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[Bug] Windows hooks corrupt UTF-8 prompts and crash validation error handling #1305

Closed
#1326
Closed
[Bug] Windows hooks corrupt UTF-8 prompts and crash validation error handling#1305
#1326

Description

@Alanxtl
Alanxtl
opened on Aug 21, 2026

Bug description

On Windows, the Codex/Claude Code prompt hook corrupts non-ASCII prompts before sending them to the PowerContext Server. Chinese prompts arrive as mojibake and contain lone surrogate characters such as \\udcaa.

The Server then rejects the request with a Pydantic string_unicode validation error. While constructing the 422 response, the validation handler includes the raw input value in error.errors(); Starlette's JSONResponse cannot UTF-8 encode the lone surrogate and raises a second exception.

fastapi.exceptions.RequestValidationError:
  type: string_unicode
  loc: ('body', 'query')
  msg: Input should be a valid string, unable to parse raw data as a unicode string

UnicodeEncodeError: 'utf-8' codec can't encode character '\\udcaa':
surrogates not allowed
detailed log

2026-08-21T15:10:03+0800 INFO uvicorn.error Started server process [11524]
2026-08-21T15:10:03+0800 INFO uvicorn.error Waiting for application startup.
2026-08-21T15:10:03+0800 INFO powercontext.server.factory PowerContext Server is starting
2026-08-21T15:10:03+0800 INFO powercontext.server.factory PowerContext Server is ready
2026-08-21T15:10:03+0800 INFO uvicorn.error Application startup complete.
2026-08-21T15:10:03+0800 INFO uvicorn.error Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
2026-08-21T15:11:49+0800 ERROR uvicorn.error Exception in ASGI application
Traceback (most recent call last):
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette_exception_handler.py", line 42, in wrapped_app
await app(scope, receive, sender)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 137, in app
response = await f(request)
^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 740, in app
raise validation_error
fastapi.exceptions.RequestValidationError: 1 validation error:
{'type': 'string_unicode', 'loc': ('body', 'query'), 'msg': 'Input should be a valid string, unable to parse raw data as a unicode string', 'input': '浣跨敤powercontext鐪嬬幇鍦ㄦ湁鍝\udcaa浜涜\udcae板繂銆\udc91'}

File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\app.py", line 1006, in prepare_context
POST /v1/context/prepare

