diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/codex_app_server.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/codex_app_server.rs
index 7b5281964..6b6f32d30 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/codex_app_server.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/codex_app_server.rs
@@ -267,6 +267,7 @@ fn game_creator_codex_app_server_connection_error(
 ) -> platform_llm::LlmError {
     match game_creator_codex_app_server_error_http_status(info, field) {
         Some(401 | 403) => game_creator_codex_app_server_error_kind("unauthorized"),
+        Some(413) => game_creator_codex_app_server_error_kind("request-too-large"),
         Some(status_code) => platform_llm::LlmError::Upstream {
             status_code,
             message: "Codex app-server 连接上游失败".to_string(),
@@ -304,6 +305,30 @@ fn game_creator_codex_app_server_error_detail_indicates_auth_failure(
         || detail.contains("http 403")
 }
 
+fn game_creator_codex_app_server_error_detail_indicates_request_too_large(
+    error: &serde_json::Value,
+) -> bool {
+    let Some(error) = error.as_object() else {
+        return false;
+    };
+    let detail = ["message", "additionalDetails", "code"]
+        .into_iter()
+        .filter_map(|field| error.get(field).and_then(serde_json::Value::as_str))
+        .collect::<Vec<_>>()
+        .join(" ")
+        .to_ascii_lowercase();
+    if detail.is_empty() {
+        return false;
+    }
+    detail.contains("413 payload too large")
+        || detail.contains("http 413")
+        || detail.contains("status 413")
+        || detail.contains("payload_too_large")
+        || detail.contains("payload too large")
+        || detail.contains("request too large")
+        || detail.contains("provider request too large")
+}
+
 fn game_creator_codex_app_server_error_detail_indicates_insufficient_mud_points(
     error: &serde_json::Value,
 ) -> bool {
@@ -334,6 +359,9 @@ fn game_creator_codex_app_server_failed_turn_error(
             message: "泥点余额不足".to_string(),
         };
     }
+    if game_creator_codex_app_server_error_detail_indicates_request_too_large(error) {
+        return game_creator_codex_app_server_error_kind("request-too-large");
+    }
     if game_creator_codex_app_server_error_detail_indicates_auth_failure(error) {
         return game_creator_codex_app_server_error_kind("unauthorized");
     }
@@ -4691,6 +4719,12 @@ mod tests {
                     "codex-app-server-error:unauthorized".to_string(),
                 ),
             ),
+            (
+                serde_json::json!({"httpConnectionFailed":{"httpStatusCode":413}}),
+                platform_llm::LlmError::InvalidRequest(
+                    "codex-app-server-error:request-too-large".to_string(),
+                ),
+            ),
             (
                 serde_json::json!({"httpConnectionFailed":{"httpStatusCode":429}}),
                 platform_llm::LlmError::Upstream {
@@ -4751,6 +4785,31 @@ mod tests {
         }
     }
 
+    #[test]
+    fn codex_app_server_failed_turn_maps_request_too_large_details() {
+        for detail in [
+            "HTTP 413 Payload Too Large",
+            "status 413",
+            "PAYLOAD_TOO_LARGE",
+            "provider request too large",
+        ] {
+            let error = game_creator_codex_app_server_failed_turn_error(&serde_json::json!({
+                "status": "failed",
+                "error": {
+                    "message": detail,
+                    "additionalDetails": "private upstream diagnostics",
+                    "codexErrorInfo": "other"
+                }
+            }));
+            assert_eq!(
+                error,
+                platform_llm::LlmError::InvalidRequest(
+                    "codex-app-server-error:request-too-large".to_string(),
+                )
+            );
+        }
+    }
+
     #[test]
     fn codex_app_server_failed_turn_maps_insufficient_mud_points_to_stable_upstream_error() {
         for detail in [
diff --git a/apps/ai-game-creator-shell/src/components/error-report/ErrorReportDialog.tsx b/apps/ai-game-creator-shell/src/components/error-report/ErrorReportDialog.tsx
index d22ea9902..216f04b61 100644
--- a/apps/ai-game-creator-shell/src/components/error-report/ErrorReportDialog.tsx
+++ b/apps/ai-game-creator-shell/src/components/error-report/ErrorReportDialog.tsx
@@ -4,6 +4,7 @@ import {
   ackClientErrorEventsWithRetry,
   type ClientErrorEvent,
   type DiagnosticLogFile,
+  getPendingClientErrorEvents,
   getStableErrorReportSubmissionId,
   readApplicationDiagnosticLogs,
   submitErrorReportBatch,
@@ -12,10 +13,12 @@ import { ThemedModal } from '../modal/ThemedModal';
 
 type ErrorReportDialogProps = {
   open: boolean;
-  events: ClientErrorEvent[];
   onClose: () => void;
+  fallbackEvents?: ClientErrorEvent[];
 };
 
