diff --git a/bench/halumem/analyze_dataset_stats.py b/bench/halumem/analyze_dataset_stats.py
index 6695ad7f..d5a213b4 100644
--- a/bench/halumem/analyze_dataset_stats.py
+++ b/bench/halumem/analyze_dataset_stats.py
@@ -29,6 +29,7 @@ class UserStats:
     dialogues_per_session: list[int]  # 每个 session 的对话数量
     dialogue_lengths_per_session: list[int]  # 每个 session 的对话总长度（字符数）
     num_chunks_after_split: int  # 按 5000 字符分割后的 chunk 数量
+    session_time_ranges: list[tuple[Any, Any]]  # 每个 session 的 (开始时间, 结束时间)
 
 
 @dataclass
@@ -169,6 +170,7 @@ class DatasetAnalyzer:
         
         dialogues_per_session = []
         dialogue_lengths_per_session = []
+        session_time_ranges = []
         total_chunks = 0
         
         for session in sessions:
@@ -179,6 +181,11 @@ class DatasetAnalyzer:
             dialogues_per_session.append(num_dialogues)
             dialogue_lengths_per_session.append(dialogue_length)
             
+            # 收集 session 的时间范围
+            start_time = session.get("start_time", None)
+            end_time = session.get("end_time", None)
+            session_time_ranges.append((start_time, end_time))
+            
             # 计算这个 session 分割后的 chunk 数量
             num_chunks = self.split_session_into_chunks(dialogue, max_length=5000)
             total_chunks += num_chunks
@@ -202,7 +209,8 @@ class DatasetAnalyzer:
             num_sessions=len(sessions),
             dialogues_per_session=dialogues_per_session,
             dialogue_lengths_per_session=dialogue_lengths_per_session,
-            num_chunks_after_split=total_chunks
+            num_chunks_after_split=total_chunks,
+            session_time_ranges=session_time_ranges
         )
         
         self.user_stats_list.append(user_stats)
@@ -392,6 +400,32 @@ class DatasetAnalyzer:
             print(f"    平均每 Session 对话长度: {avg_length:.2f} 字符")
             print()
     
+    def print_first_user_session_times(self):
+        """打印第一个用户的每个 session 的时间范围"""
+        if not self.user_stats_list:
+            print("\n没有用户数据")
+            return
+        
+        first_user = self.user_stats_list[0]
+        
+        print("\n" + "=" * 80)
+        print(f"第一个用户的 Session 时间统计")
+        print("=" * 80 + "\n")
+        print(f"用户名: {first_user.user_name}")
+        print(f"UUID: {first_user.uuid}")
+        print(f"总 Session 数: {first_user.num_sessions}\n")
+        
+        print("-" * 80)
+        print(f"{'Session #':<12} {'开始时间':<30} {'结束时间':<30}")
+        print("-" * 80)
+        
+        for idx, (start_time, end_time) in enumerate(first_user.session_time_ranges, 1):
+            start_str = str(start_time) if start_time is not None else "无"
+            end_str = str(end_time) if end_time is not None else "无"
+            print(f"{idx:<12} {start_str:<30} {end_str:<30}")
+        
+        print("=" * 80)
+    
     def print_user_split_summary(self):
         """打印每个用户的分割统计摘要（表格形式）"""
         print("\n" + "=" * 80)
@@ -469,7 +503,11 @@ class DatasetAnalyzer:
                         if u.dialogue_lengths_per_session else 0
                     ),
                     "dialogues_per_session": u.dialogues_per_session,
-                    "dialogue_lengths_per_session": u.dialogue_lengths_per_session
+                    "dialogue_lengths_per_session": u.dialogue_lengths_per_session,
+                    "session_time_ranges": [
+                        {"start_time": start, "end_time": end}
+                        for start, end in u.session_time_ranges
+                    ]
                 }
                 for u in self.user_stats_list
             ]
@@ -498,6 +536,9 @@ def main(data_path: str, output_path: str = None, show_per_user: bool = False):
     # 打印摘要
     analyzer.print_summary(stats)
     
