Update backend/agent_instance.py

backend/agent_instance.py

@@ -1,5 +1,3 @@
-
-
 import sys
 import os
 
@@ -9,7 +7,9 @@ sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), "..",
 from txagent.txagent import TxAgent  # ✅ Now this will work
 
 def init_agent():
-    model_cache_dir = os.path.expanduser("~/.cache/txagent_models")
+    # ✅ Use /data for persistent model caching on Hugging Face Spaces
+    model_cache_dir = "/data/txagent_models"
+    os.makedirs(model_cache_dir, exist_ok=True)
     os.environ["TRANSFORMERS_CACHE"] = model_cache_dir
     os.environ["HF_HOME"] = model_cache_dir