From 2e8d1634d05cdcdf1926852375234de71b9669e0 Mon Sep 17 00:00:00 2001
From: Magnar Ovedal Myrtveit <magnar@myrtveit.com>
Date: Sat, 21 Dec 2024 22:12:52 +0100
Subject: [PATCH] Pass input value to `handleChainStart` in
 `_transformStreamWithConfig`

---
 langchain-core/src/runnables/base.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/langchain-core/src/runnables/base.ts b/langchain-core/src/runnables/base.ts
index 09c8c7162ee9..7f97a5fd6ccf 100644
--- a/langchain-core/src/runnables/base.ts
+++ b/langchain-core/src/runnables/base.ts
@@ -521,7 +521,7 @@ export abstract class Runnable<
         async () =>
           callbackManager_?.handleChainStart(
             this.toJSON(),
-            { input: "" },
+            finalInput,
             config.runId,
             config.runType,
             undefined,