SMResponseFlag\x12\x1d\n\x19\x46SM_EXECUTED_SUCCESSFULLY\x10\x00\x12\x0e\n\nFSM_FAILED\x10\x01\x12\x1a\n\x16\x46SM_INVALID_TRANSITION\x10\x02\x12\x1d\n\x19\x46SM_NOT_EXECUTED_EXCLUDED\x10\x03\x12\x1d\n\x19\x46SM_NOT_EXECUTED_IN_ERROR\x10\x04\x32\xe2\t\n\nController\x12p\n\x08\x64\x65scribe\x12\x30.dunedaq.druncschema.controller.AddressedCommand\x1a\x30.dunedaq.druncschema.controller.DescribeResponse\"\x00\x12l\n\x06status\x12\x30.dunedaq.druncschema.controller.AddressedCommand\x1a..dunedaq.druncschema.controller.StatusResponse\"\x00\x12w\n\x0c\x64\x65scribe_fsm\x12\x30.dunedaq.druncschema.controller.AddressedCommand\x1a\x33.dunedaq.druncschema.controller.DescribeFSMResponse\"\x00\x12\x8c\x01\n\x13\x65xecute_fsm_command\x12\x38.dunedaq.druncschema.controller.ExecuteFSMCommandRequest\x1a\x39.dunedaq.druncschema.controller.ExecuteFSMCommandResponse\"\x00\x12\x95\x01\n\x16\x65xecute_expert_command\x12;.dunedaq.druncschema.controller.ExecuteExpertCommandRequest\x1a<.dunedaq.druncschema.controller.ExecuteExpertCommandResponse\"\x00\x12H\n\x07include\x12\x1c.dunedaq.druncschema.Request\x1a\x1d.dunedaq.druncschema.Response\"\x00\x12H\n\x07\x65xclude\x12\x1c.dunedaq.druncschema.Request\x1a\x1d.dunedaq.druncschema.Response\"\x00\x12\x7f\n\x10recompute_status\x12\x30.dunedaq.druncschema.controller.AddressedCommand\x1a\x37.dunedaq.druncschema.controller.RecomputeStatusResponse\"\x00\x12M\n\x0ctake_control\x12\x1c.dunedaq.druncschema.Request\x1a\x1d.dunedaq.druncschema.Response\"\x00\x12R\n\x11surrender_control\x12\x1c.dunedaq.druncschema.Request\x1a\x1d.dunedaq.druncschema.Response\"\x00\x12Q\n\x10who_is_in_charge\x12\x1c.dunedaq.druncschema.Request\x1a\x1d.dunedaq.druncschema.Response\"\x00\x12I\n\x08to_error\x12\x1c.dunedaq.druncschema.Request\x1a\x1d.dunedaq.druncschema.Response\"\x00\x62\x06proto3')
 
 _globals = globals()
 _builder.BuildMessageAndEnumDescriptors(DESCRIPTOR, _globals)
@@ -37,42 +37,46 @@
   DESCRIPTOR._loaded_options = None
   _globals['_FSMCOMMAND_ARGUMENTSENTRY']._loaded_options = None
   _globals['_FSMCOMMAND_ARGUMENTSENTRY']._serialized_options = b'8\001'
-  _globals['_FSMRESPONSEFLAG']._serialized_start=3431
-  _globals['_FSMRESPONSEFLAG']._serialized_end=3585
+  _globals['_FSMRESPONSEFLAG']._serialized_start=3923
+  _globals['_FSMRESPONSEFLAG']._serialized_end=4077
   _globals['_ADDRESSEDCOMMAND']._serialized_start=184
   _globals['_ADDRESSEDCOMMAND']._serialized_end=429
-  _globals['_EXECUTEFSMCOMMANDREQUEST']._serialized_start=432
-  _globals['_EXECUTEFSMCOMMANDREQUEST']._serialized_end=658
-  _globals['_EXECUTEFSMCOMMANDRESPONSE']._serialized_start=661
-  _globals['_EXECUTEFSMCOMMANDRESPONSE']._serialized_end=974
-  _globals['_FSMCOMMAND']._serialized_start=977
-  _globals['_FSMCOMMAND']._serialized_end=1189
-  _globals['_FSMCOMMAND_ARGUMENTSENTRY']._serialized_start=1110
-  _globals['_FSMCOMMAND_ARGUMENTSENTRY']._serialized_end=1180
