diff --git a/src/saturn_engine/utils/declarative_config.py b/src/saturn_engine/utils/declarative_config.py
index 5dafcf02..2577d028 100644
--- a/src/saturn_engine/utils/declarative_config.py
+++ b/src/saturn_engine/utils/declarative_config.py
@@ -13,7 +13,7 @@ class ObjectMetadata:
     labels: dict[str, str] = field(default_factory=dict)
 
 
-@dataclasses.dataclass
+@dataclasses.dataclass(kw_only=True)
 class BaseObject:
     metadata: ObjectMetadata
     apiVersion: str
diff --git a/src/saturn_engine/worker_manager/config/declarative.py b/src/saturn_engine/worker_manager/config/declarative.py
index abad9ece..fd0076c4 100644
--- a/src/saturn_engine/worker_manager/config/declarative.py
+++ b/src/saturn_engine/worker_manager/config/declarative.py
@@ -10,13 +10,21 @@
 from saturn_engine.utils.declarative_config import load_uncompiled_objects_from_str
 from saturn_engine.utils.options import fromdict
 
+from .declarative_dynamic_topology import DYNAMIC_TOPOLOGY_KIND
 from .declarative_dynamic_topology import DynamicTopology
+from .declarative_executor import EXECUTOR_KIND
 from .declarative_executor import Executor
+from .declarative_inventory import INVENTORY_KIND
 from .declarative_inventory import Inventory
+from .declarative_job import JOB_KIND
 from .declarative_job import Job
+from .declarative_job_definition import JOB_DEFINITION_KIND
 from .declarative_job_definition import JobDefinition
+from .declarative_resource import RESOURCE_KIND
+from .declarative_resource import RESOURCE_PROVIDER_KIND
 from .declarative_resource import Resource
 from .declarative_resource import ResourcesProvider
+from .declarative_topic_item import TOPIC_ITEM_KIND
 from .declarative_topic_item import TopicItem
 from .static_definitions import StaticDefinitions
 
@@ -37,28 +45,28 @@ def compile_static_definitions(
     definitions: StaticDefinitions = StaticDefinitions()
 
     for uncompiled_executor in objects_by_kind.pop(
-        "SaturnExecutor",
+        EXECUTOR_KIND,
         dict(),
     ).values():
         executor: Executor = fromdict(uncompiled_executor.data, Executor)
         definitions.add(executor)
 
     for uncompiled_inventory in objects_by_kind.pop(
-        "SaturnInventory",
+        INVENTORY_KIND,
         dict(),
     ).values():
         inventory: Inventory = fromdict(uncompiled_inventory.data, Inventory)
         definitions.add(inventory)
 
     for uncompiled_topic in objects_by_kind.pop(
-        "SaturnTopic",
+        TOPIC_ITEM_KIND,
         dict(),
     ).values():
         topic_item: TopicItem = fromdict(uncompiled_topic.data, TopicItem)
         definitions.add(topic_item)
 
     for uncompiled_job_definition in objects_by_kind.pop(
-        "SaturnJobDefinition",
+        JOB_DEFINITION_KIND,
         dict(),
     ).values():
         job_definition: JobDefinition = fromdict(
@@ -67,21 +75,21 @@ def compile_static_definitions(
         definitions.add(job_definition)
 
     for uncompiled_job in objects_by_kind.pop(
-        "SaturnJob",
+        JOB_KIND,
         dict(),
     ).values():
         job_data: Job = fromdict(uncompiled_job.data, Job)
         definitions.add(job_data)
 
     for uncompiled_resource in objects_by_kind.pop(
-        "SaturnResource",
+        RESOURCE_KIND,
         dict(),
     ).values():
         resource: Resource = fromdict(uncompiled_resource.data, Resource)
         definitions.add(resource)
 
     for uncompied_resources_provider in objects_by_kind.pop(
-        "SaturnResourcesProvider",
+        RESOURCE_PROVIDER_KIND,
         dict(),
     ).values():
         resources_provider = fromdict(
@@ -90,7 +98,7 @@ def compile_static_definitions(
         definitions.add(resources_provider)
 
     for uncompiled_dynamic_topology in objects_by_kind.pop(
-        "SaturnDynamicTopology",
+        DYNAMIC_TOPOLOGY_KIND,
         dict(),
     ).values():
         dynamic_topology: DynamicTopology = fromdict(
diff --git a/src/saturn_engine/worker_manager/config/declarative_dynamic_topology.py b/src/saturn_engine/worker_manager/config/declarative_dynamic_topology.py
index b76b90d5..877f05da 100644
--- a/src/saturn_engine/worker_manager/config/declarative_dynamic_topology.py
+++ b/src/saturn_engine/worker_manager/config/declarative_dynamic_topology.py
@@ -6,6 +6,8 @@
 from saturn_engine.utils.declarative_config import BaseObject
 from saturn_engine.worker_manager.config.static_definitions import StaticDefinitions
 
