diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/claude_code_cli.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/claude_code_cli.rs
index 827b06682..9f5b91221 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/claude_code_cli.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/claude_code_cli.rs
@@ -732,7 +732,9 @@ pub(crate) async fn direct_game_creator_claude_code_chat_at(
     client_turn_id: Option<&str>,
     observer: Option<&mut (dyn FnMut(DirectCodexTurnObservation) + Send)>,
 ) -> Result<String, String> {
+    direct_turn_trace("claude-executor-enter");
     let (mcp_url, mcp_token) = start_external_mcp_loopback(root, llm.web_search_enabled).await?;
+    direct_turn_trace("claude-mcp-loopback-ready");
     let _mcp_guard = ExternalMcpStopGuard;
     let home = crate::project::resolve_local_project_path(root, ".agent/runtime/claude-code/home")?;
     std::fs::create_dir_all(&home)
@@ -742,6 +744,7 @@ pub(crate) async fn direct_game_creator_claude_code_chat_at(
         .lock()
         .ok()
         .and_then(|sessions| sessions.get(&session_key).cloned());
+    direct_turn_trace("claude-sidecar-start");
     let payload = serde_json::json!({
         "type": "turn",
         "id": client_turn_id.unwrap_or("claude-direct-turn"),
@@ -769,6 +772,7 @@ pub(crate) async fn direct_game_creator_claude_code_chat_at(
         client_turn_id,
     )
     .await?;
+    direct_turn_trace("claude-sidecar-done");
     if let Some(session_id) = sidecar
         .result
         .get("session_id")
@@ -785,6 +789,7 @@ pub(crate) async fn direct_game_creator_claude_code_chat_at(
         .filter_map(|event| serde_json::to_string(&event).ok())
         .collect::<Vec<_>>();
     stream.push(String::new());
+    direct_turn_trace("claude-parse-start");
     parse_direct_stream_result(stream.join("\n").as_bytes(), observer)
 }
 
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 f5059ed82..92d673ebb 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
@@ -4294,6 +4294,24 @@ pub(crate) fn check_direct_turn_preconditions(
         .map_err(|detail| DirectTurnError::InputRejected { detail })?;
     Ok(())
 }
+/// Direct 回合在 `direct_execution::begin` 之后的分段 trace。
+///
+/// 起因：2026-10-02 连续四轮回合都停在 `begin` 之后——账本 `phase=working`、
+/// `nextSequence=0`、`active={}`、没有任何错误 sidecar、stderr 无 panic、连
+/// `agent.direct_codex.*` 都没有。窗口就夹在 `begin` 与执行器调用之间，需要知道
+/// 具体停在哪一步。测试态不写，避免污染本机 AppData。
+#[cfg(not(test))]
+pub(crate) fn direct_turn_trace(stage: &str) {
+    let _ = crate::append_application_log(
+        "info".to_string(),
+        "direct-turn".to_string(),
+        format!("agent.direct_turn.trace stage={stage}"),
+    );
+}
+
+#[cfg(test)]
+pub(crate) fn direct_turn_trace(_stage: &str) {}
+
 pub(crate) async fn run_direct_game_creator_turn_at_with_creation_type_and_emitter(
     root: &Path,
     prompt: &str,
@@ -4401,6 +4419,7 @@ async fn run_direct_game_creator_turn_inner(
     })?;
     let execution_session = execution_guard.session();
     execution_session.set_analytics_capture(capture.clone());
+    direct_turn_trace("session-ready");
     let started = execution_session
         .newly_accepted
         .then(std::time::Instant::now);
@@ -4411,6 +4430,7 @@ async fn run_direct_game_creator_turn_inner(
             }
         }
     }
+    direct_turn_trace("run-analytics-accepted");
     // 在 guard 仍存活时冻结整体结果，避免 Drop 的中断收尾覆盖真实失败原因。
     let result: Result<String, DirectTurnError> = async {
         if let Some(report) = super::direct_delivery::terminal_report(&execution_session) {
@@ -4444,6 +4464,7 @@ async fn run_direct_game_creator_turn_inner(
                 );
             }
         }
+        direct_turn_trace("goal-analytics-accepted");
         emit_direct_game_creator_progress(root, "codex.turn", "陶泥儿正在处理这条消息");
         if let Some(emitter) = turn_emitter {
             emitter.emit("running", Some("preparing"));
@@ -4460,6 +4481,7 @@ async fn run_direct_game_creator_turn_inner(
                     DirectTurnError::turn_failed(DirectCodexFailureStage::CodeGeneration, error)
                 },
             )?;
+        direct_turn_trace("system-prompt-ready");
         // 三维请求：把"自选三维技术栈、解除 Phaser 固定约束"的合同放在系统提示最前，
         // 避免被长度上限截断，也不阻断任何工具。
         let engine_contract = direct_engine_three_dimensional_contract(root, prompt);
@@ -4471,6 +4493,7 @@ async fn run_direct_game_creator_turn_inner(
             None => base_system_prompt,
         };
         let reply = if let Some(emitter) = turn_emitter {
+            direct_turn_trace("executor-dispatch");
             let client_turn_id = emitter.turn_id().to_string();
             let emitter = emitter.clone();
             let mut observer = |observation: DirectCodexTurnObservation| {
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 5eabb23b6..be5bc35cb 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
@@ -13,13 +13,16 @@
 
 use std::path::{Path, PathBuf};
 
