diff --git a/cli.py b/cli.py
new file mode 100644
index 0000000..19a3eff
--- /dev/null
+++ b/cli.py
@@ -0,0 +1,51 @@
+"""CLI for the RAG agent.
+
+Commands:
+  /add <text>     — add text to the knowledge base
+  /search <query> — search the knowledge base
+  /quit           — exit the program
+
+Any other input is forwarded to the agent as a normal question.
+"""
+from agent import run_agent, search_knowledge_base, add_to_knowledge_base
+
+
+def main() -> None:
+    print("RAG Agent CLI. Commands: /add <text>, /search <query>, /quit")
+    while True:
+        try:
+            user_input = input("You: ").strip()
+        except (EOFError, KeyboardInterrupt):
+            print("\nExiting.")
+            break
+
+        if not user_input:
+            continue
+
+        if user_input == "/quit":
+            print("Goodbye!")
+            break
+
+        elif user_input.startswith("/add "):
+            text = user_input[5:].strip()
+            if not text:
+                print("Usage: /add <text>")
+                continue
+            result = add_to_knowledge_base.invoke({"text": text})
+            print(result)
+
+        elif user_input.startswith("/search "):
+            query = user_input[8:].strip()
+            if not query:
+                print("Usage: /search <query>")
+                continue
+            result = search_knowledge_base.invoke({"query": query})
+            print(result)
+
+        else:
+            response = run_agent(user_input)
+            print(f"Agent: {response}")
+
+
+if __name__ == "__main__":
+    main()