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\uvicorn\protocols\http\h11_impl.py", line 416, in run_asgi
result = await app( # type: ignore[func-returns-value]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
self.scope, self.receive, self.send
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
)
^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\uvicorn\middleware\proxy_headers.py", line 63, in call
return await self.app(scope, receive, send)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\applications.py", line 1163, in call
await super().call(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\applications.py", line 90, in call
await self.middleware_stack(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\errors.py", line 186, in call
raise exc
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\errors.py", line 164, in call
await self.app(scope, receive, _send)
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\tracing.py", line 279, in call
await self.app(scope, receive, send_with_status)
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\access.py", line 64, in call
await self.app(scope, receive, send_with_access_log)
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\metrics.py", line 150, in call
await self.app(scope, receive, send_with_metrics)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\base.py", line 193, in call
response = await self.dispatch_func(request, call_next)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\app.py", line 597, in attach_request_id
response = await call_next(request)
^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\base.py", line 168, in call_next
raise app_exc from app_exc.cause or app_exc.context
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\base.py", line 144, in coro
await self.app(scope, receive_or_disconnect, send_no_error)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\exceptions.py", line 63, in call
await wrap_app_handling_exceptions(self.app, conn)(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette_exception_handler.py", line 53, in wrapped_app
raise exc
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette_exception_handler.py", line 42, in wrapped_app
await app(scope, receive, sender)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\middleware\asyncexitstack.py", line 18, in call
await self.app(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\routing.py", line 660, in call
await self.middleware_stack(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 2685, in app
await route.handle(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 1267, in handle
await super().handle(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\routing.py", line 276, in handle
await self.app(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 151, in app
await wrap_app_handling_exceptions(app, request)(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette_exception_handler.py", line 59, in wrapped_app
response = await handler(conn, exc) # type: ignore[arg-type]
^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\app.py", line 606, in invalid_request
return _error_response(
status.HTTP_422_UNPROCESSABLE_CONTENT,
...<2 lines>...
details={"errors": error.errors()},
)
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\app.py", line 1465, in _error_response
return JSONResponse(status_code=response_status, content=error.model_dump(mode="json"))
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\responses.py", line 192, in init
super().init(content, status_code, headers, media_type, background)
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\responses.py", line 45, in init
self.body = self.render(content)
~~~~~~~~~~~^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\responses.py", line 201, in render
).encode("utf-8")
~~~~~~^^^^^^^^^
UnicodeEncodeError: 'utf-8' codec can't encode character '\udcaa' in position 271: surrogates not allowed
2026-08-21T15:13:41+0800 INFO powercontext.server.access PowerContext transport request completed request_id=5dc6fdbe65f495fd trace_id=cdee98acf2ff53e73e09d6643b969871 span_id=5dc6fdbe65f495fd
2026-08-21T15:14:04+0800 INFO powercontext.server.access PowerContext transport request completed request_id=63ec0a98c150618d trace_id=c8bc26a115e9cbc217f1f640a0004dae span_id=63ec0a98c150618d
2026-08-21T15:15:05+0800 INFO powercontext.server.access PowerContext transport request completed request_id=cb3c4c9910c4fab0 trace_id=da9e93313fd16211259d47135de5f87b span_id=cb3c4c9910c4fab0
2026-08-21T15:15:05+0800 INFO powercontext.server.access PowerContext transport request completed request_id=ba3fe8573c23e9c4 trace_id=01a30b80190af0a41b55a41be143d1e1 span_id=ba3fe8573c23e9c4
2026-08-21T15:15:08+0800 ERROR uvicorn.error Exception in ASGI application
Traceback (most recent call last):
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette_exception_handler.py", line 42, in wrapped_app
await app(scope, receive, sender)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 137, in app
response = await f(request)
^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 740, in app
raise validation_error
fastapi.exceptions.RequestValidationError: 1 validation error:
{'type': 'string_unicode', 'loc': ('body', 'query'), 'msg': 'Input should be a valid string, unable to parse raw data as a unicode string', 'input': '鏌ョ湅褰撳墠鎵\udc80鏈夎\udcae板繂\n'}

File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\app.py", line 1006, in prepare_context
POST /v1/context/prepare

