diff --git a/apps/ai-game-creator-shell/src-tauri/src/process_session/lifecycle.rs b/apps/ai-game-creator-shell/src-tauri/src/process_session/lifecycle.rs
index 23b7fc096..472f29421 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/process_session/lifecycle.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/process_session/lifecycle.rs
@@ -1022,7 +1022,12 @@ fn append_process_output_line(live: &LiveProcessSession, line: &[u8]) -> bool {
             output.stdin_open = false;
             live.output_changed.notify_all();
         }
-        let _ = live.control.send(ProcessControl::Terminate);
+        if let Err(error) = live.control.send(ProcessControl::Terminate) {
+            app_log!(
+                "process_session.terminate_after_snapshot_failed processId={} detail={error}",
+                live.process_id
+            );
+        }
     }
     true
 }
@@ -1175,7 +1180,13 @@ fn drain_process_session_output(
                                         }
                                         live.output_changed.notify_all();
                                     }
-                                    let _ = live.control.send(ProcessControl::Terminate);
+                                    if let Err(error) = live.control.send(ProcessControl::Terminate)
+                                    {
+                                        app_log!(
+                                            "process_session.terminate_after_conpty_failed processId={} detail={error}",
+                                            live.process_id
+                                        );
+                                    }
                                     return;
                                 }
                                 conpty_cursor_replied = true;
@@ -1255,7 +1266,12 @@ fn drain_process_session_output(
                         output.stdin_open = false;
                         live.output_changed.notify_all();
                     }
-                    let _ = live.control.send(ProcessControl::OutputLimit);
+                    if let Err(error) = live.control.send(ProcessControl::OutputLimit) {
+                        app_log!(
+                            "process_session.output_limit_control_failed processId={} detail={error}",
+                            live.process_id
+                        );
+                    }
                     break;
                 }
             }
@@ -1272,7 +1288,12 @@ fn drain_process_session_output(
                     }
                     live.output_changed.notify_all();
                 }
-                let _ = live.control.send(ProcessControl::Terminate);
+                if let Err(error) = live.control.send(ProcessControl::Terminate) {
+                    app_log!(
+                        "process_session.terminate_after_output_read_failed processId={} detail={error}",
+                        live.process_id
+                    );
+                }
                 break;
             }
         }
diff --git a/docs/project-memory/shared-memory/pitfalls.md b/docs/project-memory/shared-memory/pitfalls.md
index 268afafcd..9c832253b 100644
--- a/docs/project-memory/shared-memory/pitfalls.md
+++ b/docs/project-memory/shared-memory/pitfalls.md
@@ -26,6 +26,8 @@ Direct 的 Tauri 进度、活动回合和 manifest 事件不能忽略 `app.emit`
 
 进程会话在状态落盘失败后发送终止控制、关闭时发送 shutdown 的失败也要记录；否则会出现“状态已标记需核对，但目标进程仍活着”而诊断只显示落盘失败的半条事实。
 
+进程输出超限、ConPTY 握手失败、输出读取失败和快照落盘失败后的终止控制也属于同一条诊断链，控制消息发送失败要带 processId 写入日志，不能只留下业务错误正文。
+
 ## 2026-10-03 AGC 随包 plugins 的 feature 档位必须与消费方一致，且门禁会因 build.rs 未重跑而假通过
 
 - **现象**：Windows 本机 `npm run check:generated-bindings`（`npm run lint` 链内，`scripts/check-repository-ci.sh` 的 Repository checks 也走它）在 `build.rs:167:29` panic：`插件随包资源校验失败：随包插件存在未声明文件：.../src-tauri/resources/plugins/agc-godot-editor/native/gdextension/bin/win-x64/agc_godot_editor.dll（目标 x86_64-pc-windows-msvc 与当前 feature 组合不允许；请先执行随包资源准备步骤）`；树上换成 `agc-unity-editor/dotnet/publish/win-x64/Agc.Unity.Attach.exe` 时报同一类错。反向还有更隐蔽的形态：门禁 2 秒就 exit 0 说「通过」，但 tree 上其实带着编辑器产物。