From aafa2b025f23b9f7231145544c74036a538fb40c Mon Sep 17 00:00:00 2001
From: goulustis <cnimaiv@gmail.com>
Date: Thu, 29 Jan 2026 09:44:21 +0800
Subject: [PATCH] add type hinting

---
 lang_agent/pipeline.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lang_agent/pipeline.py b/lang_agent/pipeline.py
index 7a8afa9..9c62035 100644
--- a/lang_agent/pipeline.py
+++ b/lang_agent/pipeline.py
@@ -105,7 +105,7 @@ class Pipeline:
         else:
             logger.info(f"show graph not supported for {type(self.graph)}")
 
-    def invoke(self, *nargs, **kwargs):
+    def invoke(self, *nargs, **kwargs)->str:
         out = self.graph.invoke(*nargs, **kwargs)
 
         # If streaming, yield chunks from the generator