diff --git a/backend/app/modules/design/domain/value_objects.py b/backend/app/modules/design/domain/value_objects.py
index e69de29..fa826e5 100644
--- a/backend/app/modules/design/domain/value_objects.py
+++ b/backend/app/modules/design/domain/value_objects.py
@@ -0,0 +1,23 @@
+from enum import Enum
+
+
+class FileStatus(str, Enum):
+    OK = "ok"
+    SPARSE = "sparse"
+    MISSING = "missing"
+    TEMPLATE_RESIDUE = "template-residue"
+    PLACEHOLDER_HEAVY = "placeholder-heavy"
+
+
+class ArchitectureLayer(str, Enum):
+    BUSINESS = "business"
+    APPLICATION = "application"
+    DATA = "data"
+    TECHNOLOGY = "technology"
+
+
+class ModuleLayer(str, Enum):
+    DOMAIN = "domain"
+    APPLICATION = "application"
+    INFRASTRUCTURE = "infrastructure"
+    INTERFACES = "interfaces"
diff --git a/backend/tests/test_design_entities.py b/backend/tests/test_design_entities.py
new file mode 100644
index 0000000..139c405
--- /dev/null
+++ b/backend/tests/test_design_entities.py
@@ -0,0 +1,27 @@
+from app.modules.design.domain.value_objects import (
+    ArchitectureLayer,
+    FileStatus,
+    ModuleLayer,
+)
+
+
+def test_file_status_values():
+    assert FileStatus.OK == "ok"
+    assert FileStatus.SPARSE == "sparse"
+    assert FileStatus.MISSING == "missing"
+    assert FileStatus.TEMPLATE_RESIDUE == "template-residue"
+    assert FileStatus.PLACEHOLDER_HEAVY == "placeholder-heavy"
+
+
+def test_architecture_layer_values():
+    assert ArchitectureLayer.BUSINESS == "business"
+    assert ArchitectureLayer.APPLICATION == "application"
+    assert ArchitectureLayer.DATA == "data"
+    assert ArchitectureLayer.TECHNOLOGY == "technology"
+
+
+def test_module_layer_values():
+    assert ModuleLayer.DOMAIN == "domain"
+    assert ModuleLayer.APPLICATION == "application"
+    assert ModuleLayer.INFRASTRUCTURE == "infrastructure"
+    assert ModuleLayer.INTERFACES == "interfaces"