-  _globals['_STATUSRESPONSE']._serialized_start=1192
-  _globals['_STATUSRESPONSE']._serialized_end=1436
-  _globals['_DESCRIBERESPONSE']._serialized_start=1439
-  _globals['_DESCRIBERESPONSE']._serialized_end=1686
-  _globals['_DESCRIBEFSMRESPONSE']._serialized_start=1689
-  _globals['_DESCRIBEFSMRESPONSE']._serialized_end=1964
-  _globals['_RECOMPUTESTATUSRESPONSE']._serialized_start=1967
-  _globals['_RECOMPUTESTATUSRESPONSE']._serialized_end=2220
-  _globals['_ARGUMENT']._serialized_start=2223
-  _globals['_ARGUMENT']._serialized_end=2589
-  _globals['_ARGUMENT_PRESENCE']._serialized_start=2482
-  _globals['_ARGUMENT_PRESENCE']._serialized_end=2521
-  _globals['_ARGUMENT_TYPE']._serialized_start=2523
-  _globals['_ARGUMENT_TYPE']._serialized_end=2571
-  _globals['_FSMCOMMANDDESCRIPTION']._serialized_start=2592
-  _globals['_FSMCOMMANDDESCRIPTION']._serialized_end=2744
-  _globals['_FSMSEQUENCE']._serialized_start=2746
-  _globals['_FSMSEQUENCE']._serialized_end=2792
-  _globals['_FSMCOMMANDSDESCRIPTION']._serialized_start=2795
-  _globals['_FSMCOMMANDSDESCRIPTION']._serialized_end=3061
-  _globals['_STATUS']._serialized_start=3064
-  _globals['_STATUS']._serialized_end=3219
-  _globals['_RUNINFO']._serialized_start=3222
-  _globals['_RUNINFO']._serialized_end=3428
-  _globals['_CONTROLLER']._serialized_start=3588
-  _globals['_CONTROLLER']._serialized_end=4775
+  _globals['_EXECUTEEXPERTCOMMANDREQUEST']._serialized_start=432
+  _globals['_EXECUTEEXPERTCOMMANDREQUEST']._serialized_end=621
+  _globals['_EXECUTEEXPERTCOMMANDRESPONSE']._serialized_start=624
+  _globals['_EXECUTEEXPERTCOMMANDRESPONSE']._serialized_end=921
+  _globals['_EXECUTEFSMCOMMANDREQUEST']._serialized_start=924
+  _globals['_EXECUTEFSMCOMMANDREQUEST']._serialized_end=1150
+  _globals['_EXECUTEFSMCOMMANDRESPONSE']._serialized_start=1153
+  _globals['_EXECUTEFSMCOMMANDRESPONSE']._serialized_end=1466
+  _globals['_FSMCOMMAND']._serialized_start=1469
+  _globals['_FSMCOMMAND']._serialized_end=1681
+  _globals['_FSMCOMMAND_ARGUMENTSENTRY']._serialized_start=1602
+  _globals['_FSMCOMMAND_ARGUMENTSENTRY']._serialized_end=1672
+  _globals['_STATUSRESPONSE']._serialized_start=1684
+  _globals['_STATUSRESPONSE']._serialized_end=1928
+  _globals['_DESCRIBERESPONSE']._serialized_start=1931
+  _globals['_DESCRIBERESPONSE']._serialized_end=2178
+  _globals['_DESCRIBEFSMRESPONSE']._serialized_start=2181
+  _globals['_DESCRIBEFSMRESPONSE']._serialized_end=2456
+  _globals['_RECOMPUTESTATUSRESPONSE']._serialized_start=2459
+  _globals['_RECOMPUTESTATUSRESPONSE']._serialized_end=2712
+  _globals['_ARGUMENT']._serialized_start=2715
+  _globals['_ARGUMENT']._serialized_end=3081
+  _globals['_ARGUMENT_PRESENCE']._serialized_start=2974
+  _globals['_ARGUMENT_PRESENCE']._serialized_end=3013
+  _globals['_ARGUMENT_TYPE']._serialized_start=3015
+  _globals['_ARGUMENT_TYPE']._serialized_end=3063
+  _globals['_FSMCOMMANDDESCRIPTION']._serialized_start=3084
