update cmd hitl

cookbook/pocketflow-cmd-hitl/utils/call_llm.py

@@ -0,0 +1,17 @@
+import os
+from openai import OpenAI
+
+def call_llm(prompt: str) -> str:
+    client = OpenAI(api_key=os.environ.get("OPENAI_API_KEY", "your-api-key"))
+    r = client.chat.completions.create(
+        model="gpt-4o", 
+        messages=[{"role": "user", "content": prompt}]
+    )
+    return r.choices[0].message.content
+
+if __name__ == "__main__":
+    print("Testing real LLM call:")
+    joke_prompt = "Tell me a short joke about a programmer."
+    print(f"Prompt: {joke_prompt}")
+    response = call_llm(joke_prompt)
+    print(f"Response: {response}")