diff --git a/apps/agent/pyproject.toml b/apps/agent/pyproject.toml
index 01d10332..33f7ff98 100644
--- a/apps/agent/pyproject.toml
+++ b/apps/agent/pyproject.toml
@@ -25,6 +25,9 @@ dependencies = [
     "markdownify>=1.2.2",
     "langchain-anthropic>1.1.0",
     "langgraph-cli[inmem]>=0.4.12",
+    # LangSmith SDK for sandbox management
+    "langsmith>=0.7.1",
+]
 ]
 
 [project.optional-dependencies]