Update app.py

app.py

@@ -19,6 +19,9 @@ from langchain.llms import HuggingFacePipeline
 from langchain.schema import Document
 from transformers import AutoTokenizer, AutoModelForCausalLM, pipeline
 from transformers import T5ForConditionalGeneration, T5Tokenizer
+from sentence_transformers import SentenceTransformer
+
+model = SentenceTransformer("sentence-transformers/all-mpnet-base-v2")  # 1024次元のモデル
 
 # 条件付きインポート（ローカル環境とHugging Face Spacesの両方に対応）
 try: