refusal_chain.py

# refusal_chain.py
import os
from langchain.chains import LLMChain
from langchain_groq import ChatGroq
from langchain_core.output_parsers import StrOutputParser
from prompts import refusal_prompt

def get_refusal_chain() -> LLMChain:
    """
    Builds the refusal chain for out-of-scope queries.
    """
    chat_groq_model = ChatGroq(
        model="Gemma2-9b-It",
        groq_api_key=os.environ["GROQ_API_KEY"]  # must be set in environment
    )
    output_parser=StrOutputParser()
    chain=refusal_prompt|chat_groq_model|output_parser
    return chain