src/config.py

"""
Central place to load env vars and expose shared singletons.
"""

from functools import lru_cache
from pathlib import Path

from dotenv import load_dotenv
from langchain_groq import ChatGroq

# Load .env once when the module is imported
load_dotenv(dotenv_path=Path(__file__).resolve().parents[1] / ".env")

@lru_cache
def groq_llm(model: str = "llama3-70b-8192", temperature: float = 0.0):
    """Return a memoized Groq chat model instance."""
    return ChatGroq(model_name=model, temperature=temperature)