+use futures::FutureExt;
+
 #[cfg(test)]
 use crate::agent::PendingTurn;
 use crate::agent::{
     append_direct_project_user_message_at, claim_pending_turn, complete_turn_if_reserved,
-    direct_codex_user_item_to_prompt, direct_now_ms, redact_agent_runtime_error,
-    run_direct_game_creator_turn_at_with_creation_type_and_emitter, thread_id_for_project,
-    DirectGameCreatorTurnUpdateEmitter, DirectTurnError, DirectTurnTerminal, DispatchedTurn,
+    direct_codex_user_item_to_prompt, direct_now_ms, record_direct_codex_failure,
+    redact_agent_runtime_error, run_direct_game_creator_turn_at_with_creation_type_and_emitter,
+    thread_id_for_project, DirectCodexFailureStage, DirectGameCreatorTurnUpdateEmitter,
+    DirectTurnError, DirectTurnTerminal, DispatchedTurn,
 };
 
 /// 一次放行的占用。持有它就代表这一轮还没收口。
@@ -84,13 +87,90 @@ impl Drop for TurnReservation {
     fn drop(&mut self) {
         // 兜底：任务 panic、future 被丢弃、或今后在终态之前新增的 `?` 早退。
         // 这类失败说不出原因，只给分类；能说清原因的错误必须由调用方在更早的地方显式收口。
-        let _ = self.finish_if_unfinished(DirectTurnTerminal::host_dropped());
+        let finalized_by_guard = self.finish_if_unfinished(DirectTurnTerminal::host_dropped());
+        // 兜底一旦真的收口，就说明这一轮**从未写下终态**：深层既没成功也没失败地退出了。
+        // 这条必须留应用日志，否则离线只剩一个 `phase=working` 的账本，无从判断是哪一层
+        // 提前退出（真实案例：2026-10-02 连续两轮只留下 working 账本，errors/ 与
+        // application.log 全空）。测试态不写，避免用例污染本机 AppData。
+        #[cfg(not(test))]
+        if finalized_by_guard {
+            // 项目侧也留一份脱敏诊断：用户在项目目录里就能看到这一轮的收场，
+            // 不必只依赖 AppData 的应用日志。
+            let failure = DirectTurnError::TurnFailed {
+                stage: DirectCodexFailureStage::CodeGeneration,
+                detail: format!(
+                    "DirectProject 宿主任务提前结束（panic、future 被丢弃或被取消），本轮未写下终态；threadId={} turnToken={}",
+                    self.thread_id, self.token
+                ),
+            };
+            let _ = record_direct_codex_failure(Path::new(&self.thread_id), &failure, None);
+            let _ = crate::append_application_log(
+                "error".to_string(),
+                "direct-turn".to_string(),
+                format!(
+                    "agent.direct_turn.host_dropped threadId={} turnToken={} userItemId={} panicking={}",
+                    self.thread_id,
+                    self.token,
+                    self.user_item_id.as_deref().unwrap_or("-"),
+                    // true = 这一轮是被 panic 带走的；false = future 被丢弃或取消。
+                    std::thread::panicking()
+                ),
+            );
+        }
         // 占用的释放就是"这个项目腾出了跑回合的位置"：踢一脚，队里排着的消息不必等下一次用户动作。
         // panic 也走这里，所以队列不会因为一个任务炸掉而永久停住。
         kick_queue_dispatch(Path::new(&self.thread_id));
     }
 }
 