+    # 打印第一个用户的 session 时间统计
+    analyzer.print_first_user_session_times()
+    
     # 打印每个用户的分割统计摘要（始终显示）
     analyzer.print_user_split_summary()
     
diff --git a/bench/halumem/eval_reme_simple_v3.py b/bench/halumem/eval_reme_simple_v3.py
new file mode 100644
index 00000000..62b1fe64
--- /dev/null
+++ b/bench/halumem/eval_reme_simple_v3.py
@@ -0,0 +1,668 @@
+"""
+HaluMem Benchmark Evaluator for ReMe V3 - Question Answering
+
+A modular evaluation pipeline that:
+1. Loads HaluMem benchmark data
+2. Processes user sessions through ReMe V3 (summarization + retrieval)
+3. Evaluates question answering performance
+4. Generates comprehensive metrics
+
+Usage:
+    python bench/halumem/eval_reme_simple_v3.py \
+        --data_path /Users/yuli/workspace/HaluMem/data/HaluMem-Medium.jsonl \
+        --top_k 20 --user_num 100 --max_concurrency 20
+"""
+
+import asyncio
+import json
+import os
+import re
+import time
+from dataclasses import dataclass
+from datetime import datetime, timezone
+from pathlib import Path
+from typing import Any
+
+from loguru import logger
+
+from eval_tools import evaluation_for_question2
+from reme_ai.core.enumeration import MemoryType
+from reme_ai.core.schema import MemoryNode
+from reme_ai.reme import ReMe
+
+
+# ==================== Configuration ====================
+
+@dataclass
+class EvalConfig:
+    """Evaluation configuration parameters."""
+    data_path: str
+    top_k: int = 20
+    user_num: int = 1
+    max_concurrency: int = 2
+    batch_size: int = 20
+    output_dir: str = "bench_results/reme_simple_v3"
+
+
+# ==================== Utilities ====================
+
+class DataLoader:
+    """Handles loading and parsing of HaluMem data."""
+    
+    @staticmethod
+    def load_jsonl(file_path: str) -> list[dict]:
+        """Load all entries from a JSONL file."""
+        with open(file_path, "r", encoding="utf-8") as f:
+            return [json.loads(line.strip()) for line in f if line.strip()]
+    
+    @staticmethod
+    def extract_user_name(persona_info: str) -> str:
+        """Extract user name from persona info string."""
+        match = re.search(r"Name:\s*(.*?); Gender:", persona_info)
+        if not match:
+            raise ValueError(f"No name found in persona_info: {persona_info}")
+        return match.group(1).strip()
+    
+    @staticmethod
+    def format_dialogue_messages(dialogue: list[dict]) -> list[dict]:
+        """Format dialogue into ReMe message format with conversation_time (user messages only)."""
+        return [
+            {
+                "role": turn["role"],
+                "content": turn["content"],
+                "time_created": datetime.strptime(
+                    turn["timestamp"], "%b %d, %Y, %H:%M:%S"
+                )
+                .replace(tzinfo=timezone.utc)
+                .strftime("%Y-%m-%d %H:%M:%S"),
+            }
+            for turn in dialogue
+            if turn["role"] == "user"  # Only include user messages
+        ]
+    
+    @staticmethod
+    def format_dialogue_for_eval(dialogue: list[dict], user_name: str = None) -> str:
+        """Format dialogue into string for evaluation."""
+        formatted_turns = []
+        for turn in dialogue:
+            timestamp = datetime.strptime(
+                turn["timestamp"], "%b %d, %Y, %H:%M:%S"
+            ).replace(tzinfo=timezone.utc).strftime("%Y-%m-%d %H:%M:%S")
+            
+            # Use user_name if role is 'user' and user_name is provided
+            role = user_name if turn['role'] == 'user' and user_name else turn['role']
+            
+            formatted_turns.append(
+                f"Role: {role}\n"
+                f"Content: {turn['content']}\n"
+                f"Time: {timestamp}"
+            )
+        return "\n\n".join(formatted_turns)
+
+
+class FileManager:
+    """Manages file I/O operations."""
+    
+    def __init__(self, base_dir: str):
+        self.base_dir = Path(base_dir)
+        self.tmp_dir = self.base_dir / "tmp"
+        self.tmp_dir.mkdir(parents=True, exist_ok=True)
+    
+    def get_user_dir(self, user_name: str) -> Path:
+        """Get the directory path for a user."""
+        user_dir = self.tmp_dir / user_name
+        user_dir.mkdir(parents=True, exist_ok=True)
+        return user_dir
+    
+    def get_session_file(self, user_name: str, session_id: int) -> Path:
+        """Get the file path for a specific session."""
+        return self.get_user_dir(user_name) / f"session_{session_id}.json"
+    
+    def save_session(self, user_name: str, session_id: int, data: dict):
+        """Save session data to file."""
+        file_path = self.get_session_file(user_name, session_id)
+        with open(file_path, "w", encoding="utf-8") as f:
+            json.dump(data, f, ensure_ascii=False, indent=2)
