diff --git a/main.py b/main.py
new file mode 100644
index 0000000..cd512db
--- /dev/null
+++ b/main.py
@@ -0,0 +1,17 @@
+import sys
+from agent import graph
+
+if __name__ == "__main__":
+    print("LangGraph stream‑mode demo. Type 'exit' to quit.")
+    state = {"messages": []}
+    for line in sys.stdin:
+        user_input = line.rstrip('\n')
+        if not user_input:
+            continue
+        if user_input.lower() in {"exit", "quit"}:
+            break
+        for partial in graph.stream({"input": user_input, "messages": state["messages"]}):
+            print(partial.get("partial", ""), end="")
+        print()
+        state["messages"] = graph.invoke({"input": user_input, "messages": state["messages"]})["messages"]
+    print("Goodbye!")