+// 运行段经 task-local 携带回合身份，panic hook 据此把 panic 位置与负载写进应用日志。
+// task-local 而非 thread-local：多线程 runtime 下 future 会跨 worker 迁移。
+tokio::task_local! {
+    static DIRECT_TURN_PANIC_CONTEXT: Option<(String, String)>;
+}
+
+/// 兜底诊断：Direct 回合任务 panic 时，把位置与负载写进应用日志。
+///
+/// 没有它时，panic 只会让 `TurnReservation::drop` 把回合收成 `HostDropped`——那是"说不出原因"
+/// 的分类，离线只留一个 `phase=working` 的账本，`.agent/runtime/errors/` 与 `application.log`
+/// 全空，无法判断是哪一层退出的（真实案例：2026-10-02 连续两轮如此）。
+fn ensure_direct_turn_panic_hook() {
+    static ONCE: std::sync::Once = std::sync::Once::new();
+    ONCE.call_once(|| {
+        let previous = std::panic::take_hook();
+        std::panic::set_hook(Box::new(move |info| {
+            if let Ok(Some((thread_id, token))) = DIRECT_TURN_PANIC_CONTEXT.try_with(Clone::clone) {
+                let location = info
+                    .location()
+                    .map(|location| {
+                        format!(
+                            "{}:{}:{}",
+                            location.file(),
+                            location.line(),
+                            location.column()
+                        )
+                    })
+                    .unwrap_or_else(|| "未知位置".to_string());
+                #[cfg(not(test))]
+                let _ = crate::append_application_log(
+                    "error".to_string(),
+                    "direct-turn".to_string(),
+                    format!(
+                        "agent.direct_turn.panic threadId={} turnToken={} location={} payload={}",
+                        thread_id,
+                        token,
+                        location,
+                        info.payload_as_str().unwrap_or("未知 panic 负载")
+                    ),
+                );
+                #[cfg(test)]
+                let _ = (thread_id, token, location);
+            }
+            previous(info);
+        }));
+    });
+}
+
 /// 踢一脚：让队首那条待发消息有机会变成一轮真的回合。
 ///
 /// 幂等，三个调用点：**入队之后**（队列空且没有回合在跑时，放行就是这一脚，不必再等一个调度周期）、
@@ -109,10 +189,23 @@ pub(crate) fn kick_queue_dispatch(root: &Path) {
         crate::platform_session::current_platform_session_write_state().identity_generation;
     let reservation = TurnReservation::resume(&thread_id, &dispatched);
     let root = root.to_path_buf();
-    tauri::async_runtime::spawn(async move {
+    ensure_direct_turn_panic_hook();
+    let panic_context = Some((thread_id.clone(), dispatched.token.clone()));
+    tauri::async_runtime::spawn(DIRECT_TURN_PANIC_CONTEXT.scope(panic_context, async move {
         run_dispatched_direct_turn(root, dispatched, reservation, release_identity_generation)
             .await;
-    });
+    }));
+}
+
+/// 把 panic 负载转成可读文本：`panic!("…")` 的负载是 `&str`，`panic!("{x}")` 是 `String`。
+fn direct_turn_panic_detail(payload: &(dyn std::any::Any + Send)) -> String {
+    if let Some(text) = payload.downcast_ref::<&str>() {
+        (*text).to_string()
+    } else if let Some(text) = payload.downcast_ref::<String>() {
+        text.clone()
+    } else {
+        "未知 panic 负载".to_string()
+    }
 }
 
 /// 放行之后这一段：取这一轮的调用身份 → 落盘用户条目 → 下发 → 跑整轮。
@@ -149,16 +242,38 @@ async fn run_dispatched_direct_turn(
     crate::agent::codex_app_server::emit_direct_thread_user_item(&root, &canonical_user_item);
     let capture = crate::analytics::gui::capture_writer_context();
     let emitter = DirectGameCreatorTurnUpdateEmitter::new(&root, turn_id);
-    let outcome = run_direct_game_creator_turn_at_with_creation_type_and_emitter(
-        &root,
-        &prompt,
-        dispatched.pending.creation_type.as_deref(),
-        Some(&emitter),
-        Some(canonical_user_item.clone()),
-        capture,
-        release_identity_generation,
+    // 回合体 panic 不能落到 `TurnReservation` 的 Drop 兜底：那会把这一轮收成"说不出原因"的
+    // `HostDropped`，症状正是用户看到的「本轮执行已中断，请重试」，而项目侧诊断与应用日志
+    // **一行都不会有**（真实案例：2026-10-02 连续两轮）。这里把 panic 转成分类失败，
+    // 走与正常失败同一条收口：先写脱敏诊断，再写终态。
+    let outcome = match std::panic::AssertUnwindSafe(
+        run_direct_game_creator_turn_at_with_creation_type_and_emitter(
+            &root,
+            &prompt,
+            dispatched.pending.creation_type.as_deref(),
+            Some(&emitter),
+            Some(canonical_user_item.clone()),
+            capture,
+            release_identity_generation,
+        ),
     )
-    .await;
+    .catch_unwind()
+    .await
+    {
+        Ok(result) => result,
+        Err(payload) => {
+            let failure = DirectTurnError::turn_failed(
+                DirectCodexFailureStage::CodeGeneration,
+                format!(
+                    "DirectProject 宿主任务 panic：{}",
+                    direct_turn_panic_detail(payload.as_ref())
+                ),
+            );
+            let stage = failure.turn_failure_stage();
+            let detail = record_direct_codex_failure(&root, &failure, Some(turn_id.as_str()));
+            Err(DirectTurnError::TurnFailed { stage, detail })
+        }
+    };
     match outcome {
         Ok(_) => {
             // 深层的终态出口已经在 `run_turn` 里写出 `turn.completed`；这里只补最后一条回合更新。