+DYNAMIC_TOPOLOGY_KIND: t.Final[str] = "SaturnDynamicTopology"
+
 
 class DynamicTopologyModule(t.Protocol):
     def __call__(self, definitions: StaticDefinitions) -> None: ...
@@ -16,9 +18,10 @@ class DynamicTopologySpec:
     module: str
 
 
-@dataclasses.dataclass
+@dataclasses.dataclass(kw_only=True)
 class DynamicTopology(BaseObject):
     spec: DynamicTopologySpec
+    kind: str = DYNAMIC_TOPOLOGY_KIND
 
     def update_static_definitions(self, definitions: StaticDefinitions) -> None:
         t.cast(
diff --git a/src/saturn_engine/worker_manager/config/declarative_executor.py b/src/saturn_engine/worker_manager/config/declarative_executor.py
index c048fc4c..03c2078f 100644
--- a/src/saturn_engine/worker_manager/config/declarative_executor.py
+++ b/src/saturn_engine/worker_manager/config/declarative_executor.py
@@ -1,4 +1,4 @@
-from typing import Any
+import typing as t
 
 import dataclasses
 from dataclasses import field
@@ -6,16 +6,19 @@
 from saturn_engine.core import api
 from saturn_engine.utils.declarative_config import BaseObject
 
+EXECUTOR_KIND: t.Final[str] = "SaturnExecutor"
+
 
 @dataclasses.dataclass
 class ExecutorSpec:
     type: str
-    options: dict[str, Any] = field(default_factory=dict)
+    options: dict[str, t.Any] = field(default_factory=dict)
 
 
-@dataclasses.dataclass
+@dataclasses.dataclass(kw_only=True)
 class Executor(BaseObject):
     spec: ExecutorSpec
+    kind: str = EXECUTOR_KIND
 
     def to_core_object(self) -> api.ComponentDefinition:
         return api.ComponentDefinition(
diff --git a/src/saturn_engine/worker_manager/config/declarative_inventory.py b/src/saturn_engine/worker_manager/config/declarative_inventory.py
index 4efae717..6d5d4e73 100644
--- a/src/saturn_engine/worker_manager/config/declarative_inventory.py
+++ b/src/saturn_engine/worker_manager/config/declarative_inventory.py
@@ -1,4 +1,4 @@
-from typing import Any
+import typing as t
 
 import dataclasses
 from dataclasses import field
@@ -6,16 +6,19 @@
 from saturn_engine.core import api
 from saturn_engine.utils.declarative_config import BaseObject
 
+INVENTORY_KIND: t.Final[str] = "SaturnInventory"
+
 
 @dataclasses.dataclass
 class InventorySpec:
     type: str
-    options: dict[str, Any] = field(default_factory=dict)
+    options: dict[str, t.Any] = field(default_factory=dict)
 
 
-@dataclasses.dataclass
+@dataclasses.dataclass(kw_only=True)
 class Inventory(BaseObject):
     spec: InventorySpec
+    kind: str = INVENTORY_KIND
 
     def to_core_object(self) -> api.ComponentDefinition:
         return api.ComponentDefinition(
diff --git a/src/saturn_engine/worker_manager/config/declarative_job.py b/src/saturn_engine/worker_manager/config/declarative_job.py
index d47db453..ec5b8ba6 100644
--- a/src/saturn_engine/worker_manager/config/declarative_job.py
+++ b/src/saturn_engine/worker_manager/config/declarative_job.py
@@ -10,6 +10,7 @@
 from saturn_engine.worker_manager.config.static_definitions import StaticDefinitions
 
 DEFAULT_INPUT_NAME: t.Final[str] = "default"
+JOB_KIND: t.Final[str] = "SaturnJob"
 
 
 @dataclasses.dataclass
@@ -101,9 +102,10 @@ def to_core_objects(
             )
 
