Add src/cli.py

src/cli.py

@@ -0,0 +1,45 @@
+"""Command‑line interface for the FAQ‑bot.
+
+Examples:
+    python cli.py --question "What topics are covered in week 3?"
+    python cli.py --question "What is the course schedule?"
+
+If no question is supplied, an interactive prompt is started.
+"""
+
+import argparse
+import asyncio
+
+from .agent import create_agent_executor
+
+async def main():
+    parser = argparse.ArgumentParser(description="FAQ‑bot CLI")
+    parser.add_argument("--question", type=str, help="Question to ask the bot")
+    args = parser.parse_args()
+
+    executor = await create_agent_executor()
+
+    if args.question:
+        state = {"input": args.question}
+        result = await executor.ainvoke(state)
+        print("\nAnswer:")
+        print(result["answer"])
+        print(f"\nSource: {result['source']}")
+    else:
+        print("Enter a question (Ctrl‑D to exit):")
+        while True:
+            try:
+                q = input("> ")
+            except EOFError:
+                break
+            if not q.strip():
+                continue
+            state = {"input": q}
+            result = await executor.ainvoke(state)
+            print("\nAnswer:")
+            print(result["answer"])
+            print(f"\nSource: {result['source']}")
+            print("\n---")
+
+if __name__ == "__main__":
+    asyncio.run(main())