update wechat and we should fix the bug introduced in 1c5fec5

.gitmodules

@@ -1,9 +1,9 @@
 [submodule "packages/leann-backend-diskann/third_party/DiskANN"]
 	path = packages/leann-backend-diskann/third_party/DiskANN
-	url = https://github.com/yichuan520030910320/DiskANN.git
+	url = https://github.com/yichuan-w/DiskANN.git
 [submodule "packages/leann-backend-hnsw/third_party/faiss"]
 	path = packages/leann-backend-hnsw/third_party/faiss
-	url = https://github.com/yichuan520030910320/faiss.git
+	url = https://github.com/yichuan-w/faiss.git
 [submodule "packages/leann-backend-hnsw/third_party/msgpack-c"]
 	path = packages/leann-backend-hnsw/third_party/msgpack-c
 	url = https://github.com/msgpack/msgpack-c.git

README.md

@@ -63,7 +63,7 @@ Traditional RAG systems often require trade-offs between storage, privacy, and u
 ### Installation
 
 ```bash
-git clone git@github.com:yichuan520030910320/LEANN-RAG.git leann
+git clone git@github.com:yichuan-w/LEANN.git leann
 cd leann
 git submodule update --init --recursive
 ```

examples/history_data/wechat_history.py

@@ -197,8 +197,8 @@ class WeChatHistoryReader(BaseReader):
         
         Args:
             messages: List of message dictionaries
-            max_length: Maximum length for concatenated message groups
+            max_length: Maximum length for concatenated message groups. Use -1 to disable length constraint.
-            time_window_minutes: Time window in minutes to group messages together
+            time_window_minutes: Time window in minutes to group messages together. Use -1 to disable time constraint.
             overlap_messages: Number of messages to overlap between consecutive groups
             
         Returns:
@@ -230,8 +230,8 @@ class WeChatHistoryReader(BaseReader):
             if not readable_text.strip():
                 continue
             
-            # Check time window constraint
+            # Check time window constraint (only if time_window_minutes != -1)
-            if last_timestamp is not None and create_time > 0:
+            if time_window_minutes != -1 and last_timestamp is not None and create_time > 0:
                 time_diff_minutes = (create_time - last_timestamp) / 60
                 if time_diff_minutes > time_window_minutes:
                     # Time gap too large, start new group
@@ -250,9 +250,9 @@ class WeChatHistoryReader(BaseReader):
                             current_group = []
                             current_length = 0
             
-            # Check length constraint
+            # Check length constraint (only if max_length != -1)
             message_length = len(readable_text)
-            if current_length + message_length > max_length and current_group:
+            if max_length != -1 and current_length + message_length > max_length and current_group:
                 # Current group would exceed max length, save it and start new
                 concatenated_groups.append({
                     'messages': current_group,
@@ -431,9 +431,9 @@ Contact: {contact_name}
                         # Concatenate messages based on rules
                         message_groups = self._concatenate_messages(
                             readable_messages, 
-                            max_length=max_length, 
+                            max_length=-1, 
-                            time_window_minutes=time_window_minutes,
+                            time_window_minutes=-1,
-                            overlap_messages=2  # Keep 2 messages overlap between groups
+                            overlap_messages=0  # Keep 2 messages overlap between groups
                         )
                         
                         # Create documents from concatenated groups

examples/wechat_history_reader_leann.py

@@ -52,7 +52,7 @@ def create_leann_index_from_multiple_wechat_exports(
                 documents = reader.load_data(
                     wechat_export_dir=str(export_dir),
                     max_count=max_count,
-                    concatenate_messages=True,  # Disable concatenation - one message per document
+                    concatenate_messages=False,  # Disable concatenation - one message per document
                 )
                 if documents:
                     print(f"Loaded {len(documents)} chat documents from {export_dir}")
@@ -78,7 +78,7 @@ def create_leann_index_from_multiple_wechat_exports(
         )
 
         # Create text splitter with 256 chunk size
-        text_splitter = SentenceSplitter(chunk_size=256, chunk_overlap=25)
+        text_splitter = SentenceSplitter(chunk_size=128, chunk_overlap=64)
 
         # Convert Documents to text strings and chunk them
         all_texts = []
@@ -224,7 +224,7 @@ async def query_leann_index(index_path: str, query: str):
         query,
         top_k=20,
         recompute_beighbor_embeddings=True,
-        complexity=64,
+        complexity=128,
         beam_width=1,
         llm_config={
             "type": "openai",