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\uvicorn\protocols\http\h11_impl.py", line 416, in run_asgi
result = await app( # type: ignore[func-returns-value]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
self.scope, self.receive, self.send
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
)
^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\uvicorn\middleware\proxy_headers.py", line 63, in call
return await self.app(scope, receive, send)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\applications.py", line 1163, in call
await super().call(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\applications.py", line 90, in call
await self.middleware_stack(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\errors.py", line 186, in call
raise exc
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\errors.py", line 164, in call
await self.app(scope, receive, _send)
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\tracing.py", line 279, in call
await self.app(scope, receive, send_with_status)
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\access.py", line 64, in call
await self.app(scope, receive, send_with_access_log)
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\metrics.py", line 150, in call
await self.app(scope, receive, send_with_metrics)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\base.py", line 193, in call
response = await self.dispatch_func(request, call_next)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\app.py", line 597, in attach_request_id
response = await call_next(request)
^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\base.py", line 168, in call_next
raise app_exc from app_exc.cause or app_exc.context
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\base.py", line 144, in coro
await self.app(scope, receive_or_disconnect, send_no_error)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\exceptions.py", line 63, in call
await wrap_app_handling_exceptions(self.app, conn)(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette_exception_handler.py", line 53, in wrapped_app
raise exc
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette_exception_handler.py", line 42, in wrapped_app
await app(scope, receive, sender)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\middleware\asyncexitstack.py", line 18, in call
await self.app(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\routing.py", line 660, in call
await self.middleware_stack(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 2685, in app
await route.handle(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 1267, in handle
await super().handle(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\routing.py", line 276, in handle
await self.app(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 151, in app
await wrap_app_handling_exceptions(app, request)(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette_exception_handler.py", line 59, in wrapped_app
response = await handler(conn, exc) # type: ignore[arg-type]
^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\app.py", line 606, in invalid_request
return _error_response(
status.HTTP_422_UNPROCESSABLE_CONTENT,
...<2 lines>...
details={"errors": error.errors()},
)
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\app.py", line 1465, in _error_response
return JSONResponse(status_code=response_status, content=error.model_dump(mode="json"))
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\responses.py", line 192, in init
super().init(content, status_code, headers, media_type, background)
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\responses.py", line 45, in init
self.body = self.render(content)
~~~~~~~~~~~^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\responses.py", line 201, in render
).encode("utf-8")
~~~~~~^^^^^^^^^
UnicodeEncodeError: 'utf-8' codec can't encode character '\udc80' in position 256: surrogates not allowed
2026-08-21T15:16:17+0800 INFO powercontext.server.access PowerContext transport request completed request_id=4d20a6597f1957a3 trace_id=ce89741dbae4cd832596b55889eb0f40 span_id=4d20a6597f1957a3
2026-08-21T15:16:17+0800 INFO powercontext.server.access PowerContext transport request completed request_id=98a7e391c2e7838c trace_id=2dbd9703f08a9154d3fe2b9d005258e0 span_id=98a7e391c2e7838c
2026-08-21T15:16:17+0800 ERROR uvicorn.error Exception in ASGI application
Traceback (most recent call last):
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette_exception_handler.py", line 42, in wrapped_app
await app(scope, receive, sender)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 137, in app
response = await f(request)
^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 740, in app
raise validation_error
fastapi.exceptions.RequestValidationError: 1 validation error:
{'type': 'string_unicode', 'loc': ('body', 'query'), 'msg': 'Input should be a valid string, unable to parse raw data as a unicode string', 'input': '@PowerContext 浣犳湁鍝\udcaa浜涜\udcae板繂\n'}

File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\app.py", line 1006, in prepare_context
POST /v1/context/prepare

