diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/codex_app_server/mod.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/codex_app_server/mod.rs
index b8f0316ba..b6f22d0f8 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/codex_app_server/mod.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/codex_app_server/mod.rs
@@ -5699,7 +5699,7 @@ mod tests {
                 failure: None,
                 at: Some(_),
                 user_item_id: Some(user_item_id),
-            }] if status == "aborted" && user_item_id == "direct-codex:client-turn-exited:user"
+            }] if *status == TurnCompletedStatus::Aborted && user_item_id == "direct-codex:client-turn-exited:user"
         ));
 
         let next = TurnReservation::accept_for_test(&thread_id, "client-turn-next");
@@ -8263,12 +8263,13 @@ done
             .find_map(|event| match event {
                 ThreadEvent::TurnCompleted {
                     status, failure, ..
-                } => Some((status.clone(), failure.clone())),
+                } => Some((*status, failure.clone())),
                 _ => None,
             })
             .expect("连接死亡之后逻辑回合必须有终态");
         assert_eq!(
-            terminal.0, "failed",
+            terminal.0,
+            TurnCompletedStatus::Failed,
             "失败事实必须先落地：{:?}",
             consumed.events
         );
diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/direct_runtime/mod.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/direct_runtime/mod.rs
index a97a3834c..b915c5ece 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/direct_runtime/mod.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/direct_runtime/mod.rs
@@ -5324,7 +5324,7 @@ mod tests {
         assert!(
             matches!(
                 terminal,
-                ThreadEvent::TurnCompleted { status, .. } if status == "aborted"
+                ThreadEvent::TurnCompleted { status, .. } if *status == TurnCompletedStatus::Aborted
             ),
             "{terminal:?}"
         );
diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/direct_runtime/user_input.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/direct_runtime/user_input.rs
index 1b09fd929..2fbc2d2f6 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/direct_runtime/user_input.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/direct_runtime/user_input.rs
@@ -206,7 +206,7 @@ mod tests {
             .collect::<Vec<_>>();
         assert_eq!(terminal.len(), 1, "一轮只许有一条终态：{events:?}");
         let (status, failure, user_item_id) = terminal[0];
-        assert_eq!(status, "failed");
+        assert_eq!(*status, TurnCompletedStatus::Failed);
         let failure = failure.as_ref().expect("失败终态必须带载荷");
         assert!(
             !failure_detail(failure).trim().is_empty(),
@@ -333,7 +333,7 @@ mod tests {
             .collect::<Vec<_>>();
         assert_eq!(terminals.len(), 1, "一轮只许有一条终态：{events:?}");
         let (status, failure) = terminals[0];
-        assert_eq!(status, "failed");
+        assert_eq!(*status, TurnCompletedStatus::Failed);
         let failure = failure.as_ref().expect("失败终态必须带载荷");
         let detail = failure_detail(failure);
         assert!(detail.contains("写入本项目对话历史失败"), "{detail}");
diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/thread_manager/dispatch.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/thread_manager/dispatch.rs
index 37098a5f8..77e9ed922 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/thread_manager/dispatch.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/thread_manager/dispatch.rs
@@ -291,7 +291,7 @@ mod tests {
     use super::*;
     use crate::agent::{
         consume_thread, enqueue_pending_turn, subscribe_thread, thread_turn_is_active, Deadline,
-        PendingTurn, ThreadEvent, TimedOut, TurnFailure,
+        PendingTurn, ThreadEvent, TimedOut, TurnCompletedStatus, TurnFailure,
     };
     use uuid::Uuid;
 
