## OFF leg (stock): zerocost traces (expect empty)
  <none>
## OFF leg: Traceback/ERROR (expect empty)
150:(APIServer pid=105465) ERROR 09-13 07:27:55 [async_llm.py:829] AsyncLLM output_handler failed.
151:(APIServer pid=105465) ERROR 09-13 07:27:55 [async_llm.py:829] Traceback (most recent call last):
152:(APIServer pid=105465) ERROR 09-13 07:27:55 [async_llm.py:829]   File "/vllm-workspace/vllm-hust/vllm/v1/engine/async_llm.py", line 775, in output_handler
153:(APIServer pid=105465) ERROR 09-13 07:27:55 [async_llm.py:829]     outputs = await engine_core.get_output_async()
154:(APIServer pid=105465) ERROR 09-13 07:27:55 [async_llm.py:829]               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
155:(APIServer pid=105465) ERROR 09-13 07:27:55 [async_llm.py:829]   File "/vllm-workspace/vllm-hust/vllm/v1/engine/core_client.py", line 1175, in get_output_async
156:(APIServer pid=105465) ERROR 09-13 07:27:55 [async_llm.py:829]     raise self._format_exception(outputs) from None
157:(APIServer pid=105465) ERROR 09-13 07:27:55 [async_llm.py:829] vllm.v1.engine.exceptions.EngineDeadError: EngineCore encountered an issue. See stack trace (above) for the root cause.
## ON leg: zerocost ACTIVE lines
15:zero-cost wiring ① refused (VLLM_HUST_FI_PREFILL_OUT=1): a host anchor moved; the process stays on the stock FIA call + copy path
61:(EngineCore pid=135571) zero-cost wiring ① refused (VLLM_HUST_FI_PREFILL_OUT=1): a host anchor moved; the process stays on the stock FIA call + copy path
73:(EngineCore pid=135571) zero-cost wiring ② is ACTIVE (VLLM_HUST_SKIP_COS_SIN=1): update_cos_sin now records positions only and get_cos_and_sin_slice() materialises the rope buffers on demand.
## ON leg: injected keys visible in process env line
15:zero-cost wiring ① refused (VLLM_HUST_FI_PREFILL_OUT=1): a host anchor moved; the process stays on the stock FIA call + copy path
37:(APIServer pid=128153) WARNING 09-13 07:28:41 [envs.py:2296] Unknown vLLM environment variable detected: VLLM_HUST_FI_PREFILL_OUT
38:(APIServer pid=128153) WARNING 09-13 07:28:41 [envs.py:2296] Unknown vLLM environment variable detected: VLLM_HUST_SKIP_COS_SIN
61:(EngineCore pid=135571) zero-cost wiring ① refused (VLLM_HUST_FI_PREFILL_OUT=1): a host anchor moved; the process stays on the stock FIA call + copy path
73:(EngineCore pid=135571) zero-cost wiring ② is ACTIVE (VLLM_HUST_SKIP_COS_SIN=1): update_cos_sin now records positions only and get_cos_and_sin_slice() materialises the rope buffers on demand.
## ON leg: Traceback (expect empty)
16:Traceback (most recent call last):
62:(EngineCore pid=135571) Traceback (most recent call last):
