Auto-reply: delay onAgentRunStart until real activity

src/auto-reply/reply/agent-runner-execution.ts

@@ -88,7 +88,14 @@ export async function runAgentTurnWithFallback(params: {
   const directlySentBlockKeys = new Set<string>();
 
   const runId = params.opts?.runId ?? crypto.randomUUID();
-  params.opts?.onAgentRunStart?.(runId);
+  let didNotifyAgentRunStart = false;
+  const notifyAgentRunStart = () => {
+    if (didNotifyAgentRunStart) {
+      return;
+    }
+    didNotifyAgentRunStart = true;
+    params.opts?.onAgentRunStart?.(runId);
+  };
   if (params.sessionKey) {
     registerAgentRunContext(runId, {
       sessionKey: params.sessionKey,
@@ -160,6 +167,7 @@ export async function runAgentTurnWithFallback(params: {
 
           if (isCliProvider(provider, params.followupRun.run.config)) {
             const startedAt = Date.now();
+            notifyAgentRunStart();
             emitAgentEvent({
               runId,
               stream: "lifecycle",
@@ -310,6 +318,12 @@ export async function runAgentTurnWithFallback(params: {
                 : undefined,
             onReasoningEnd: params.opts?.onReasoningEnd,
             onAgentEvent: async (evt) => {
+              // Signal run start only after the embedded agent emits real activity.
+              const hasLifecyclePhase =
+                evt.stream === "lifecycle" && typeof evt.data.phase === "string";
+              if (evt.stream !== "lifecycle" || hasLifecyclePhase) {
+                notifyAgentRunStart();
+              }
               // Trigger typing when tools start executing.
               // Must await to ensure typing indicator starts before tool summaries are emitted.
               if (evt.stream === "tool") {