+const emptyFallbackEvents: ClientErrorEvent[] = [];
+
 function diagnosticLogLabel(
   logsReady: boolean,
   logsError: boolean,
@@ -28,9 +31,12 @@ function diagnosticLogLabel(
 
 export function ErrorReportDialog({
   open,
-  events,
   onClose,
+  fallbackEvents = emptyFallbackEvents,
 }: ErrorReportDialogProps) {
+  const [events, setEvents] = useState<ClientErrorEvent[]>([]);
+  const [eventsReady, setEventsReady] = useState(false);
+  const [eventsError, setEventsError] = useState(false);
   const [selectedFingerprints, setSelectedFingerprints] = useState<Set<string>>(
     new Set(),
   );
@@ -45,29 +51,59 @@ export function ErrorReportDialog({
 
   useEffect(() => {
     if (!open) return;
-    setSelectedFingerprints(
-      new Set(events.slice(0, 1).map((event) => event.fingerprint)),
-    );
+    let disposed = false;
+    setEvents([]);
+    setEventsReady(false);
+    setEventsError(false);
+    setSelectedFingerprints(new Set());
     setStatus('');
     setLogsReady(false);
     setLogsError(false);
+    void getPendingClientErrorEvents()
+      .then((nextEvents) => {
+        if (disposed) return;
+        setEvents(nextEvents);
+        setSelectedFingerprints(
+          new Set(nextEvents.map((event) => event.fingerprint)),
+        );
+        setEventsReady(true);
+      })
+      .catch(() => {
+        if (disposed) return;
+        if (fallbackEvents.length) {
+          setEvents(fallbackEvents);
+          setSelectedFingerprints(
+            new Set(fallbackEvents.map((event) => event.fingerprint)),
+          );
+          setEventsReady(true);
+          setStatus('最新错误读取失败，已使用打开通知时的快照');
+          return;
+        }
+        setEventsError(true);
+        setEventsReady(true);
+      });
     void readApplicationDiagnosticLogs()
       .then((nextLogs) => {
+        if (disposed) return;
         setLogs(nextLogs);
         setLogsReady(true);
       })
       .catch(() => {
+        if (disposed) return;
         setLogs([]);
         setLogsError(true);
         setLogsReady(true);
       });
-  }, [events, open]);
+    return () => {
+      disposed = true;
+    };
+  }, [fallbackEvents, open]);
 
   const submit = useCallback(async () => {
     const selectedEvents = events.filter((event) =>
       selectedFingerprints.has(event.fingerprint),
     );
-    if (!selectedEvents.length || busy || !logsReady) return;
+    if (!selectedEvents.length || busy || !eventsReady || !logsReady) return;
     if (includeLogs && logsError) return;
     setBusy(true);
     setStatus('正在提交…');
@@ -92,6 +128,7 @@ export function ErrorReportDialog({
   }, [
     busy,
     description,
+    eventsReady,
     events,
     includeLogs,
     logs,
@@ -124,7 +161,11 @@ export function ErrorReportDialog({
       <div className="my-5 grid gap-4">
         <section>
           <strong>错误事件（{events.length}）</strong>
-          {events.length ? (
+          {!eventsReady && <p>正在读取当前错误…</p>}
+          {eventsReady && eventsError && (
+            <p role="alert">错误事件暂不可用，请关闭后重试。</p>
+          )}
+          {eventsReady && !eventsError && events.length > 0 && (
             <ul className="m-0 mt-2 grid list-none gap-2 p-0">
               {events.map((event) => (
                 <li
@@ -154,7 +195,8 @@ export function ErrorReportDialog({
                 </li>
               ))}
             </ul>
-          ) : (
+          )}
+          {eventsReady && !eventsError && !events.length && (
             <p>当前没有待报告的错误。</p>
           )}
         </section>
@@ -191,11 +233,12 @@ export function ErrorReportDialog({
           取消
         </button>
         <button
-          className="cursor-pointer rounded-[9px] border-0 bg-[var(--platform-button-primary-fill)] px-3.5 py-[9px] text-[var(--platform-button-primary-text)]"
+          className="cursor-pointer rounded-[9px] border border-(--platform-button-primary-border) bg-(image:--platform-button-primary-fill) px-3.5 py-[9px] text-(--platform-button-primary-text)"
           type="button"
           onClick={() => void submit()}
           disabled={
             busy ||
+            !eventsReady ||
             !selectedFingerprints.size ||
             !logsReady ||
             (includeLogs && logsError)
diff --git a/apps/ai-game-creator-shell/src/components/error-report/ErrorReportNotice.tsx b/apps/ai-game-creator-shell/src/components/error-report/ErrorReportNotice.tsx
index fe0c6abdc..676cece87 100644
--- a/apps/ai-game-creator-shell/src/components/error-report/ErrorReportNotice.tsx
+++ b/apps/ai-game-creator-shell/src/components/error-report/ErrorReportNotice.tsx
@@ -12,7 +12,10 @@ export function ErrorReportNotice() {
   const [notificationEvents, setNotificationEvents] = useState<
     ClientErrorEvent[]
   >([]);
-  const [reportEvents, setReportEvents] = useState<ClientErrorEvent[]>([]);
+  const [reportFallbackEvents, setReportFallbackEvents] = useState<
+    ClientErrorEvent[]
+  >([]);
+  const [reportOpen, setReportOpen] = useState(false);
 