+  _globals['_FSMCOMMANDDESCRIPTION']._serialized_end=3236
+  _globals['_FSMSEQUENCE']._serialized_start=3238
+  _globals['_FSMSEQUENCE']._serialized_end=3284
+  _globals['_FSMCOMMANDSDESCRIPTION']._serialized_start=3287
+  _globals['_FSMCOMMANDSDESCRIPTION']._serialized_end=3553
+  _globals['_STATUS']._serialized_start=3556
+  _globals['_STATUS']._serialized_end=3711
+  _globals['_RUNINFO']._serialized_start=3714
+  _globals['_RUNINFO']._serialized_end=3920
+  _globals['_CONTROLLER']._serialized_start=4080
+  _globals['_CONTROLLER']._serialized_end=5330
 # @@protoc_insertion_point(module_scope)
diff --git a/src/druncschema/controller_pb2.pyi b/src/druncschema/controller_pb2.pyi
index af5ee94..560a0af 100644
--- a/src/druncschema/controller_pb2.pyi
+++ b/src/druncschema/controller_pb2.pyi
@@ -78,6 +78,68 @@ class AddressedCommand(google.protobuf.message.Message):
 
 global___AddressedCommand = AddressedCommand
 
+@typing.final
+class ExecuteExpertCommandRequest(google.protobuf.message.Message):
+    DESCRIPTOR: google.protobuf.descriptor.Descriptor
+
+    TOKEN_FIELD_NUMBER: builtins.int
+    JSON_STRING_FIELD_NUMBER: builtins.int
+    TARGET_FIELD_NUMBER: builtins.int
+    EXECUTE_ALONG_PATH_FIELD_NUMBER: builtins.int
+    EXECUTE_ON_ALL_SUBSEQUENT_CHILDREN_IN_PATH_FIELD_NUMBER: builtins.int
+    json_string: builtins.str
+    target: builtins.str
+    execute_along_path: builtins.bool
+    execute_on_all_subsequent_children_in_path: builtins.bool
+    @property
+    def token(self) -> druncschema.token_pb2.Token: ...
+    def __init__(
+        self,
+        *,
+        token: druncschema.token_pb2.Token | None = ...,
+        json_string: builtins.str = ...,
+        target: builtins.str = ...,
+        execute_along_path: builtins.bool = ...,
+        execute_on_all_subsequent_children_in_path: builtins.bool = ...,
+    ) -> None: ...
+    def HasField(self, field_name: typing.Literal["token", b"token"]) -> builtins.bool: ...
+    def ClearField(self, field_name: typing.Literal["execute_along_path", b"execute_along_path", "execute_on_all_subsequent_children_in_path", b"execute_on_all_subsequent_children_in_path", "json_string", b"json_string", "target", b"target", "token", b"token"]) -> None: ...
+
+global___ExecuteExpertCommandRequest = ExecuteExpertCommandRequest
+
+@typing.final
+class ExecuteExpertCommandResponse(google.protobuf.message.Message):
+    DESCRIPTOR: google.protobuf.descriptor.Descriptor
+
+    TOKEN_FIELD_NUMBER: builtins.int
+    NAME_FIELD_NUMBER: builtins.int
+    DATA_FIELD_NUMBER: builtins.int
+    CHILDREN_FIELD_NUMBER: builtins.int
+    FSM_FLAG_FIELD_NUMBER: builtins.int
+    FLAG_FIELD_NUMBER: builtins.int
+    name: builtins.str
+    data: builtins.str
+    fsm_flag: global___FSMResponseFlag.ValueType
+    flag: druncschema.request_response_pb2.ResponseFlag.ValueType
+    @property
+    def token(self) -> druncschema.token_pb2.Token: ...
