Create core/llm.py

src/core/llm.py

@@ -0,0 +1,15 @@
+from langchain_openai import ChatOpenAI
+from config.config import Config
+
+def load_llm():
+    if not Config.OPENROUTER_API_KEY:
+        raise ValueError("OPENROUTER_API_KEY is not set")
+
+    try:
+        return ChatOpenAI(
+            model=Config.LLM_MODEL,
+            base_url=Config.OPENROUTER_BASE_URL,
+            api_key=Config.OPENROUTER_API_KEY
+        )
+    except Exception as e:
+        raise RuntimeError(f"Failed to initialize LLM: {e}")