   const requestId = useRef(0);
   const retryTimer = useRef<number | null>(null);
@@ -65,31 +68,37 @@ export function ErrorReportNotice() {
   }, [loadEvents]);
 
   const openReport = () => {
-    setReportEvents(notificationEvents);
+    setReportFallbackEvents(notificationEvents);
+    setReportOpen(true);
     setNotificationEvents([]);
   };
 
+  const closeReport = () => {
+    setReportOpen(false);
+    setReportFallbackEvents([]);
+  };
+
   return (
     <>
       {notificationEvents.length ? (
         <aside
-          className="fixed top-[calc(var(--window-chrome-height)+14px)] right-4 z-40 flex max-w-[min(420px,calc(100vw-2rem))] items-center gap-2.5 rounded-xl border border-[var(--platform-surface-border)] bg-[var(--platform-subpanel-fill)] px-3.5 py-3 text-[var(--platform-text-strong)] shadow-[0_12px_30px_rgb(36_20_12_/_18%)] max-[560px]:top-[calc(var(--window-chrome-height)+8px)] max-[560px]:right-2 max-[560px]:left-2 max-[560px]:max-w-none"
+          className="fixed top-[calc(var(--window-chrome-height)+12px)] right-4 z-40 flex max-w-[min(520px,calc(100vw-2rem))] items-center gap-4 rounded-xl border border-[#efc9ae] bg-[#fffaf5] px-3.5 py-3 shadow-[0_8px_24px_rgb(100_49_26_/_16%)]"
           role="status"
           aria-live="polite"
         >
-          <span className="flex-[1_1_auto]">
-            发现 {notificationEvents.length} 个问题
-          </span>
+          <div className="grid min-w-0 gap-[3px]">
+            <strong className="text-[13px] text-[#4a220f]">发现问题</strong>
+          </div>
           <button
-            className="min-h-9 cursor-pointer rounded-lg border-0 bg-[var(--platform-button-primary-fill)] px-2.5 text-[var(--platform-button-primary-text)] last:w-9 last:bg-transparent last:px-0 last:text-xl last:text-[var(--platform-text-soft)]"
+            className="flex-[0_0_auto] cursor-pointer rounded-lg border-0 bg-[#c7653d] px-3 py-[7px] text-[12px] font-bold text-white disabled:cursor-wait disabled:opacity-[0.65]"
             type="button"
             onClick={openReport}
           >
             查看并报告
           </button>
           <button
-            className="min-h-9 cursor-pointer rounded-lg border-0 bg-[var(--platform-button-primary-fill)] px-2.5 text-[var(--platform-button-primary-text)] last:w-9 last:bg-transparent last:px-0 last:text-xl last:text-[var(--platform-text-soft)]"
             type="button"
+            className="inline-flex h-7 w-7 flex-[0_0_auto] cursor-pointer items-center justify-center rounded-md border-0 bg-transparent p-0 text-[#8d6a58] hover:bg-[rgb(199_101_61_/_12%)] hover:text-[#4a220f] disabled:cursor-wait disabled:opacity-50"
             onClick={() => {
               const dismissed = notificationEvents;
               setNotificationEvents([]);
@@ -102,9 +111,9 @@ export function ErrorReportNotice() {
         </aside>
       ) : null}
       <ErrorReportDialog
-        open={reportEvents.length > 0}
-        events={reportEvents}
-        onClose={() => setReportEvents([])}
+        open={reportOpen}
+        fallbackEvents={reportFallbackEvents}
+        onClose={closeReport}
       />
     </>
   );
diff --git a/apps/ai-game-creator-shell/src/features/agent-runtime/model.ts b/apps/ai-game-creator-shell/src/features/agent-runtime/model.ts
index e7dbcb0ea..d8df6bc98 100644
--- a/apps/ai-game-creator-shell/src/features/agent-runtime/model.ts
+++ b/apps/ai-game-creator-shell/src/features/agent-runtime/model.ts
@@ -1951,6 +1951,7 @@ export function projectRuntimeVisibleError(
       'session-budget-exceeded': '本次会话预算已耗尽，请缩小任务范围或新建任务',
       'usage-limit-exceeded': '智能创作用量已达上限，请检查账户额度后重试',
       unauthorized: '智能服务鉴权失败，请重新登录后重试',