@@ -426,7 +426,7 @@ mod tests {
             matches!(
                 events.get(terminal),
                 Some(ThreadEvent::TurnCompleted { status, failure: Some(failure), .. })
-                    if status == "failed" && matches!(failure, TurnFailure::HostDropped)
+                    if *status == TurnCompletedStatus::Failed && matches!(failure, TurnFailure::HostDropped)
             ),
             "{events:?}"
         );
@@ -489,7 +489,7 @@ mod tests {
         assert!(
             events.iter().any(|event| matches!(
                 event,
-                ThreadEvent::TurnCompleted { status, .. } if status == "aborted"
+                ThreadEvent::TurnCompleted { status, .. } if *status == TurnCompletedStatus::Aborted
             )),
             "{events:?}"
         );
diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/thread_manager/mod.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/thread_manager/mod.rs
index a5889f166..da0fdff89 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/thread_manager/mod.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/thread_manager/mod.rs
@@ -1241,13 +1241,13 @@ mod tests {
         let mut manager = ThreadManager::with_limits(100, 100_000);
         manager.append(
             "thread-1",
-            ThreadEvent::turn_completed("completed".to_string(), FIXED_AT_MS),
+            ThreadEvent::turn_completed(TurnOutcome::Completed, FIXED_AT_MS),
         );
         let bootstrap = manager.subscribe("thread-1");
         assert!(matches!(
             bootstrap.events.as_slice(),
             [ThreadEvent::TurnCompleted { status, at, .. }]
-                if status == "completed" && *at == Some(FIXED_AT_MS)
+                if *status == TurnCompletedStatus::Completed && *at == Some(FIXED_AT_MS)
         ));
     }
 
@@ -1266,7 +1266,7 @@ mod tests {
         assert!(matches!(
             bootstrap.events.as_slice(),
             [ThreadEvent::TurnCompleted { status, failure, at, .. }]
-                if status == "failed"
+                if *status == TurnCompletedStatus::Failed
                     && failure.as_ref().is_some_and(|failure| matches!(
                         failure,
                         crate::agent::TurnFailure::HostDropped
@@ -1350,7 +1350,7 @@ mod tests {
         );
         manager.append(
             "thread-1",
-            ThreadEvent::turn_completed("completed".to_string(), 3_000)
+            ThreadEvent::turn_completed(TurnOutcome::Completed, 3_000)
                 .with_user_item_id(Some("direct-codex:turn-1:user")),
         );
         let second = manager.subscribe("thread-1");
@@ -1439,7 +1439,7 @@ mod tests {
 
         manager.complete_turn(
             thread_id,
-            ThreadEvent::turn_completed("completed".to_string(), 5_000),
+            ThreadEvent::turn_completed(TurnOutcome::Completed, 5_000),
         );
         assert!(snapshot_of(&manager, thread_id).is_none());
     }
@@ -1733,7 +1733,7 @@ mod tests {
         assert!(
             matches!(
                 events[0],
-                ThreadEvent::TurnCompleted { ref status, .. } if status == "aborted"
+                ThreadEvent::TurnCompleted { ref status, .. } if *status == TurnCompletedStatus::Aborted
             ),
             "{events:?}"
         );
@@ -1832,7 +1832,7 @@ mod tests {
 
         complete_turn(
             &thread_id,
-            ThreadEvent::turn_completed("completed".to_string(), 5_000),
+            ThreadEvent::turn_completed(TurnOutcome::Completed, 5_000),
         );
         assert_eq!(
             crate::agent::direct_active_turns_event_test_count(),
diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/thread_manager/turn_completion.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/thread_manager/turn_completion.rs
index 4d243a87e..b660d2f55 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/thread_manager/turn_completion.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/thread_manager/turn_completion.rs
@@ -16,7 +16,7 @@
 
 use std::path::Path;
 
-use crate::agent::{ThreadEvent, TurnError, Unclassified};
+use crate::agent::{ThreadEvent, TurnError, TurnOutcome, Unclassified};
 
 use super::wire::TurnFailure;
 
@@ -40,11 +40,11 @@ impl TurnCompletion {
     pub(crate) fn event(self, completed_at: u64, user_item_id: Option<&str>) -> ThreadEvent {
         let event = match self {
             Self::Failed(failure) => ThreadEvent::turn_completed_failed(failure, completed_at),
-            Self::Completed => ThreadEvent::turn_completed("completed".to_string(), completed_at),
+            Self::Completed => ThreadEvent::turn_completed(TurnOutcome::Completed, completed_at),
             Self::Interrupted => {
-                ThreadEvent::turn_completed("interrupted".to_string(), completed_at)
+                ThreadEvent::turn_completed(TurnOutcome::Interrupted, completed_at)
             }
-            Self::Aborted => ThreadEvent::turn_completed("aborted".to_string(), completed_at),
+            Self::Aborted => ThreadEvent::turn_completed(TurnOutcome::Aborted, completed_at),
         };
         event.with_user_item_id(user_item_id)
     }
@@ -142,7 +142,8 @@ impl SessionOutcome {
 mod tests {
     use super::*;
     use crate::agent::{
-        ModelCallKind, ThreadEvent, TransportClosed, TurnError, TurnInterrupted, Unclassified,
+        ModelCallKind, ThreadEvent, TransportClosed, TurnCompletedStatus, TurnError,
+        TurnInterrupted, Unclassified,
     };
     use platform_llm::LlmError;
 
