fix(sdk): tighten slash command observation and regression coverage

python/sdk/examples/README.i18n.yaml

@@ -15,8 +15,8 @@
   en: 3471642d8444d0e9
   zh: 7831f28295a6e68a
 /python-sdk-example/review-a-plan:
-  en: bd0da5138a033eba
-  zh: f291c3ae8967e936
+  en: 46758c022608af0f
+  zh: 09b5a59176c11176
 /python-sdk-example/run-a-goal:
   en: ae73e9fd9d402047
   zh: f9694bc6a6e12929

python/sdk/examples/README.md

@@ -68,7 +68,7 @@ python python/sdk/examples/plan.py \
   "Plan the requested change and present it for review."
 ```
 
-The native plan is carried in `exit_plan_mode`, not written to a workspace document. Permissions remain workspace-write. Dismissal leaves plan mode active and ends the current turn. The example waits through `session/wait`; its question callback is independent of the protocol reader.
+The native plan is carried in `exit_plan_mode`, not written to a workspace document. Permissions remain workspace-write. Dismissal leaves plan mode active and ends the current turn. The example waits through `session/wait` and rejects truncated or failed root turns; its question callback is independent of the protocol reader.
 
 <a id="run-a-goal"></a>
 ## Run a goal

python/sdk/examples/README.zh.md

@@ -68,7 +68,7 @@ python python/sdk/examples/plan.py \
   "Plan the requested change and present it for review."
 ```
 
-原生计划通过 `exit_plan_mode` 携带，而不是写入工作区文档。权限仍为 workspace-write。关闭审查会保留计划模式并结束当前轮次。示例通过 `session/wait` 等待，问答回调独立于协议读取线程。
+原生计划通过 `exit_plan_mode` 携带，而不是写入工作区文档。权限仍为 workspace-write。关闭审查会保留计划模式并结束当前轮次。示例通过 `session/wait` 等待，并报告根轮次截断或失败；问答回调独立于协议读取线程。
 
 <a id="run-a-goal"></a>
 ## 运行目标

python/sdk/examples/plan.py

@@ -40,14 +40,19 @@ def review(request: UserQuestionRequest, cancelled: threading.Event) -> dict:
         return {"cancelled": True}
 
 
-def display(notification: Notification) -> None:
-    """Print completed assistant text while the Session runs."""
+def display(notification: Notification, session_id: str) -> None:
+    """Print assistant text and report an unsuccessful root Session turn."""
     if notification.method == "session.event":
         event = notification.payload.get("event")
         if isinstance(event, dict) and event.get("type") == "assistant/message":
             text = final_response([event])
             if text:
                 print(text)
+        elif (isinstance(event, dict) and event.get("type") == "turn/end"
+              and notification.payload.get("sessionId") == session_id):
+            reason = event["data"]["reason"]
+            if reason["kind"] != "completed":
+                raise RuntimeError(f"Agent turn ended: {reason}")
 
 
 def main() -> None:
@@ -75,7 +80,7 @@ def main() -> None:
                         raise RuntimeError(message.result.text)
             harness.client.request(
                 "session/wait", {"sessionId": session.id}, response_model=WaitResult,
-                on_notification=display, notification_subscription=notifications,
+                on_notification=lambda notice: display(notice, session.id), notification_subscription=notifications,
             )