+      'request-too-large': '模型请求体过大，请减少参考图或上下文后重试',
       'bad-request': '智能创作请求无效，请稍后重试',
       'cyber-policy': '智能创作安全策略拒绝了本次请求，请调整任务内容',
       'sandbox-error': '智能创作隔离环境启动失败，请重试或检查本机环境',
@@ -1972,6 +1973,7 @@ export function projectRuntimeVisibleError(
       'session-budget-exceeded': '本次会话预算已耗尽，请缩小任务范围或新建任务',
       'usage-limit-exceeded': '用量已达上限，请检查账户额度后重试',
       unauthorized: '鉴权失败，请重新登录后重试',
+      'request-too-large': '模型请求体过大，请减少参考图或上下文后重试',
       'bad-request': '请求无效，请稍后重试',
       'cyber-policy': '安全策略拒绝了本次请求，请调整任务内容',
       'sandbox-error': '工作区隔离启动失败，请检查项目目录后重试',
diff --git a/apps/ai-game-creator-shell/tests/ErrorReportDialog.test.tsx b/apps/ai-game-creator-shell/tests/ErrorReportDialog.test.tsx
new file mode 100644
index 000000000..cf8e05694
--- /dev/null
+++ b/apps/ai-game-creator-shell/tests/ErrorReportDialog.test.tsx
@@ -0,0 +1,81 @@
+/** @vitest-environment jsdom */
+
+import { cleanup, render, screen } from '@testing-library/react';
+import type { ReactNode } from 'react';
+import { afterEach, describe, expect, it, vi } from 'vitest';
+
+const mockState = vi.hoisted(() => ({
+  getPending: vi.fn(),
+  readLogs: vi.fn(),
+}));
+
+vi.mock('../src/services/errorReporting', () => ({
+  ackClientErrorEventsWithRetry: vi.fn(),
+  getPendingClientErrorEvents: mockState.getPending,
+  getStableErrorReportSubmissionId: vi.fn(),
+  readApplicationDiagnosticLogs: mockState.readLogs,
+  submitErrorReportBatch: vi.fn(),
+}));
+
+vi.mock('../src/components/modal/ThemedModal', () => ({
+  ThemedModal: ({ open, children }: { open: boolean; children: ReactNode }) =>
+    open ? <div role="dialog">{children}</div> : null,
+}));
+
+import { ErrorReportDialog } from '../src/components/error-report/ErrorReportDialog';
+
+const event = {
+  eventId: 'rust-error-1',
+  fingerprint: 'fingerprint-1',
+  source: 'test',
+  message: '打开面板时读取的错误',
+  occurredAt: '1',
+  count: 1,
+};
+
+describe('ErrorReportDialog', () => {
+  afterEach(() => {
+    cleanup();
+    mockState.getPending.mockReset();
+    mockState.readLogs.mockReset();
+  });
+
+  it('只在面板打开时读取最新错误快照', async () => {
+    mockState.getPending.mockResolvedValue([event]);
+    mockState.readLogs.mockResolvedValue([]);
+
+    const view = render(<ErrorReportDialog open={false} onClose={vi.fn()} />);
+    expect(mockState.getPending).not.toHaveBeenCalled();
+
+    view.rerender(<ErrorReportDialog open onClose={vi.fn()} />);
+
+    expect(await screen.findByText(event.message)).toBeTruthy();
+    expect(mockState.getPending).toHaveBeenCalledTimes(1);
+  });
+
+  it('读取错误事件失败时显示不可用状态而不是空列表', async () => {
+    mockState.getPending.mockRejectedValue(new Error('读取失败'));
+    mockState.readLogs.mockResolvedValue([]);
+
+    render(<ErrorReportDialog open onClose={vi.fn()} />);
+
+    expect(
+      await screen.findByText('错误事件暂不可用，请关闭后重试。'),
+    ).toBeTruthy();
+    expect(screen.queryByText('当前没有待报告的错误。')).toBeNull();
+  });
+
+  it('最新快照读取失败时使用打开通知时的事件快照', async () => {
+    mockState.getPending.mockRejectedValue(new Error('瞬时读取失败'));
+    mockState.readLogs.mockResolvedValue([]);
+
+    render(
+      <ErrorReportDialog open fallbackEvents={[event]} onClose={vi.fn()} />,
+    );
+
+    expect(await screen.findByText(event.message)).toBeTruthy();
+    expect(
+      screen.getByText('最新错误读取失败，已使用打开通知时的快照'),
+    ).toBeTruthy();
+  });
+});
diff --git a/apps/ai-game-creator-shell/tests/ErrorReportNotice.test.tsx b/apps/ai-game-creator-shell/tests/ErrorReportNotice.test.tsx
index 37e80b642..1fbe7b85d 100644
--- a/apps/ai-game-creator-shell/tests/ErrorReportNotice.test.tsx
+++ b/apps/ai-game-creator-shell/tests/ErrorReportNotice.test.tsx
@@ -1,6 +1,12 @@
 /** @vitest-environment jsdom */
 