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\uvicorn\protocols\http\h11_impl.py", line 416, in run_asgi
result = await app( # type: ignore[func-returns-value]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
self.scope, self.receive, self.send
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
)
^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\uvicorn\middleware\proxy_headers.py", line 63, in call
return await self.app(scope, receive, send)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\applications.py", line 1163, in call
await super().call(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\applications.py", line 90, in call
await self.middleware_stack(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\errors.py", line 186, in call
raise exc
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\errors.py", line 164, in call
await self.app(scope, receive, _send)
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\tracing.py", line 279, in call
await self.app(scope, receive, send_with_status)
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\access.py", line 64, in call
await self.app(scope, receive, send_with_access_log)
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\metrics.py", line 150, in call
await self.app(scope, receive, send_with_metrics)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\base.py", line 193, in call
response = await self.dispatch_func(request, call_next)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\app.py", line 597, in attach_request_id
response = await call_next(request)
^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\base.py", line 168, in call_next
raise app_exc from app_exc.cause or app_exc.context
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\base.py", line 144, in coro
await self.app(scope, receive_or_disconnect, send_no_error)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\exceptions.py", line 63, in call
await wrap_app_handling_exceptions(self.app, conn)(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette_exception_handler.py", line 53, in wrapped_app
raise exc
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette_exception_handler.py", line 42, in wrapped_app
await app(scope, receive, sender)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\middleware\asyncexitstack.py", line 18, in call
await self.app(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\routing.py", line 660, in call
await self.middleware_stack(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 2685, in app
await route.handle(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 1267, in handle
await super().handle(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\routing.py", line 276, in handle
await self.app(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 151, in app
await wrap_app_handling_exceptions(app, request)(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette_exception_handler.py", line 59, in wrapped_app
response = await handler(conn, exc) # type: ignore[arg-type]
^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\app.py", line 606, in invalid_request
return _error_response(
status.HTTP_422_UNPROCESSABLE_CONTENT,
...<2 lines>...
details={"errors": error.errors()},
)
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\app.py", line 1465, in _error_response
return JSONResponse(status_code=response_status, content=error.model_dump(mode="json"))
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\responses.py", line 192, in init
super().init(content, status_code, headers, media_type, background)
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\responses.py", line 45, in init
self.body = self.render(content)
~~~~~~~~~~~^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\responses.py", line 201, in render
).encode("utf-8")
~~~~~~^^^^^^^^^
UnicodeEncodeError: 'utf-8' codec can't encode character '\udcaa' in position 305: surrogates not allowed
2026-08-21T15:16:52+0800 INFO powercontext.server.access PowerContext transport request completed request_id=14b576a2e2022c16 trace_id=3dd5029492f8bf814422b968b65b2e02 span_id=14b576a2e2022c16
2026-08-21T15:16:53+0800 INFO powercontext.server.access PowerContext transport request completed request_id=530cd90e55aa8906 trace_id=71c1426fdd095544592377ad0759c6a4 span_id=530cd90e55aa8906
2026-08-21T15:17:30+0800 INFO powercontext.server.access PowerContext transport request completed request_id=fcd2d868e704e5f6 trace_id=ecaafdedfc49d47620c831fe895f7612 span_id=fcd2d868e704e5f6
2026-08-21T15:17:38+0800 INFO powercontext.server.access PowerContext transport request completed request_id=c6e65f89495c9664 trace_id=468ac7d867b1e4ebc5f18388a45c6546 span_id=c6e65f89495c9664
2026-08-21T15:18:04+0800 INFO powercontext.server.access PowerContext transport request completed request_id=16e8e56ab51a1eae trace_id=743ce4cedcaf2b0af7fd5eb20d24ea87 span_id=16e8e56ab51a1eae
2026-08-21T15:18:04+0800 INFO powercontext.server.access PowerContext transport request completed request_id=5ed085e47491e1b3 trace_id=c58e9f22edbf5a31c5ff197daf11ea70 span_id=5ed085e47491e1b3
2026-08-21T15:18:15+0800 INFO powercontext.server.access PowerContext transport request completed request_id=dea2ab5de8c546fd trace_id=b497efd3c19cb90fbb78247f2d9f0aaf span_id=dea2ab5de8c546fd
2026-08-21T15:18:32+0800 INFO powercontext.server.access PowerContext transport request completed request_id=e4bd263ce54d6e02 trace_id=bfb08e20ed9a48a4516285255867d0bc span_id=e4bd263ce54d6e02
2026-08-21T15:18:32+0800 INFO powercontext.server.access PowerContext transport request completed request_id=922dc05b605093f2 trace_id=00602cad1a01b152631724c89d8965a3 span_id=922dc05b605093f2
2026-08-21T15:18:38+0800 ERROR uvicorn.error Exception in ASGI application
Traceback (most recent call last):
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette_exception_handler.py", line 42, in wrapped_app
await app(scope, receive, sender)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 137, in app
response = await f(request)
^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 740, in app
raise validation_error
fastapi.exceptions.RequestValidationError: 1 validation error:
{'type': 'string_unicode', 'loc': ('body', 'query'), 'msg': 'Input should be a valid string, unable to parse raw data as a unicode string', 'input': '浣犺\udcae颁竴涓\udc8b 鎴戜娇鐢ㄧ殑python绠＄悊鍣ㄦ槸uv\n'}

File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\app.py", line 1006, in prepare_context
POST /v1/context/prepare

