diff --git a/webui/src/web-components/sketch-app-shell.ts b/webui/src/web-components/sketch-app-shell.ts
index 43ae3bd..59fb921 100644
--- a/webui/src/web-components/sketch-app-shell.ts
+++ b/webui/src/web-components/sketch-app-shell.ts
@@ -1458,6 +1458,8 @@
                 .agentState=${this.containerState?.agent_state}
                 .llmCalls=${this.containerState?.outstanding_llm_calls || 0}
                 .toolCalls=${this.containerState?.outstanding_tool_calls || []}
+                .firstMessageIndex=${this.containerState?.first_message_index ||
+                0}
               ></sketch-timeline>
             </div>
           </div>