`init_tokenizer_manager` wrote the chat-template-detected `reasoning_parser` /
`tool_call_parser` onto the published `ServerArgs`, after
`TokenizerManager.__init__` had already projected the config bags — so the
namespace readers and the resolved-config readback disagreed with the instance,
and a second `Engine` in the same process would inherit the first one's
detection through the shared bags.
Detection is per-engine control-plane state, which the manager already models:
`record_config_updates` records it, the readback endpoints overlay it, and
`config_value` reports what is in effect. `OpenAIServingChat` — the only reader
of these two fields in the tokenizer process — follows the overlay. The
architecture pass (`resolve_auto_parsers`, before the schedulers fork) is
unchanged: the scheduler resolves its own bags from the instance it receives.
Cheng Wan
d33ab39ebc