+    @property
+    def children(self) -> google.protobuf.internal.containers.RepeatedCompositeFieldContainer[global___ExecuteExpertCommandResponse]: ...
+    def __init__(
+        self,
+        *,
+        token: druncschema.token_pb2.Token | None = ...,
+        name: builtins.str = ...,
+        data: builtins.str = ...,
+        children: collections.abc.Iterable[global___ExecuteExpertCommandResponse] | None = ...,
+        fsm_flag: global___FSMResponseFlag.ValueType = ...,
+        flag: druncschema.request_response_pb2.ResponseFlag.ValueType = ...,
+    ) -> None: ...
+    def HasField(self, field_name: typing.Literal["token", b"token"]) -> builtins.bool: ...
+    def ClearField(self, field_name: typing.Literal["children", b"children", "data", b"data", "flag", b"flag", "fsm_flag", b"fsm_flag", "name", b"name", "token", b"token"]) -> None: ...
+
+global___ExecuteExpertCommandResponse = ExecuteExpertCommandResponse
+
 @typing.final
 class ExecuteFSMCommandRequest(google.protobuf.message.Message):
     DESCRIPTOR: google.protobuf.descriptor.Descriptor
diff --git a/src/druncschema/controller_pb2_grpc.py b/src/druncschema/controller_pb2_grpc.py
index f6f9ca5..45c206a 100644
--- a/src/druncschema/controller_pb2_grpc.py
+++ b/src/druncschema/controller_pb2_grpc.py
@@ -57,8 +57,8 @@ def __init__(self, channel):
                 _registered_method=True)
         self.execute_expert_command = channel.unary_unary(
                 '/dunedaq.druncschema.controller.Controller/execute_expert_command',
-                request_serializer=druncschema_dot_request__response__pb2.Request.SerializeToString,
-                response_deserializer=druncschema_dot_request__response__pb2.Response.FromString,
+                request_serializer=druncschema_dot_controller__pb2.ExecuteExpertCommandRequest.SerializeToString,
+                response_deserializer=druncschema_dot_controller__pb2.ExecuteExpertCommandResponse.FromString,
                 _registered_method=True)
         self.include = channel.unary_unary(
                 '/dunedaq.druncschema.controller.Controller/include',
@@ -197,8 +197,8 @@ def add_ControllerServicer_to_server(servicer, server):
             ),
             'execute_expert_command': grpc.unary_unary_rpc_method_handler(
                     servicer.execute_expert_command,
-                    request_deserializer=druncschema_dot_request__response__pb2.Request.FromString,
-                    response_serializer=druncschema_dot_request__response__pb2.Response.SerializeToString,
+                    request_deserializer=druncschema_dot_controller__pb2.ExecuteExpertCommandRequest.FromString,
+                    response_serializer=druncschema_dot_controller__pb2.ExecuteExpertCommandResponse.SerializeToString,
             ),
             'include': grpc.unary_unary_rpc_method_handler(
                     servicer.include,
@@ -369,8 +369,8 @@ def execute_expert_command(request,
             request,
             target,
             '/dunedaq.druncschema.controller.Controller/execute_expert_command',
-            druncschema_dot_request__response__pb2.Request.SerializeToString,
-            druncschema_dot_request__response__pb2.Response.FromString,
+            druncschema_dot_controller__pb2.ExecuteExpertCommandRequest.SerializeToString,
+            druncschema_dot_controller__pb2.ExecuteExpertCommandResponse.FromString,
             options,
             channel_credentials,
             insecure,