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\uvicorn\protocols\http\h11_impl.py", line 416, in run_asgi
result = await app( # type: ignore[func-returns-value]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
self.scope, self.receive, self.send
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
)
^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\uvicorn\middleware\proxy_headers.py", line 63, in call
return await self.app(scope, receive, send)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\applications.py", line 1163, in call
await super().call(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\applications.py", line 90, in call
await self.middleware_stack(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\errors.py", line 186, in call
raise exc
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\errors.py", line 164, in call
await self.app(scope, receive, _send)
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\tracing.py", line 279, in call
await self.app(scope, receive, send_with_status)
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\access.py", line 64, in call
await self.app(scope, receive, send_with_access_log)
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\metrics.py", line 150, in call
await self.app(scope, receive, send_with_metrics)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\base.py", line 193, in call
response = await self.dispatch_func(request, call_next)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\app.py", line 597, in attach_request_id
response = await call_next(request)
^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\base.py", line 168, in call_next
raise app_exc from app_exc.cause or app_exc.context
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\base.py", line 144, in coro
await self.app(scope, receive_or_disconnect, send_no_error)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\exceptions.py", line 63, in call
await wrap_app_handling_exceptions(self.app, conn)(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette_exception_handler.py", line 53, in wrapped_app
raise exc
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette_exception_handler.py", line 42, in wrapped_app
await app(scope, receive, sender)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\middleware\asyncexitstack.py", line 18, in call
await self.app(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\routing.py", line 660, in call
await self.middleware_stack(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 2685, in app
await route.handle(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 1267, in handle
await super().handle(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\routing.py", line 276, in handle
await self.app(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 151, in app
await wrap_app_handling_exceptions(app, request)(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette_exception_handler.py", line 59, in wrapped_app
response = await handler(conn, exc) # type: ignore[arg-type]
^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\app.py", line 606, in invalid_request
return _error_response(
status.HTTP_422_UNPROCESSABLE_CONTENT,
...<2 lines>...
details={"errors": error.errors()},
)
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\app.py", line 1465, in _error_response
return JSONResponse(status_code=response_status, content=error.model_dump(mode="json"))
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\responses.py", line 192, in init
super().init(content, status_code, headers, media_type, background)
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\responses.py", line 45, in init
self.body = self.render(content)
~~~~~~~~~~~^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\responses.py", line 201, in render
).encode("utf-8")
~~~~~~^^^^^^^^^
UnicodeEncodeError: 'utf-8' codec can't encode character '\udcae' in position 251: surrogates not allowed
2026-08-21T15:18:45+0800 INFO powercontext.server.access PowerContext transport request completed request_id=c240b20ba064ee92 trace_id=21f70d01e755a48309709b1d56c5e55e span_id=c240b20ba064ee92
2026-08-21T15:18:45+0800 INFO powercontext.server.access PowerContext transport request completed request_id=f80e356c8aa33025 trace_id=c330c401834ed2d3a9578e40bec91135 span_id=f80e356c8aa33025
2026-08-21T15:18:46+0800 INFO powercontext.server.access PowerContext transport request completed request_id=780fe461918cd435 trace_id=39e29f9e63c84dfcd83ecfc842d4bab1 span_id=780fe461918cd435
2026-08-21T15:19:04+0800 INFO powercontext.server.access PowerContext transport request completed request_id=3c9ddd48db1d4f33 trace_id=8b72e86dcb083b481d431766f36a6361 span_id=3c9ddd48db1d4f33
2026-08-21T15:19:04+0800 INFO powercontext.server.access PowerContext transport request completed request_id=7697a225680a40f3 trace_id=400c8366da584765c0d7eab71b0db6cb span_id=7697a225680a40f3
2026-08-21T15:19:06+0800 ERROR uvicorn.error Exception in ASGI application
Traceback (most recent call last):
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette_exception_handler.py", line 42, in wrapped_app
await app(scope, receive, sender)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 137, in app
response = await f(request)
^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 740, in app
raise validation_error
fastapi.exceptions.RequestValidationError: 1 validation error:
{'type': 'string_unicode', 'loc': ('body', 'query'), 'msg': 'Input should be a valid string, unable to parse raw data as a unicode string', 'input': '鎴戜娇鐢ㄧ殑榛樿\udcae\udca4python绠＄悊鍣ㄦ槸浠\udc80涔圽n'}