@@ -288,7 +289,7 @@ stderrClass=nonempty；stderrBytes=1000";
         assert!(event.failure().is_none());
         assert!(matches!(
             event,
-            ThreadEvent::TurnCompleted { ref status, .. } if status == "completed"
+            ThreadEvent::TurnCompleted { ref status, .. } if *status == TurnCompletedStatus::Completed
         ));
     }
 
diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/thread_manager/wire/tests.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/thread_manager/wire/tests.rs
index 757d8b0b9..37fd9a3f7 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/thread_manager/wire/tests.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/thread_manager/wire/tests.rs
@@ -366,7 +366,7 @@ fn lifecycle_events_serialize_event_level_at_as_optional_number() {
     );
 
     let completed =
-        serde_json::to_value(ThreadEvent::turn_completed("completed".to_string(), 2_000))
+        serde_json::to_value(ThreadEvent::turn_completed(TurnOutcome::Completed, 2_000))
             .expect("serialize turn.completed");
     assert_eq!(
         completed,
@@ -437,7 +437,7 @@ fn lifecycle_events_carry_optional_opener_user_item_id() {
         started
     );
 
-    let completed = ThreadEvent::turn_completed("interrupted".to_string(), 2_000)
+    let completed = ThreadEvent::turn_completed(TurnOutcome::Interrupted, 2_000)
         .with_user_item_id(Some("direct-codex:turn-1:user"));
     assert_eq!(completed.user_item_id(), Some("direct-codex:turn-1:user"));
     assert_eq!(
@@ -526,7 +526,7 @@ fn turn_completed_carries_failure_payload_only_when_failed() {
     );
 
     // 正常终态不带载荷，也不回写 `failure: null`。
-    let completed = ThreadEvent::turn_completed("completed".to_string(), 5_000);
+    let completed = ThreadEvent::turn_completed(TurnOutcome::Completed, 5_000);
     assert_eq!(completed.failure(), None);
     assert_eq!(
         serde_json::to_value(&completed).expect("serialize completed turn"),
diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/thread_manager/wire/turn.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/thread_manager/wire/turn.rs
index ca053d12f..be73d909f 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/thread_manager/wire/turn.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/thread_manager/wire/turn.rs
@@ -31,6 +31,41 @@ pub(crate) enum QueueRemovalOutcome {
     NotFound,
 }
 
+/// `turn.completed` 的终态取值。
+///
+/// 正常收场是前三档、不带载荷；`Failed` **一定**带 [`TurnFailure`] 载荷，只由
+/// [`ThreadEvent::turn_completed_failed`] 写出。
+#[derive(Clone, Copy, Debug, Eq, PartialEq, Serialize, Deserialize, TS)]
+#[serde(rename_all = "lowercase")]
+#[ts(export, export_to = concat!(env!("CARGO_MANIFEST_DIR"), "/../src/view/project-development/chat/generated/"))]
+pub(crate) enum TurnCompletedStatus {
+    Completed,
+    Interrupted,
+    Aborted,
+    Failed,
+}
+
+/// 正常收场的三档（不含失败）：只作 [`ThreadEvent::turn_completed`] 的构造参数，不进线上形状。
+///
+/// 失败必须带载荷，所以这里没有 `Failed`——这就是 [`ThreadEvent::turn_completed`] 写不出
+/// "failed 但没有载荷"的原因。
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+pub(crate) enum TurnOutcome {
+    Completed,
+    Interrupted,
+    Aborted,
+}
+
+impl From<TurnOutcome> for TurnCompletedStatus {
+    fn from(outcome: TurnOutcome) -> Self {
+        match outcome {
+            TurnOutcome::Completed => Self::Completed,
+            TurnOutcome::Interrupted => Self::Interrupted,
+            TurnOutcome::Aborted => Self::Aborted,
+        }
+    }
+}
+
 /// Thread Manager 下发的运行态事件。
 ///
 /// 顺序由数组顺序给出（同一个 subscriber 的 `consume` 按队列顺序返回），因此不需要 `seq`：
@@ -72,9 +107,10 @@ pub(crate) enum ThreadEvent {
     },
     #[serde(rename = "turn.completed")]
     TurnCompleted {
-        /// 终态语义：`completed` / `interrupted` / `aborted` 是正常收场；`failed` 是**失败**，
-        /// 此时必须带 `failure` 载荷。
-        status: String,
+        /// 终态语义：`completed` / `interrupted` / `aborted` 是正常收场，不带载荷；`failed` 是
+        /// **失败**，一定带 `failure` 载荷。正常收场的构造参数是 [`TurnOutcome`]（不含 `Failed`），
+        /// [`ThreadEvent::turn_completed`] 因此写不出"failed 但没有载荷"。
+        status: TurnCompletedStatus,
         /// 失败载荷：只有 `status == "failed"` 才有；失败原因只从这里下发一次。
         #[serde(default, skip_serializing_if = "Option::is_none")]
         #[ts(optional)]
@@ -155,19 +191,19 @@ impl ThreadEvent {
         }
     }
 