 
-@dataclasses.dataclass
+@dataclasses.dataclass(kw_only=True)
 class Job(BaseObject):
     spec: JobSpec
+    kind: str = JOB_KIND
 
     def to_core_objects(
         self,
diff --git a/src/saturn_engine/worker_manager/config/declarative_job_definition.py b/src/saturn_engine/worker_manager/config/declarative_job_definition.py
index 138e8664..d1ffc3e8 100644
--- a/src/saturn_engine/worker_manager/config/declarative_job_definition.py
+++ b/src/saturn_engine/worker_manager/config/declarative_job_definition.py
@@ -8,6 +8,8 @@
 
 from .static_definitions import StaticDefinitions
 
+JOB_DEFINITION_KIND: t.Final[str] = "SaturnJobDefinition"
+
 
 @dataclasses.dataclass
 class JobDefinitionSpec:
@@ -15,9 +17,10 @@ class JobDefinitionSpec:
     minimalInterval: str
 
 
-@dataclasses.dataclass
+@dataclasses.dataclass(kw_only=True)
 class JobDefinition(BaseObject):
     spec: JobDefinitionSpec
+    kind: str = JOB_DEFINITION_KIND
 
     def to_core_objects(
         self,
diff --git a/src/saturn_engine/worker_manager/config/declarative_resource.py b/src/saturn_engine/worker_manager/config/declarative_resource.py
index be85ffe6..b1f88f0b 100644
--- a/src/saturn_engine/worker_manager/config/declarative_resource.py
+++ b/src/saturn_engine/worker_manager/config/declarative_resource.py
@@ -1,11 +1,13 @@
-from typing import Any
-from typing import Optional
+import typing as t
 
 import dataclasses
 
 from saturn_engine.core import api
 from saturn_engine.utils.declarative_config import BaseObject
 
+RESOURCE_KIND: t.Final[str] = "SaturnResource"
+RESOURCE_PROVIDER_KIND: t.Final[str] = "SaturnResourcesProvider"
+
 
 @dataclasses.dataclass
 class ResourceRateLimitSpec:
@@ -16,15 +18,16 @@ class ResourceRateLimitSpec:
 @dataclasses.dataclass
 class ResourceSpec:
     type: str
-    data: dict[str, Any]
+    data: dict[str, t.Any]
     default_delay: float = 0
-    rate_limit: Optional[ResourceRateLimitSpec] = None
+    rate_limit: t.Optional[ResourceRateLimitSpec] = None
     concurrency: int = 1
 
 
-@dataclasses.dataclass
+@dataclasses.dataclass(kw_only=True)
 class Resource(BaseObject):
     spec: ResourceSpec
+    kind: str = RESOURCE_KIND
 
     def to_core_object(self) -> api.ResourceItem:
         return api.ResourceItem(
@@ -47,12 +50,13 @@ def to_core_object(self) -> api.ResourceItem:
 class ResourcesProviderSpec:
     type: str
     resource_type: str
-    options: dict[str, Any]
+    options: dict[str, t.Any]
 
 
-@dataclasses.dataclass
+@dataclasses.dataclass(kw_only=True)
 class ResourcesProvider(BaseObject):
     spec: ResourcesProviderSpec
+    kind: str = RESOURCE_PROVIDER_KIND
 
     def to_core_object(self) -> api.ResourcesProviderItem:
         return api.ResourcesProviderItem(
diff --git a/src/saturn_engine/worker_manager/config/declarative_topic_item.py b/src/saturn_engine/worker_manager/config/declarative_topic_item.py
index abd30994..f37cfe7d 100644
--- a/src/saturn_engine/worker_manager/config/declarative_topic_item.py
+++ b/src/saturn_engine/worker_manager/config/declarative_topic_item.py
@@ -1,4 +1,4 @@
-from typing import Any
+import typing as t
 
 import dataclasses
 from dataclasses import field
@@ -6,16 +6,19 @@
 from saturn_engine.core import api
 from saturn_engine.utils.declarative_config import BaseObject
 
+TOPIC_ITEM_KIND: t.Final[str] = "SaturnTopic"
+
 
 @dataclasses.dataclass
 class TopicSpec:
     type: str
-    options: dict[str, Any] = field(default_factory=dict)
+    options: dict[str, t.Any] = field(default_factory=dict)
 
 
-@dataclasses.dataclass
+@dataclasses.dataclass(kw_only=True)
 class TopicItem(BaseObject):
     spec: TopicSpec
+    kind: str = TOPIC_ITEM_KIND
 
     def to_core_object(self) -> api.ComponentDefinition:
         return api.ComponentDefinition(