diff --git a/agent.py b/agent.py
index 450b304..72fee51 100644
--- a/agent.py
+++ b/agent.py
@@ -97,6 +97,10 @@ class HistoryResult(BaseModel):
     history: list[dict[str, Any]]
 
 
+class DurableDashboardState(BaseModel):
+    last_dashboard_id: str | None = None
+
+
 class ProductionProofV116HighUtili72553(
     A2AAgent[ProductionProofV116HighUtili72553Config, PlatformUserAuth]
 ):