File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\app.py", line 1006, in prepare_context
POST /v1/context/prepare

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\uvicorn\protocols\http\h11_impl.py", line 416, in run_asgi
result = await app( # type: ignore[func-returns-value]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
self.scope, self.receive, self.send
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
)
^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\uvicorn\middleware\proxy_headers.py", line 63, in call
return await self.app(scope, receive, send)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\applications.py", line 1163, in call
await super().call(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\applications.py", line 90, in call
await self.middleware_stack(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\errors.py", line 186, in call
raise exc
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\errors.py", line 164, in call
await self.app(scope, receive, _send)
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\tracing.py", line 279, in call
await self.app(scope, receive, send_with_status)
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\access.py", line 64, in call
await self.app(scope, receive, send_with_access_log)
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\metrics.py", line 150, in call
await self.app(scope, receive, send_with_metrics)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\base.py", line 193, in call
response = await self.dispatch_func(request, call_next)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\app.py", line 597, in attach_request_id
response = await call_next(request)
^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\base.py", line 168, in call_next
raise app_exc from app_exc.cause or app_exc.context
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\base.py", line 144, in coro
await self.app(scope, receive_or_disconnect, send_no_error)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\exceptions.py", line 63, in call
await wrap_app_handling_exceptions(self.app, conn)(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette_exception_handler.py", line 53, in wrapped_app
raise exc
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette_exception_handler.py", line 42, in wrapped_app
await app(scope, receive, sender)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\middleware\asyncexitstack.py", line 18, in call
await self.app(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\routing.py", line 660, in call
await self.middleware_stack(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 2685, in app
await route.handle(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 1267, in handle
await super().handle(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\routing.py", line 276, in handle
await self.app(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 151, in app
await wrap_app_handling_exceptions(app, request)(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette_exception_handler.py", line 59, in wrapped_app
response = await handler(conn, exc) # type: ignore[arg-type]
^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\app.py", line 606, in invalid_request
return _error_response(
status.HTTP_422_UNPROCESSABLE_CONTENT,
...<2 lines>...
details={"errors": error.errors()},
)
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\app.py", line 1465, in _error_response
return JSONResponse(status_code=response_status, content=error.model_dump(mode="json"))
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\responses.py", line 192, in init
super().init(content, status_code, headers, media_type, background)
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\responses.py", line 45, in init
self.body = self.render(content)
~~~~~~~~~~~^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\responses.py", line 201, in render
).encode("utf-8")
~~~~~~^^^^^^^^^
UnicodeEncodeError: 'utf-8' codec can't encode characters in position 257-258: surrogates not allowed
2026-08-21T15:19:10+0800 INFO powercontext.server.access PowerContext transport request completed request_id=bb18bc3b1ae8a133 trace_id=edfba538ec7dfc3ace7d779eb55c4776 span_id=bb18bc3b1ae8a133
2026-08-21T15:19:23+0800 INFO powercontext.server.access PowerContext transport request completed request_id=bf5cf4e0601be414 trace_id=eafcc3c2d65c26e8296cdedfc7d25bd0 span_id=bf5cf4e0601be414
2026-08-21T15:19:23+0800 INFO powercontext.server.access PowerContext transport request completed request_id=7e8b8b2d1ff838b9 trace_id=2bea4eb95225288998dcbb2e45aa9fc8 span_id=7e8b8b2d1ff838b9
2026-08-21T15:19:47+0800 ERROR uvicorn.error Exception in ASGI application
Traceback (most recent call last):
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette_exception_handler.py", line 42, in wrapped_app
await app(scope, receive, sender)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 137, in app
response = await f(request)
^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 740, in app
raise validation_error
fastapi.exceptions.RequestValidationError: 1 validation error:
{'type': 'string_unicode', 'loc': ('body', 'query'), 'msg': 'Input should be a valid string, unable to parse raw data as a unicode string', 'input': '浣犵殑鎬濊\udc80冭繃绋嬩娇鐢╬owercontext璁板繂浜嗗悧\n'}

