Update app.py

app.py

@@ -478,21 +478,10 @@ def process_answer(question, full_text):
     embeddings = SentenceTransformerEmbeddings(model_name="all-MiniLM-L6-v2")
 
 
-    import tempfile
-    import os
-    import shutil
     from langchain_community.vectorstores import Chroma
     
-    # Writable temp directory for Hugging Face Spaces or similar
-    chroma_dir = os.path.join(tempfile.gettempdir(), "chroma_db")
-    
-    # Clean up old vectorstore
-    if os.path.exists(chroma_dir):
-        shutil.rmtree(chroma_dir)
-    os.makedirs(chroma_dir, exist_ok=True)
-    
-    # Create Chroma vector store
-    db = Chroma.from_documents(splits, embeddings, persist_directory=chroma_dir)
+    # Create Chroma in-memory vector store
+    db = Chroma.from_documents(splits, embeddings)
     retriever = db.as_retriever()