diff --git a/requirements.txt b/requirements.txt
index 5b46330..e6ccb60 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,7 @@
 # a2a-pack is auto-installed by the deploy build.
+# These starter deps power the DeepAgents tool-calling example in agent.py.
+deepagents>=0.5.0
+langchain>=0.3
+langchain-openai>=0.2
+langgraph>=0.6
 psycopg[binary]>=3.2
-pytest>=8.0
-pytest-asyncio>=0.23