File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\app.py", line 1006, in prepare_context
POST /v1/context/prepare

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\uvicorn\protocols\http\h11_impl.py", line 416, in run_asgi
result = await app( # type: ignore[func-returns-value]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
self.scope, self.receive, self.send
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
)
^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\uvicorn\middleware\proxy_headers.py", line 63, in call
return await self.app(scope, receive, send)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\applications.py", line 1163, in call
await super().call(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\applications.py", line 90, in call
await self.middleware_stack(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\errors.py", line 186, in call
raise exc
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\errors.py", line 164, in call
await self.app(scope, receive, _send)
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\tracing.py", line 279, in call
await self.app(scope, receive, send_with_status)
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\access.py", line 64, in call
await self.app(scope, receive, send_with_access_log)
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\metrics.py", line 150, in call
await self.app(scope, receive, send_with_metrics)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\base.py", line 193, in call
response = await self.dispatch_func(request, call_next)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\app.py", line 597, in attach_request_id
response = await call_next(request)
^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\base.py", line 168, in call_next
raise app_exc from app_exc.cause or app_exc.context
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\base.py", line 144, in coro
await self.app(scope, receive_or_disconnect, send_no_error)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\exceptions.py", line 63, in call
await wrap_app_handling_exceptions(self.app, conn)(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette_exception_handler.py", line 53, in wrapped_app
raise exc
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette_exception_handler.py", line 42, in wrapped_app
await app(scope, receive, sender)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\middleware\asyncexitstack.py", line 18, in call
await self.app(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\routing.py", line 660, in call
await self.middleware_stack(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 2685, in app
await route.handle(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 1267, in handle
await super().handle(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\routing.py", line 276, in handle
await self.app(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 151, in app
await wrap_app_handling_exceptions(app, request)(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette_exception_handler.py", line 59, in wrapped_app
response = await handler(conn, exc) # type: ignore[arg-type]
^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\app.py", line 606, in invalid_request
return _error_response(
status.HTTP_422_UNPROCESSABLE_CONTENT,
...<2 lines>...
details={"errors": error.errors()},
)
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\app.py", line 1465, in _error_response
return JSONResponse(status_code=response_status, content=error.model_dump(mode="json"))
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\responses.py", line 192, in init
super().init(content, status_code, headers, media_type, background)
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\responses.py", line 45, in init
self.body = self.render(content)
~~~~~~~~~~~^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\responses.py", line 201, in render
).encode("utf-8")
~~~~~~^^^^^^^^^
UnicodeEncodeError: 'utf-8' codec can't encode character '\udc80' in position 254: surrogates not allowed
2026-08-21T15:19:53+0800 INFO powercontext.server.access PowerContext transport request completed request_id=59cf89b8f45fbf50 trace_id=c90268dc99c38e74105de3d7aceaff69 span_id=59cf89b8f45fbf50
2026-08-21T15:19:53+0800 INFO powercontext.server.access PowerContext transport request completed request_id=bc196514d1c7db00 trace_id=0c3b5bab0d30296bbcaa303dd1aed2a1 span_id=bc196514d1c7db00
2026-08-21T15:19:53+0800 INFO powercontext.server.access PowerContext transport request completed request_id=b3f693bea9ab6156 trace_id=0fcf2249ea2e1de359e11048887652e6 span_id=b3f693bea9ab6156
2026-08-21T15:20:09+0800 ERROR uvicorn.error Exception in ASGI application
Traceback (most recent call last):
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette_exception_handler.py", line 42, in wrapped_app
await app(scope, receive, sender)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 137, in app
response = await f(request)
^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 740, in app
raise validation_error
fastapi.exceptions.RequestValidationError: 1 validation error:
{'type': 'string_unicode', 'loc': ('body', 'query'), 'msg': 'Input should be a valid string, unable to parse raw data as a unicode string', 'input': '浣犺\udcaf诲彇 PowerContext 璁板繂 \n'}

