diff --git a/servers/tools-pve/litellm/README.md b/servers/tools-pve/litellm/README.md
index 434f402..7568830 100644
--- a/servers/tools-pve/litellm/README.md
+++ b/servers/tools-pve/litellm/README.md
@@ -41,6 +41,21 @@ GPT路线对应备用模型，不开放图像、语音等无关能力。Claude
 依据：[OpenAI赠金说明](https://developers.openai.com/api/docs/guides/chatgpt-api-credits)、
 [LiteLLM回退](https://docs.litellm.ai/docs/proxy/reliability)。
 
+本轮验收：18项配置测试通过；官方Luna/Sol/Terra的Responses、Luna Chat、
+Codex Luna Responses完整SSE通过（正常请求fallbacks=0）；embedding small、
+TTS与合成语音的gpt-transcribe/mini-transcribe通过。图像未实际生成，
+diarize与embedding large只配置且模型目录可见，不能据此声称完成任务验收。
+`verify_openai_fallback.py`在独立容器exec进程中对Chat与Responses各注入
+429/401/503，六例均收到真实官方API的短回复；不是人为耗尽订阅，也不修改
+生产worker的函数或真实OAuth token。复测命令（会有少量API用量）：
+
+```bash
+ssh tools@192.168.50.49 'sudo -n docker exec -i tools-litellm python -' < verify_openai_fallback.py
+```
+
+Arcane Sync及Up终态success；PostgreSQL启动时间仍是
+`2026-10-12T05:46:12.472887407Z`，数据库及OAuth卷未重建。
+
 ## 部署状态
 
 2026-10-09：已通过 Arcane 上线，LiteLLM 1.104.2 与 PostgreSQL 均 healthy。
diff --git a/servers/tools-pve/litellm/verify_openai_fallback.py b/servers/tools-pve/litellm/verify_openai_fallback.py
new file mode 100644
index 0000000..179ac32
--- /dev/null
+++ b/servers/tools-pve/litellm/verify_openai_fallback.py
@@ -0,0 +1,69 @@
+#!/usr/bin/env python3
+"""Run inside a separate LiteLLM container exec: fake OAuth failures, real API backup."""
+import asyncio
+from copy import deepcopy
+from functools import wraps
+import json
+import os
+from pathlib import Path
+from unittest.mock import patch
+
+import litellm
+import yaml
+
+litellm.suppress_debug_info = True
+
+
+async def main():
+    config = yaml.safe_load(Path('/tmp/litellm.yaml').read_text())
+    primary, backup = 'codex/gpt-luna-latest', 'openai/gpt-luna-latest'
+    routes = [deepcopy(r) for r in config['model_list'] if r['model_name'] in (primary, backup)]
+    assert len(routes) == 2
+    assert {primary: [backup]} in config['router_settings']['fallbacks']
+    for route in routes:
+        if route['model_name'] == backup:
+            route['litellm_params']['api_key'] = os.environ['OPENAI_API_KEY']
+    actual_chat, actual_responses = litellm.acompletion, litellm.aresponses
+    for protocol in ('chat', 'responses'):
+        for error_type, expected in ((litellm.RateLimitError, 429),
+                                     (litellm.AuthenticationError, 401),
+                                     (litellm.ServiceUnavailableError, 503)):
+            calls = []
+
+            async def invoke(real, *args, **kwargs):
+                model = kwargs.get('model', '')
+                if model.startswith('chatgpt/'):
+                    calls.append('subscription-rejected')
+                    raise error_type(message='Synthetic OAuth failure; isolated test only',
+                                     llm_provider='chatgpt', model=model)
+                assert model.startswith('openai/')
+                calls.append('official-api')
+                return await real(*args, **kwargs)
+
+            @wraps(actual_chat)
+            async def chat(*args, **kwargs):
+                return await invoke(actual_chat, *args, **kwargs)
+
+            @wraps(actual_responses)
+            async def responses(*args, **kwargs):
+                return await invoke(actual_responses, *args, **kwargs)
+
+            with patch.object(litellm, 'acompletion', chat), patch.object(litellm, 'aresponses', responses):
+                router = litellm.Router(model_list=deepcopy(routes), fallbacks=[{primary: [backup]}],
+                                        num_retries=0, timeout=60)
+                if protocol == 'chat':
+                    result = await router.acompletion(model=primary, messages=[
+                        {'role': 'user', 'content': 'Reply only OK. Synthetic test.'}], max_tokens=32)
+                    assert result.choices and result.choices[0].message.content
+                else:
+                    result = await router.aresponses(model=primary, input=[
+                        {'role': 'user', 'content': 'Reply only OK. Synthetic test.'}],
+                        max_output_tokens=32, store=False)
+                    assert result.status == 'completed'
+                assert calls[0] == 'subscription-rejected' and calls[-1] == 'official-api', calls
+                print(json.dumps({'protocol': protocol, 'injected_error': expected,
+                                  'calls': calls, 'backup': backup, 'passed': True}), flush=True)
+
+
+if __name__ == '__main__':
+    asyncio.run(main())