+        logger.info(f"✅ Saved session {session_id} to {file_path}")
+    
+    def load_session(self, user_name: str, session_id: int) -> dict | None:
+        """Load session data from file."""
+        file_path = self.get_session_file(user_name, session_id)
+        if not file_path.exists():
+            return None
+        with open(file_path, "r", encoding="utf-8") as f:
+            return json.load(f)
+    
+    def user_has_cache(self, user_name: str) -> bool:
+        """Check if user has cached results."""
+        user_dir = self.get_user_dir(user_name)
+        return any(f.name.startswith("session_") and f.suffix == ".json" 
+                  for f in user_dir.iterdir())
+    
+    def combine_results(self, output_file: str):
+        """Combine all user session files into a single JSONL file."""
+        with open(output_file, "w", encoding="utf-8") as f_out:
+            for user_dir in self.tmp_dir.iterdir():
+                if not user_dir.is_dir():
+                    continue
+                
+                session_files = sorted([
+                    f for f in user_dir.iterdir() 
+                    if f.name.startswith("session_") and f.suffix == ".json"
+                ])
+                
+                if not session_files:
+                    continue
+                
+                # Load first session to get user metadata
+                with open(session_files[0], "r", encoding="utf-8") as f_in:
+                    first_session = json.load(f_in)
+                
+                user_data = {
+                    "uuid": first_session["uuid"],
+                    "user_name": first_session["user_name"],
+                    "sessions": []
+                }
+                
+                # Load all sessions
+                for session_file in session_files:
+                    with open(session_file, "r", encoding="utf-8") as f_in:
+                        session_data = json.load(f_in)
+                        # Remove redundant user metadata
+                        session_data.pop("uuid", None)
+                        session_data.pop("user_name", None)
+                        user_data["sessions"].append(session_data)
+                
+                f_out.write(json.dumps(user_data, ensure_ascii=False) + "\n")
+
+
+# ==================== Memory Operations ====================
+
+class MemoryProcessor:
+    """Handles ReMe V3 memory operations."""
+    
+    def __init__(self, reme: ReMe):
+        self.reme = reme
+    
+    async def add_memories(
+        self, 
+        user_id: str, 
+        messages: list[dict],
+        batch_size: int = 10000
+    ) -> tuple[list[str], list[list[dict]], float]:
+        """
+        Add memories in batches using ReMe V3 and return extracted memory contents.
+        
+        Returns:
+            tuple: (extracted_memories, agent_messages, total_duration_ms)
+        """
+        added_memories: list[MemoryNode] = []
+        deleted_memories: list[str] = []
+        all_agent_messages: list = []
+        total_duration_ms = 0
+        
+        for i in range(0, len(messages), batch_size):
+            batch = messages[i:i + batch_size]
+            start = time.time()
+            
+            # Use summary_v3 instead of summary_v2
+            memory_nodes, agent_messages, success = await self.reme.summary_v3(
+                messages=batch, 
+                user_id=user_id
+            )
+            
+            duration_ms = (time.time() - start) * 1000
+            total_duration_ms += duration_ms
+            
+            # Save agent messages for this batch
+            if agent_messages:
+                all_agent_messages.extend(agent_messages)
+            
+            if memory_nodes:
+                for node in memory_nodes:
+                    if isinstance(node, MemoryNode) and node.memory_type == MemoryType.HISTORY:
+                        continue
+
+                    if isinstance(node, MemoryNode):
+                        added_memories.append(node)
+
+                    if isinstance(node, str):
+                        deleted_memories.append(node)
+
+        extracted_memories = deleted_memories
+        extracted_memories += ["[delete]" + n.format_memory() for n in added_memories if n.memory_id in deleted_memories]
+        extracted_memories += ["[add]" + n.format_memory() for n in added_memories if n.memory_id not in deleted_memories]
+        return extracted_memories, all_agent_messages, total_duration_ms
+    
+    async def search_memory(
+        self, 
+        query: str, 
+        user_id: str, 
+        top_k: int = 20
+    ) -> tuple[str, list, float]:
+        """
+        Search memory using ReMe V3 and return response.
+        
+        Returns:
+            tuple: (response, agent_messages, duration_ms)
+        """
