diff --git a/backend/app/modules/graph/interfaces/http/router.py b/backend/app/modules/graph/interfaces/http/router.py
index 400e8bb..e6dd1de 100644
--- a/backend/app/modules/graph/interfaces/http/router.py
+++ b/backend/app/modules/graph/interfaces/http/router.py
@@ -40,17 +40,17 @@ def _get_or_trigger_scan(project_id: str):
 @router.get("")
 def get_graph(project_id: str):
     """Build and return the full panorama graph for a project."""
-    _project_service.get_project(project_id)  # Ensure project exists (raises 404)
+    project = _project_service.get_project(project_id)  # Ensure project exists (raises 404)
     scan_result = _get_or_trigger_scan(project_id)
-    view = _graph_service.build_panorama(scan_result)
+    view = _graph_service.build_panorama(scan_result, design_dir=project.design_dir)
     return asdict(view)
 
 
 @router.get("/nodes/{node_id}/neighbors")
 def get_neighbors(project_id: str, node_id: str):
     """Return the subgraph of neighbors for a given node."""
-    _project_service.get_project(project_id)  # Ensure project exists (raises 404)
+    project = _project_service.get_project(project_id)  # Ensure project exists (raises 404)
     scan_result = _get_or_trigger_scan(project_id)
-    view = _graph_service.build_panorama(scan_result)
+    view = _graph_service.build_panorama(scan_result, design_dir=project.design_dir)
     neighbors = _graph_service.get_neighbors(view, node_id)
     return asdict(neighbors)
diff --git a/backend/tests/test_graph_service.py b/backend/tests/test_graph_service.py
index f84c5ac..647eb2b 100644
--- a/backend/tests/test_graph_service.py
+++ b/backend/tests/test_graph_service.py
@@ -27,8 +27,8 @@ def graph_service():
     return GraphService()
 
 
-def test_panorama_has_groups(graph_service, scan_result):
-    view = graph_service.build_panorama(scan_result)
+def test_panorama_has_groups(graph_service, scan_result, design_dir):
+    view = graph_service.build_panorama(scan_result, design_dir=design_dir)
     group_ids = {g.id for g in view.groups}
     assert "business" in group_ids
     assert "application" in group_ids
@@ -37,42 +37,42 @@ def test_panorama_has_groups(graph_service, scan_result):
     assert "cross-layer" in group_ids
 
 
-def test_panorama_has_capability_nodes(graph_service, scan_result):
-    view = graph_service.build_panorama(scan_result)
+def test_panorama_has_capability_nodes(graph_service, scan_result, design_dir):
+    view = graph_service.build_panorama(scan_result, design_dir=design_dir)
     cap_nodes = [n for n in view.nodes if n.type == "capability"]
     assert len(cap_nodes) > 0
     assert all(n.group_id == "business" for n in cap_nodes)
 
 
-def test_panorama_has_module_nodes(graph_service, scan_result):
-    view = graph_service.build_panorama(scan_result)
+def test_panorama_has_module_nodes(graph_service, scan_result, design_dir):
+    view = graph_service.build_panorama(scan_result, design_dir=design_dir)
     mod_nodes = [n for n in view.nodes if n.type == "module"]
     assert len(mod_nodes) > 0
     assert all(n.group_id == "application" for n in mod_nodes)
 
 
-def test_panorama_has_entity_nodes(graph_service, scan_result):
-    view = graph_service.build_panorama(scan_result)
+def test_panorama_has_entity_nodes(graph_service, scan_result, design_dir):
+    view = graph_service.build_panorama(scan_result, design_dir=design_dir)
     ent_nodes = [n for n in view.nodes if n.type == "entity"]
     assert len(ent_nodes) > 0
     assert all(n.group_id == "data" for n in ent_nodes)
 
 
-def test_panorama_has_edges(graph_service, scan_result):
-    view = graph_service.build_panorama(scan_result)
+def test_panorama_has_edges(graph_service, scan_result, design_dir):
+    view = graph_service.build_panorama(scan_result, design_dir=design_dir)
     assert len(view.edges) > 0
     relations = {e.relation for e in view.edges}
     assert "traces_to" in relations
 
 
-def test_panorama_depends_on_edges(graph_service, scan_result):
-    view = graph_service.build_panorama(scan_result)
+def test_panorama_depends_on_edges(graph_service, scan_result, design_dir):
+    view = graph_service.build_panorama(scan_result, design_dir=design_dir)
     dep_edges = [e for e in view.edges if e.relation == "depends_on"]
     assert len(dep_edges) > 0
 
 
-def test_neighbors_returns_subgraph(graph_service, scan_result):
-    view = graph_service.build_panorama(scan_result)
+def test_neighbors_returns_subgraph(graph_service, scan_result, design_dir):
+    view = graph_service.build_panorama(scan_result, design_dir=design_dir)
     # Use a known capability node
     neighbors = graph_service.get_neighbors(view, "CAP-PROJ-REG")
     assert len(neighbors.nodes) > 0
@@ -80,15 +80,15 @@ def test_neighbors_returns_subgraph(graph_service, scan_result):
     assert len(neighbors.edges) > 0
 
 
-def test_neighbors_unknown_node(graph_service, scan_result):
-    view = graph_service.build_panorama(scan_result)
+def test_neighbors_unknown_node(graph_service, scan_result, design_dir):
+    view = graph_service.build_panorama(scan_result, design_dir=design_dir)
     neighbors = graph_service.get_neighbors(view, "NONEXISTENT")
     assert len(neighbors.nodes) == 0
     assert len(neighbors.edges) == 0
 
 
-def test_graph_node_has_parent_field(graph_service, scan_result):
-    view = graph_service.build_panorama(scan_result)
+def test_graph_node_has_parent_field(graph_service, scan_result, design_dir):
+    view = graph_service.build_panorama(scan_result, design_dir=design_dir)
     for node in view.nodes:
         assert hasattr(node, 'parent')