diff --git a/python/packages/hosting/README.md b/python/packages/hosting/README.md
index 05f42da4bb0..1910c7c615c 100644
--- a/python/packages/hosting/README.md
+++ b/python/packages/hosting/README.md
@@ -81,8 +81,12 @@ agent = OpenAIChatClient().as_agent(name="Assistant")
 state = AgentState(agent, session_store=FileSessionStore("storage/sessions"))
 session = await state.get_or_create_session("conversation-1")
 result = await (await state.get_target()).run("Hello", session=session)
+await state.set_session("conversation-1", session)
 ```
 
+`get_or_create_session(...)` returns a working copy. Save the updated session after
+each successful run so the next request with the same id retains its state.
+
 If a protocol mints a new continuation id on every response, store the session
 explicitly after `run(...)` returns. `run(...)` may update the session, so store
 the post-run object: