diff --git a/core/services/directory_service.py b/core/services/directory_service.py
index 0bf7eb1..cd4eeb6 100644
--- a/core/services/directory_service.py
+++ b/core/services/directory_service.py
@@ -9,34 +9,34 @@ class DirectoryService:
     """Coordinate configured model directory and subfolder discovery."""
 
     def __init__(self, context: RouteContext):
-        self.template_key_aliases = context.get("TEMPLATE_KEY_ALIASES")
-        self.dedupe_local_base_directories = context.get(
+        self.template_key_aliases = context.require("TEMPLATE_KEY_ALIASES")
+        self.dedupe_local_base_directories = context.require(
             "dedupe_local_base_directories"
         )
-        self.get_category_folder_keys = context.get("get_category_folder_keys")
-        self.get_comfy_root_path = context.get("get_comfy_root_path")
-        self.get_default_root_for_category = context.get(
+        self.get_category_folder_keys = context.require("get_category_folder_keys")
+        self.get_comfy_root_path = context.require("get_comfy_root_path")
+        self.get_default_root_for_category = context.require(
             "get_default_root_for_category"
         )
-        self.get_download_directory = context.get("get_download_directory")
-        self.get_enabled_download_categories = context.get(
+        self.get_download_directory = context.require("get_download_directory")
+        self.get_enabled_download_categories = context.require(
             "get_enabled_download_categories"
         )
-        self.get_local_path_identity = context.get("get_local_path_identity")
-        self.is_civarchive_available = context.get("is_civarchive_available")
-        self.is_lora_manager_archive_available = context.get(
+        self.get_local_path_identity = context.require("get_local_path_identity")
+        self.is_civarchive_available = context.require("is_civarchive_available")
+        self.is_lora_manager_archive_available = context.require(
             "is_lora_manager_archive_available"
         )
-        self.load_resolver_settings = context.get("load_resolver_settings")
-        self.normalize_download_category = context.get(
+        self.load_resolver_settings = context.require("load_resolver_settings")
+        self.normalize_download_category = context.require(
             "normalize_download_category"
         )
-        self.prefer_local_base_directory = context.get(
+        self.prefer_local_base_directory = context.require(
             "prefer_local_base_directory"
         )
-        self.extension = context.get("self")
-        self.split_path_segments = context.get("split_path_segments")
-        self.web = context.get("web")
+        self.extension = context.require("self")
+        self.split_path_segments = context.require("split_path_segments")
+        self.web = context.require("web")
 
     async def get_directories(self, request):
         """Get available model directories."""
diff --git a/tests/test_route_context_contract.py b/tests/test_route_context_contract.py
index 4e0249c..7e8a2ef 100644
--- a/tests/test_route_context_contract.py
+++ b/tests/test_route_context_contract.py
@@ -1,6 +1,7 @@
 import pytest
 
 from core.routes.context import RouteContext
+from core.services.directory_service import DirectoryService
 from core.services.scanner_service import ScannerService
 
 
@@ -17,3 +18,11 @@ def test_route_context_remains_immutable_after_construction():
 def test_scanner_service_requires_mandatory_route_dependencies():
     with pytest.raises(KeyError, match="Missing route dependency: asyncio"):
         ScannerService(RouteContext({}))
+
+
+def test_directory_service_requires_mandatory_route_dependencies():
+    with pytest.raises(
+        KeyError,
+        match="Missing route dependency: TEMPLATE_KEY_ALIASES",
+    ):
+        DirectoryService(RouteContext({}))