if self.sentence_transformer_client is None:
self.sentence_transformer_client = CrossEncoder(model_name_or_path=self.model, model_kwargs=self.model_kwargs)

knowledge = Knowledge(
    max_results=5,
    vector_db=LanceDb(
        uri="tmp/kbase",
        table_name="PP_SMIB",
        search_type=SearchType.hybrid,
        embedder=OllamaEmbedder(id="snowflake-arctic-embed2:latest",dimensions=1024),
        reranker=SentenceTransformerReranker(),
    ),
)

agent = Agent(
    
    model=VLLM(id="Qwen/Qwen3-4B-Instruct-2507", top_k=16, enable_thinking=False,base_url="http://localhost:9999/v1"),
    knowledge=knowledge,
    search_knowledge=True,
    add_knowledge_to_context=True,
    instructions=dedent("""
    You are a knowledge retrieval specialist. Your responsibilities include:

1. Thoroughly understanding the user’s query;
2. Retrieving the most relevant information from the knowledge base;
3. Evaluating whether the retrieved results are pertinent to the query;
4. Returning the results in a structured format, including content and source information;

    """),
      debug_mode=False,
    markdown=True
)