diff --git a/app/models/__init__.py b/app/models/__init__.py
new file mode 100644
index 0000000..dbb1b95
--- /dev/null
+++ b/app/models/__init__.py
@@ -0,0 +1,24 @@
+"""
+app/models/__init__.py — Package-Init für mindnet DTOs (WP-04)
+Version: 0.1.0 • Stand: 2025-10-07
+"""
+
+from .dto import (
+    EdgeKind,
+    NodeDTO,
+    EdgeDTO,
+    QueryRequest,
+    QueryHit,
+    QueryResponse,
+    GraphResponse,
+)
+
+__all__ = [
+    "EdgeKind",
+    "NodeDTO",
+    "EdgeDTO",
+    "QueryRequest",
+    "QueryHit",
+    "QueryResponse",
+    "GraphResponse",
+]