langgraph adapter

langgraph_qwen/utils.py

@@ -0,0 +1,22 @@
+_DOTENV_LOADED = False
+
+
+def ensure_env_loaded() -> None:
+    global _DOTENV_LOADED
+    if _DOTENV_LOADED:
+        return
+    try:
+        # Lazy import to avoid hard failure if not installed
+        from dotenv import load_dotenv, find_dotenv  # type: ignore
+
+        path = find_dotenv(usecwd=True)
+        if path:
+            load_dotenv(dotenv_path=path, override=False)
+        else:
+            # Fall back to default discovery in CWD
+            load_dotenv(override=False)
+    except Exception:
+        # Silently ignore if python-dotenv is not available or errors out
+        pass
+    _DOTENV_LOADED = True
+