llm-router-utils
Lightweight extraction of sglang's reasoning parser, tool-call parser, and chat template rendering, for use in custom router services and lightweight LLM applications.
This library does not include any inference engine code. It only provides the "frontend" message processing pipeline: OpenAIServingChat._process_messages and its dependencies.
Upstream source: sglang release/v0.5.16.
Usage
from llm_router_utils.sglang.srt.configs.model_config import ModelConfig
from llm_router_utils.sglang.srt.managers.tokenizer_manager import TokenizerManager
from llm_router_utils.sglang.srt.parser.template_manager import TemplateManager
from llm_router_utils.sglang.srt.entrypoints.openai.serving_chat import OpenAIServingChat
from llm_router_utils.sglang.srt.server_args import ServerArgs, PortArgs
server_args = ServerArgs(model_path="Qwen/Qwen3-32B", tool_call_parser="qwen3_coder")
port_args = PortArgs()
tokenizer_manager = TokenizerManager(server_args, port_args)
template_manager = TemplateManager()
template_manager.initialize_templates(
tokenizer_manager=tokenizer_manager,
model_path=server_args.model_path,
chat_template=server_args.chat_template,
)
openai_serving_chat = OpenAIServingChat(tokenizer_manager, template_manager)
result = openai_serving_chat._process_messages(request, is_multimodal=False)
License
Apache 2.0, adapted from sglang.
1 maintainer
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