"""Minimal stub for HF deployment — no LLM chat, only KG Explorer."""
from pathlib import Path
import json

def load_environment():
    return {"llm_backend": {"provider": "none", "model": "none"}}

def save_environment(env):
    pass

def build_llm_client(env):
    return None

class AgentSession:
    def __init__(self):
        self.env = load_environment()
        self.history = []
        self._llm = None
    def set_llm_client(self, client):
        self._llm = client
    def _chat(self):
        return "[Chat disabled in this deployment. Only KG Explorer is available.]"