File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\app.py", line 1006, in prepare_context
POST /v1/context/prepare

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\uvicorn\protocols\http\h11_impl.py", line 416, in run_asgi
result = await app( # type: ignore[func-returns-value]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
self.scope, self.receive, self.send
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
)
^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\uvicorn\middleware\proxy_headers.py", line 63, in call
return await self.app(scope, receive, send)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\applications.py", line 1163, in call
await super().call(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\applications.py", line 90, in call
await self.middleware_stack(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\errors.py", line 186, in call
raise exc
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\errors.py", line 164, in call
await self.app(scope, receive, _send)
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\tracing.py", line 279, in call
await self.app(scope, receive, send_with_status)
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\access.py", line 64, in call
await self.app(scope, receive, send_with_access_log)
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\metrics.py", line 150, in call
await self.app(scope, receive, send_with_metrics)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\base.py", line 193, in call
response = await self.dispatch_func(request, call_next)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\app.py", line 597, in attach_request_id
response = await call_next(request)
^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\base.py", line 168, in call_next
raise app_exc from app_exc.cause or app_exc.context
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\base.py", line 144, in coro
await self.app(scope, receive_or_disconnect, send_no_error)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\middleware\exceptions.py", line 63, in call
await wrap_app_handling_exceptions(self.app, conn)(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette_exception_handler.py", line 53, in wrapped_app
raise exc
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette_exception_handler.py", line 42, in wrapped_app
await app(scope, receive, sender)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\middleware\asyncexitstack.py", line 18, in call
await self.app(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\routing.py", line 660, in call
await self.middleware_stack(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 2685, in app
await route.handle(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 1267, in handle
await super().handle(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\routing.py", line 276, in handle
await self.app(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\fastapi\routing.py", line 151, in app
await wrap_app_handling_exceptions(app, request)(scope, receive, send)
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette_exception_handler.py", line 59, in wrapped_app
response = await handler(conn, exc) # type: ignore[arg-type]
^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\app.py", line 606, in invalid_request
return _error_response(
status.HTTP_422_UNPROCESSABLE_CONTENT,
...<2 lines>...
details={"errors": error.errors()},
)
File "C:\Users\m1346\Desktop\repos\powercontext\src\powercontext\server\app.py", line 1465, in _error_response
return JSONResponse(status_code=response_status, content=error.model_dump(mode="json"))
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\responses.py", line 192, in init
super().init(content, status_code, headers, media_type, background)
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\responses.py", line 45, in init
self.body = self.render(content)
~~~~~~~~~~~^^^^^^^^^
File "C:\Users\m1346\Desktop\repos\powercontext.venv\Lib\site-packages\starlette\responses.py", line 201, in render
).encode("utf-8")
~~~~~~^^^^^^^^^
UnicodeEncodeError: 'utf-8' codec can't encode character '\udcaf' in position 251: surrogates not allowed

Impact

  • Automatic context preparation fails for affected non-ASCII prompts.
  • The expected HTTP 422 response is replaced by an unhandled ASGI exception.
  • The hook fails open, so the normal agent turn may continue without PowerContext recall/capture.
  • The validation response may also expose the original query through the raw input field.

Likely cause

The hook reads JSON through json.load(sys.stdin) without explicitly enforcing UTF-8. On Windows, the subprocess standard input can use the system code page while Codex/Claude sends UTF-8 JSON.

Relevant code:

  • integrations/codex/plugins/powercontext/hooks/recall.py
  • integrations/claude-code/plugins/powercontext/hooks/user_prompt_submit.py
  • src/powercontext/server/app.py (RequestValidationError handler and _error_response)

Activity

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