-import { cleanup, render, screen, waitFor } from '@testing-library/react';
+import {
+  cleanup,
+  fireEvent,
+  render,
+  screen,
+  waitFor,
+} from '@testing-library/react';
 import { afterEach, describe, expect, it, vi } from 'vitest';
 
 const mockState = vi.hoisted(() => ({
@@ -8,6 +14,10 @@ const mockState = vi.hoisted(() => ({
   listeners: [] as Array<() => void>,
 }));
 
+const dialogState = vi.hoisted(() => ({
+  fallbackEvents: [] as (typeof event)[],
+}));
+
 vi.mock('../src/services/errorReporting', () => ({
   getPendingClientErrorEvents: mockState.getPending,
   subscribeClientErrorEvents: (listener: () => void) => {
@@ -21,7 +31,16 @@ vi.mock('../src/services/errorReporting', () => ({
 }));
 
 vi.mock('../src/components/error-report/ErrorReportDialog', () => ({
-  ErrorReportDialog: () => null,
+  ErrorReportDialog: ({
+    fallbackEvents,
+    open,
+  }: {
+    fallbackEvents?: (typeof event)[];
+    open: boolean;
+  }) => {
+    dialogState.fallbackEvents = fallbackEvents ?? [];
+    return open ? <div data-testid="error-report-dialog" /> : null;
+  },
 }));
 
 import { ErrorReportNotice } from '../src/components/error-report/ErrorReportNotice';
@@ -47,7 +66,7 @@ describe('ErrorReportNotice', () => {
 
     render(<ErrorReportNotice />);
 
-    expect(await screen.findByText('发现 1 个问题')).toBeTruthy();
+    expect(await screen.findByText('发现问题')).toBeTruthy();
     expect(mockState.getPending).toHaveBeenCalledTimes(1);
   });
 
@@ -61,7 +80,19 @@ describe('ErrorReportNotice', () => {
 
     mockState.listeners[0]?.();
 
