diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/codex_app_server/execution.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/codex_app_server/execution.rs
index 2c31b17c9..72b02c321 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/codex_app_server/execution.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/codex_app_server/execution.rs
@@ -322,6 +322,19 @@ impl ResponseDeliveryFailure {
             Self::TurnBindMismatch => "turn-bind-mismatch",
         }
     }
+
+    /// 写进回合终态说明的收束原因。
+    ///
+    /// 两种失败对用户的意义不同：写失败是回包真的没送出去；绑定不一致是回包已经产出，只是宿主
+    /// 无法确认它属于哪一轮。不能共用「回包丢失」这一句，否则报告会把绑定问题说成丢包。
+    fn interrupt_reason(self) -> &'static str {
+        match self {
+            Self::Write => "执行许可回包丢失，不能确认原操作是否已执行。",
+            Self::TurnBindMismatch => {
+                "回合绑定与当前 app-server 不一致，无法确认本轮操作的作用域；已停止本轮执行。"
+            }
+        }
+    }
 }
 
 impl ExecutionAdapter {
@@ -862,9 +875,7 @@ impl ExecutionAdapter {
         );
         let adapter = Arc::clone(self);
         tokio::spawn(async move {
-            adapter
-                .interrupt("执行许可回包丢失，不能确认原操作是否已执行。")
-                .await;
+            adapter.interrupt(cause.interrupt_reason()).await;
         });
     }
 
@@ -1898,4 +1909,14 @@ mod tests {
         assert!(key.contains("lease-admit-failed"), "{key}");
         assert!(!key.contains("/home/someone"), "留痕不得带绝对路径：{key}");
     }
+
+    #[test]
+    fn response_delivery_failure_texts_match_their_cause() {
+        assert!(ResponseDeliveryFailure::Write
+            .interrupt_reason()
+            .contains("回包丢失"));
+        let bind = ResponseDeliveryFailure::TurnBindMismatch.interrupt_reason();
+        assert!(bind.contains("绑定"), "{bind}");
+        assert!(!bind.contains("回包丢失"), "绑定失败不是回包丢失：{bind}");
+    }
 }
diff --git a/docs/project-memory/shared-memory/decision-log.md b/docs/project-memory/shared-memory/decision-log.md
index 8e1fc3c67..6b3318345 100644
--- a/docs/project-memory/shared-memory/decision-log.md
+++ b/docs/project-memory/shared-memory/decision-log.md
@@ -4,7 +4,7 @@
 
 - 决策：宿主拒绝 app-server 的审批 / 交互请求时，原因必须落 AppData `RUST` 日志。稳定键 `agent.direct_codex.approval.denied`，字段为 `thread_id` / `method` / `reason` / `distinct_reasons`；未绑定宿主执行器时另记 `agent.direct_codex.interaction.no_adapter`（`method` / `outcome`，`outcome` 区分 `decline` / `empty-permissions` / `unsupported-method`）；回包未送达另记 `agent.direct_codex.approval.response_delivery_failed`，`cause` 区分 `response-write-failed` 与 `turn-bind-mismatch`。
 - 原因：线上对审批只回 `{"decision":"decline"}`，模型与用户都看不到是哪一道闸门（合同缺失 / 预算耗尽 / 阶段已收束 / item 不在途 / 无适配器）拦下的，只能靠复现。
-- 边界：`reason` 只接受 `execution.rs` 内的静态分类或宿主自己的错误文本；透传的宿主错误在留痕出口统一走 `sanitize_diagnostic_message`，不带请求参数、上游正文、路径或凭据（去重键也用脱敏后的文本）。有界去重一律按 `MAX_DENIED_REASON_LOGS = 64` 条封顶——适配器路径按回合内 `(method, reason)`、未绑定执行器路径按进程级 `(method, outcome)`、回包未送达按回合内原因各只记一次。
+- 边界：`reason` 只接受 `execution.rs` 内的静态分类或宿主自己的错误文本；透传的宿主错误在留痕出口统一走 `sanitize_diagnostic_message`，不带请求参数、上游正文、路径或凭据（去重键也用脱敏后的文本）。有界去重一律按 `MAX_DENIED_REASON_LOGS = 64` 条封顶——适配器路径按回合内 `(method, reason)`、未绑定执行器路径按进程级 `(method, outcome)`、回包未送达按回合内原因各只记一次。拒绝留痕在释放审批临界区（`state`）之后进行；回合收束说明按 `cause` 区分，只有 `response-write-failed` 才说「回包丢失」，`turn-bind-mismatch` 说明作用域无法确认。
 - 影响范围：`apps/ai-game-creator-shell/src-tauri/src/agent/codex_app_server/execution.rs`。
 - 验证：`cargo test --bin genarrative-ai-game-creator-shell agent::codex_app_server::execution::tests`（15 passed，含 `denied_approval_records_its_reason_once_per_turn`、`denied_reason_logging_is_bounded`）、`npm run check:encoding`、`git diff --check`。