-    pub(crate) fn turn_completed(status: String, at: u64) -> Self {
+    pub(crate) fn turn_completed(status: TurnOutcome, at: u64) -> Self {
         Self::TurnCompleted {
-            status,
+            status: status.into(),
             failure: None,
             at: Some(at),
             user_item_id: None,
         }
     }
 
-    /// 失败终态：`status` 固定 `"failed"`，原因必须随事件一起带出去。
+    /// 失败终态：`status` 固定 `failed`，原因必须随事件一起带出去。
     pub(crate) fn turn_completed_failed(failure: TurnFailure, at: u64) -> Self {
         Self::TurnCompleted {
-            status: "failed".to_string(),
+            status: TurnCompletedStatus::Failed,
             failure: Some(failure),
             at: Some(at),
             user_item_id: None,
diff --git a/apps/ai-game-creator-shell/src/view/project-development/chat/generated/ThreadEvent.ts b/apps/ai-game-creator-shell/src/view/project-development/chat/generated/ThreadEvent.ts
index 40ce33131..6f3d2ec95 100644
--- a/apps/ai-game-creator-shell/src/view/project-development/chat/generated/ThreadEvent.ts
+++ b/apps/ai-game-creator-shell/src/view/project-development/chat/generated/ThreadEvent.ts
@@ -3,6 +3,7 @@ import type { QueueRemovalReason } from './QueueRemovalReason';
 import type { ThreadDeltaKind } from './ThreadDeltaKind';
 import type { ThreadItem } from './ThreadItem';
 import type { ThreadRequestKind } from './ThreadRequestKind';
+import type { TurnCompletedStatus } from './TurnCompletedStatus';
 import type { TurnFailure } from './TurnFailure';
 import type { UserItem } from './UserItem';
 
@@ -47,10 +48,11 @@ export type ThreadEvent =
   | {
       type: 'turn.completed';
       /**
-       * 终态语义：`completed` / `interrupted` / `aborted` 是正常收场；`failed` 是**失败**，
-       * 此时必须带 `failure` 载荷。
+       * 终态语义：`completed` / `interrupted` / `aborted` 是正常收场，不带载荷；`failed` 是
+       * **失败**，一定带 `failure` 载荷。正常收场的构造参数是 [`TurnOutcome`]（不含 `Failed`），
+       * [`ThreadEvent::turn_completed`] 因此写不出"failed 但没有载荷"。
        */
-      status: string;
+      status: TurnCompletedStatus;
       /**
        * 失败载荷：只有 `status == "failed"` 才有；失败原因只从这里下发一次。
        */
diff --git a/apps/ai-game-creator-shell/src/view/project-development/chat/generated/TurnCompletedStatus.ts b/apps/ai-game-creator-shell/src/view/project-development/chat/generated/TurnCompletedStatus.ts
new file mode 100644
index 000000000..3b9c3c203
--- /dev/null
+++ b/apps/ai-game-creator-shell/src/view/project-development/chat/generated/TurnCompletedStatus.ts
@@ -0,0 +1,13 @@
+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+
+/**
+ * `turn.completed` 的终态取值。
+ *
+ * 正常收场是前三档、不带载荷；`Failed` **一定**带 [`TurnFailure`] 载荷，只由
+ * [`ThreadEvent::turn_completed_failed`] 写出。
+ */
+export type TurnCompletedStatus =
+  | 'completed'
+  | 'interrupted'
+  | 'aborted'
+  | 'failed';