feat(sdk): rename experimental_thread to thread (#1806)

.changeset/deep-icons-chew.md

@@ -0,0 +1,5 @@
+---
+"@langchain/langgraph-sdk": minor
+---
+
+Rename `experimental_thread` to `thread`, allowing replacing built-in history fetching hook with React Query / SWR

libs/sdk/src/react/stream.lgp.tsx

@@ -270,12 +270,12 @@ export function useStreamLGP<
     threadId,
     historyLimit,
     {
-      passthrough: options.experimental_thread != null,
+      passthrough: options.thread != null,
       submittingRef: threadIdStreamingRef,
       onError: options.onError,
     }
   );
-  const history = options.experimental_thread ?? builtInHistory;
+  const history = options.thread ?? builtInHistory;
 
   const getMessages = (value: StateType): Message[] => {
     const messagesKey = options.messagesKey ?? "messages";

libs/sdk/src/react/types.tsx

@@ -284,9 +284,8 @@ export interface UseStreamOptions<
 
   /**
    * Manage the thread state externally.
-   * @experimental
    */
-  experimental_thread?: UseStreamThread<StateType>;
+  thread?: UseStreamThread<StateType>;
 
   /**
    * Throttle the stream.