fix file path bug still compatiable bug in hnsw search

examples/main_cli_example.py

@@ -7,7 +7,7 @@ import asyncio
 import os
 import dotenv
 from leann.api import LeannBuilder, LeannSearcher, LeannChat
-import leann_backend_diskann # Import to ensure backend registration
+import leann_backend_hnsw # Import to ensure backend registration
 import shutil
 from pathlib import Path
 
@@ -50,7 +50,7 @@ if INDEX_DIR.exists():
 print(f"\n[PHASE 1] Building Leann index...")
 
 builder = LeannBuilder(
-    backend_name="diskann",
+    backend_name="hnsw",
     embedding_model="facebook/contriever", # Using a common sentence transformer model
     graph_degree=32, 
     complexity=64

packages/leann-backend-hnsw/leann_backend_hnsw/hnsw_backend.py

@@ -151,7 +151,7 @@ class HNSWBackend(LeannBackendFactoryInterface):
     @staticmethod
     def searcher(index_path: str, **kwargs) -> LeannBackendSearcherInterface:
         path = Path(index_path)
-        meta_path = path.parent / f"{path.stem}.hnsw.meta.json"
+        meta_path = path.parent / f"{path.name}.meta.json"
         if not meta_path.exists():
              raise FileNotFoundError(f"Leann metadata file not found at {meta_path}. Cannot infer vector dimension for searcher.")
         

test_pdf_index/pdf_documents.leann.meta.json

@@ -1,6 +1,6 @@
 {
   "version": "0.1.0",
-  "backend_name": "diskann",
+  "backend_name": "hnsw",
   "embedding_model": "facebook/contriever",
   "num_chunks": 826,
   "chunks": [