-    expect(await screen.findByText('发现 1 个问题')).toBeTruthy();
+    expect(await screen.findByText('发现问题')).toBeTruthy();
     expect(mockState.getPending).toHaveBeenCalledTimes(2);
   });
+
+  it('打开报告时保留通知快照作为对话框 fallback', async () => {
+    mockState.getPending.mockResolvedValue([event]);
+
+    render(<ErrorReportNotice />);
+    await screen.findByText('发现问题');
+
+    fireEvent.click(screen.getByRole('button', { name: '查看并报告' }));
+
+    expect(await screen.findByTestId('error-report-dialog')).toBeTruthy();
+    expect(dialogState.fallbackEvents).toEqual([event]);
+  });
 });
diff --git a/apps/ai-game-creator-shell/tests/agentRuntimeModel.test.ts b/apps/ai-game-creator-shell/tests/agentRuntimeModel.test.ts
index e40690510..6772d6555 100644
--- a/apps/ai-game-creator-shell/tests/agentRuntimeModel.test.ts
+++ b/apps/ai-game-creator-shell/tests/agentRuntimeModel.test.ts
@@ -695,6 +695,13 @@ describe('Agent Runtime Provider 状态投影', () => {
         true,
       ),
     ).toBe('陶泥儿智能创作 用量已达上限，请检查账户额度后重试');
+    expect(
+      projectRuntimeVisibleError(
+        'codex-app-server-error:request-too-large',
+        '陶泥儿智能创作',
+        true,
+      ),
+    ).toBe('陶泥儿智能创作 模型请求体过大，请减少参考图或上下文后重试');
     expect(
       projectRuntimeVisibleError(
         'codex-app-server-terminal-unknown: 等待 turn/completed 超时',
diff --git a/docs/technical/【技术方案】AGC错误报告与诊断上传-2026-08-31.md b/docs/technical/【技术方案】AGC错误报告与诊断上传-2026-08-31.md
index 31b747b01..1b68df9fe 100644
--- a/docs/technical/【技术方案】AGC错误报告与诊断上传-2026-08-31.md
+++ b/docs/technical/【技术方案】AGC错误报告与诊断上传-2026-08-31.md
@@ -11,9 +11,11 @@ AI Game Creator Shell 采用 IDEA 风格的当前进程错误报告：错误事
 - 指纹计算可使用调用方的 page/action 及脱敏后的首个调用点作为进程内区分输入，但这些上下文不会作为事件字段上传；消息与 stack 在入池前统一脱敏，WebCrypto 失败时降级为稳定可读指纹，采集本身不得产生新的未处理拒绝。
 - 客户端 API 自动采集只覆盖网络错误、408 和 5xx；预期的 4xx 登录/鉴权失败不进入错误报告池。
 - Rust 侧通过 `app_log!` 将普通文本日志同时输出到 stderr 和 AppData `diagnostics/application.log`，超出 256 KiB 滚动到 `application.previous.log`；WebView 的 console 输出通过 `append_application_log` 镜像到同一 raw log，并在客户端桥接处再次脱敏；`read_diagnostic_logs` 只读取应用级日志。
-- 报告面板只由自动诊断通知中的“查看并报告”打开，不提供聊天命令、崩溃页按钮或其他手动入口；默认选中最新事件，其他事件可勾选。允许填写最多 2,000 字中文描述并取消日志附件；本版本不支持截图或任意文件附件。
+- 报告面板只由自动诊断通知中的“查看并报告”打开，不提供聊天命令、崩溃页按钮或其他手动入口；默认选中当前快照中的全部事件，用户可取消不想提交的事件。允许填写最多 2,000 字中文描述并取消日志附件；本版本不支持截图或任意文件附件。
+- 报告面板读取当前错误快照失败时，必须明确显示“错误事件暂不可用，请关闭后重试”，不能把失败误显示为“当前没有待报告的错误”。
+- 通知中的“查看并报告”打开面板时必须保留该次通知快照；最新快照读取瞬时失败时使用这份 fallback 继续展示和提交，不能因先清空通知而丢失用户刚看到的事件。
 - Rust 是结构化错误队列的唯一真相源：`src-tauri/src/error_report/` 负责脱敏、调用点指纹、eventId、计数、100 条上限、5 秒聚合和 ack 生命周期；WebView 仅通过 Tauri bridge 上报、读取快照并保存短暂 React 展示状态，不维护第二份事件 Map。Runtime 错误上报统一使用 `source=agent-runtime`、`action=agent-runtime` 和 Agent ID 作为 page；包含 `kind=codex-app-server-*` 或 `codex-app-server-error:*` 的消息在入池前归一为稳定类别（例如 `codex-app-server-error:other`），不把 public summary 中的动态 fingerprint/长度作为分桶输入。Rust emit 只作为无状态唤醒，携带单调递增的 generation，不携带错误正文或事件 ID。
-- 错误事件先在当前进程内存池按 fingerprint 合并，经过 5 秒聚合后只发出一次非阻塞存在性唤醒；WebView 挂载、收到唤醒、重新获得焦点或恢复可见时都查询完整未 ack 快照，并在桥接暂时失败时做有限退避重试。通知支持“查看并报告”和“忽略”，同一 fingerprint 仅在新增时唤醒一次。通知不直接打开阻塞式报告面板。忽略只关闭当前 UI，不删除事件；提交成功后由 bridge ack/delete 选中事件。
+- 错误事件先在当前进程内存池按 fingerprint 合并，经过 5 秒聚合后只发出一次非阻塞存在性唤醒；WebView 挂载、收到唤醒、重新获得焦点或恢复可见时都查询完整未 ack 快照，并在桥接暂时失败时做有限退避重试。通知支持“查看并报告”和“忽略”，同一 fingerprint 仅在新增时唤醒一次。通知不直接打开阻塞式报告面板；用户打开报告面板后，面板再读取一次完整未 ack 快照，确保提交使用打开时的最新事件。忽略只关闭当前 UI，不删除事件；提交成功后由 bridge ack/delete 选中事件。
 - 上传失败只在当前进程显示失败并允许用户再次提交，不跨重启恢复事件池，不后台自动重试。
 
 ## HTTP 与存储
diff --git a/docs/technical/【技术方案】AI游戏创作智能体App实施计划-2026-06-24.md b/docs/technical/【技术方案】AI游戏创作智能体App实施计划-2026-06-24.md
index 1da11208d..206e150c6 100644
--- a/docs/technical/【技术方案】AI游戏创作智能体App实施计划-2026-06-24.md
+++ b/docs/technical/【技术方案】AI游戏创作智能体App实施计划-2026-06-24.md
@@ -1282,3 +1282,8 @@ DirectProject 使用 `approvalPolicy=never`，避免每次原生调用再经过
 - 配置文件新增 `schemaVersion: \"game-creator-config.v2\"`。新默认配置开启 `stream` 与受控联网；无版本旧配置在启动时补写 v2，旧 `codex_app_server` 路由仅在省略 `webSearchEnabled` 时按历史默认补为开启，显式 `false` 保留；Provider / Anthropic 路由未提供搜索覆盖时保持关闭，避免继承 DirectProject 默认。主配置按完整配置迁移；本地覆盖只补 schema 版本，不凭不完整 overlay 推断或写入 `agentMode` / 搜索布尔值。
 - `/llm-status`、开发单 Agent 状态和项目 Agent 状态卡对 Codex 模式显示“流式开启 / 关闭”“受控联网开启 / 关闭”“Codex 原生 web_search 关闭”，不显示 API Key、URL、请求头、绝对路径或 Provider 原始错误正文。
 - BDD 验收场景与测试映射：DirectProject 默认工具目录包含 `agc_web_search` 且原生搜索仍 disabled；未审核字段、越界数量和非公开 URL 在桥接端失败关闭；旧无版本配置迁移为 v2 且按路由得到正确默认；状态卡显示三态安全摘要。对应 Rust `configuration`、`direct_tools_mcp`、`direct_tool_bridge`、`codex_app_server` 定向测试及前端状态格式化 / AppSurface 测试。
+
+## 2026-09-06 AGC LLM 代理请求体合同
+
+- `/api/llm/responses` 与 `/api/llm/chat/completions` 的正式请求体上限为 `32 MiB`。两个路由必须显式配置 Axum `DefaultBodyLimit::max(LLM_REQUEST_MAX_BODY_BYTES)`；不能依赖 handler 内的 `Bytes / Json` 后置检查，否则 Axum 默认 `2 MiB` 会先拒绝 Direct Codex 携带图片工具结果的大上下文请求。超过 `32 MiB` 仍返回 `413 PAYLOAD_TOO_LARGE`。
+- Codex app-server 的 failed turn 需要把上游 / 连接层 HTTP 413、`PAYLOAD_TOO_LARGE` 和 provider proxy 的 `provider request too large` 映射为稳定分类 `codex-app-server-error:request-too-large`；用户可见文案固定为“模型请求体过大，请减少参考图或上下文后重试”，不得落入 `other` 或泛化成权限 / 安全策略错误。
diff --git a/server-rs/crates/api-server/src/llm/mod.rs b/server-rs/crates/api-server/src/llm/mod.rs
index 6170d04ad..e9b526f2a 100644
--- a/server-rs/crates/api-server/src/llm/mod.rs
+++ b/server-rs/crates/api-server/src/llm/mod.rs
@@ -28,6 +28,8 @@ use crate::{
     platform_errors::map_llm_error, request_context::RequestContext, state::AppState,
 };
 
+pub(crate) const LLM_REQUEST_MAX_BODY_BYTES: usize = 32 * 1024 * 1024;
+
 pub(crate) mod icon_specs;
 
 #[cfg(test)]
@@ -222,8 +224,7 @@ pub async fn proxy_llm_responses(
     headers: HeaderMap,
     body: Bytes,
 ) -> Result<Response, Response> {
-    const MAX_REQUEST_BYTES: usize = 32 * 1024 * 1024;
-    if body.len() > MAX_REQUEST_BYTES {
+    if body.len() > LLM_REQUEST_MAX_BODY_BYTES {
         return Err(llm_error_response(
             &request_context,
             AppError::from_status(StatusCode::PAYLOAD_TOO_LARGE)
@@ -1187,6 +1188,77 @@ mod tests {
         );
     }
 
