fix: empty resumable input

Author: cristipufu

pyproject.toml

@@ -5,7 +5,8 @@ description = "UiPath Langchain"
 readme = { file = "README.md", content-type = "text/markdown" }
 requires-python = ">=3.11"
 dependencies = [
-    "uipath>=2.2.7, <2.3.0",
+    "uipath-runtime>=0.1.2, <0.2.0",
+    "uipath>=2.2.8, <2.3.0",
     "langgraph>=1.0.0, <2.0.0",
     "langchain-core>=1.0.0, <2.0.0",
     "langgraph-checkpoint-sqlite>=3.0.0, <4.0.0",

src/uipath_langchain/runtime/runtime.py

@@ -198,8 +198,8 @@ async def _get_graph_input(
     ) -> Any:
         """Process and return graph input."""
         if options and options.resume:
-            return Command(resume=input)
-        return input
+            return Command(resume=input or {})
+        return input or {}
 
     async def _get_graph_state(
         self,