+    #[tokio::test]
+    async fn llm_routes_accept_large_context_bodies_beyond_axum_default() {
+        let large_input = "x".repeat(2 * 1024 * 1024 + 1024);
+        let (state, user_id) = seed_authenticated_state(AppConfig::default()).await;
+        install_test_provisioned_router_credential(
+            &user_id,
+            "http://127.0.0.1:1".to_string(),
+            "fixture-key",
+        );
+        let token = issue_access_token(&state, &user_id);
+        let app = build_router(state);
+
+        let response = app
+            .clone()
+            .oneshot(
+                Request::builder()
+                    .method("POST")
+                    .uri("/api/llm/responses")
+                    .header("authorization", format!("Bearer {token}"))
+                    .header("content-type", "application/json")
+                    .body(Body::from(json!({ "input": large_input }).to_string()))
+                    .expect("request should build"),
+            )
+            .await
+            .expect("response should not hit the default body limit");
+        assert_ne!(response.status(), StatusCode::PAYLOAD_TOO_LARGE);
+
+        let response = app
+            .oneshot(
+                Request::builder()
+                    .method("POST")
+                    .uri("/api/llm/chat/completions")
+                    .header("authorization", format!("Bearer {token}"))
+                    .header("content-type", "application/json")
+                    .body(Body::from(
+                        json!({
+                            "messages": [
+                                { "role": "user", "content": large_input }
+                            ]
+                        })
+                        .to_string(),
+                    ))
+                    .expect("request should build"),
+            )
+            .await
+            .expect("response should not hit the default body limit");
+        assert_ne!(response.status(), StatusCode::PAYLOAD_TOO_LARGE);
+    }
+
+    #[tokio::test]
+    async fn llm_responses_rejects_bodies_above_explicit_limit() {
+        let (state, user_id) = seed_authenticated_state(AppConfig::default()).await;
+        let token = issue_access_token(&state, &user_id);
+        let app = build_router(state);
+
+        let response = app
+            .oneshot(
+                Request::builder()
+                    .method("POST")
+                    .uri("/api/llm/responses")
+                    .header("authorization", format!("Bearer {token}"))
+                    .header("content-type", "application/json")
+                    .body(Body::from(vec![b'x'; LLM_REQUEST_MAX_BODY_BYTES + 1]))
+                    .expect("request should build"),
+            )
+            .await
+            .expect("oversized response should be returned");
+
+        assert_eq!(response.status(), StatusCode::PAYLOAD_TOO_LARGE);
+    }
+
     #[tokio::test]
     async fn llm_chat_completions_streams_sse_payload() {
         let server_url = spawn_mock_server(vec![MockResponse {
diff --git a/server-rs/crates/api-server/src/modules/platform.rs b/server-rs/crates/api-server/src/modules/platform.rs
index 43492f64c..d457b795e 100644
--- a/server-rs/crates/api-server/src/modules/platform.rs
+++ b/server-rs/crates/api-server/src/modules/platform.rs
@@ -1,11 +1,16 @@
 use axum::{
-    Router, middleware,
+    Router,
+    extract::DefaultBodyLimit,
+    middleware,
     routing::{get, post},
 };
 
 use crate::{
     auth::require_bearer_auth,
-    llm::{list_llm_models, proxy_llm_chat_completions, proxy_llm_responses},
+    llm::{
+        LLM_REQUEST_MAX_BODY_BYTES, list_llm_models, proxy_llm_chat_completions,
+        proxy_llm_responses,
+    },
     state::AppState,
     volcengine_speech::{
         get_volcengine_speech_config, stream_volcengine_asr, stream_volcengine_tts_bidirection,
@@ -24,17 +29,21 @@ pub fn router(state: AppState) -> Router<AppState> {
         )
         .route(
             "/api/llm/chat/completions",
-            post(proxy_llm_chat_completions).route_layer(middleware::from_fn_with_state(
-                state.clone(),
-                require_bearer_auth,
-            )),
+            post(proxy_llm_chat_completions)
+                .route_layer(middleware::from_fn_with_state(
+                    state.clone(),
+                    require_bearer_auth,
+                ))
+                .layer(DefaultBodyLimit::max(LLM_REQUEST_MAX_BODY_BYTES)),
         )
         .route(
             "/api/llm/responses",
-            post(proxy_llm_responses).route_layer(middleware::from_fn_with_state(
-                state.clone(),
-                require_bearer_auth,
-            )),
+            post(proxy_llm_responses)
+                .route_layer(middleware::from_fn_with_state(
+                    state.clone(),
+                    require_bearer_auth,
+                ))
+                .layer(DefaultBodyLimit::max(LLM_REQUEST_MAX_BODY_BYTES)),
         )
         .route(
             "/api/speech/volcengine/config",