+        start = time.time()
+        
+        # Use retrieve_v3 instead of retrieve_v2
+        response, agent_messages, success = await self.reme.retrieve_v3(
+            query=query, 
+            user_id=user_id, 
+            top_k=top_k
+        )
+        
+        duration_ms = (time.time() - start) * 1000
+        return response, agent_messages, duration_ms
+
+
+# ==================== Evaluation ====================
+
+class QuestionAnsweringEvaluator:
+    """Evaluates question answering performance."""
+    
+    def __init__(self, memory_processor: MemoryProcessor, top_k: int):
+        self.memory_processor = memory_processor
+        self.top_k = top_k
+    
+    async def evaluate_questions(
+        self,
+        questions: list[dict],
+        user_name: str,
+        uuid: str,
+        session_id: int,
+        formatted_dialogue: str
+    ) -> list[dict]:
+        """Evaluate all questions for a session."""
+        results = []
+        
+        for qa in questions:
+            # Search memory for answer using V3
+            response, agent_messages, duration_ms = await self.memory_processor.search_memory(
+                query=qa["question"],
+                user_id=user_name,
+                top_k=self.top_k
+            )
+            
+            # Evaluate response
+            evidence_text = "\n".join([e["memory_content"] for e in qa["evidence"]])
+            eval_result = await evaluation_for_question2(
+                qa["question"],
+                qa["answer"],
+                evidence_text,
+                response,
+                formatted_dialogue
+            )
+            
+            # Build result record
+            qa_result = {
+                **qa,
+                "uuid": uuid,
+                "session_id": session_id,
+                "system_response": response,
+                "retrieve_messages": [m.model_dump() for m in agent_messages],
+                "search_duration_ms": duration_ms,
+                "result_type": eval_result.get("evaluation_result"),
+                "question_answering_reasoning": eval_result.get("reasoning", "")
+            }
+            results.append(qa_result)
+        
+        return results
+
+
+class MetricsAggregator:
+    """Aggregates evaluation metrics."""
+    
+    @staticmethod
+    def compute_qa_metrics(qa_records: list[dict]) -> dict[str, Any]:
+        """Compute question answering metrics."""
+        total = len(qa_records)
+        if total == 0:
+            return {
+                "correct_qa_ratio(all)": 0,
+                "hallucination_qa_ratio(all)": 0,
+                "omission_qa_ratio(all)": 0,
+                "correct_qa_ratio(valid)": 0,
+                "hallucination_qa_ratio(valid)": 0,
+                "omission_qa_ratio(valid)": 0,
+                "qa_valid_num": 0,
+                "qa_num": 0
+            }
+        
+        correct = 0
+        hallucination = 0
+        omission = 0
+        valid = 0
+        
+        for qa in qa_records:
+            result_type = qa.get("result_type", "")
+            
+            if result_type in ["Correct", "Hallucination", "Omission"]:
+                valid += 1
+                if result_type == "Correct":
+                    correct += 1
+                elif result_type == "Hallucination":
+                    hallucination += 1
+                elif result_type == "Omission":
+                    omission += 1
+        
+        metrics = {
+            "correct_qa_ratio(all)": correct / total,
+            "hallucination_qa_ratio(all)": hallucination / total,
+            "omission_qa_ratio(all)": omission / total,
+            "qa_valid_num": valid,
+            "qa_num": total
+        }
+        
+        if valid > 0:
+            metrics.update({
+                "correct_qa_ratio(valid)": correct / valid,
+                "hallucination_qa_ratio(valid)": hallucination / valid,
+                "omission_qa_ratio(valid)": omission / valid
+            })
+        else:
+            metrics.update({
+                "correct_qa_ratio(valid)": 0,
+                "hallucination_qa_ratio(valid)": 0,
+                "omission_qa_ratio(valid)": 0
+            })
+        
+        return metrics
+    
+    @staticmethod
+    def compute_time_metrics(eval_results_file: str) -> dict[str, float]:
+        """Compute timing metrics from evaluation results."""
+        add_duration = 0
+        search_duration = 0
+        
+        with open(eval_results_file, "r", encoding="utf-8") as f:
+            for line in f:
+                if not line.strip():
+                    continue
+                user_data = json.loads(line)
+                
+                for session in user_data["sessions"]:
+                    add_duration += session.get("add_dialogue_duration_ms", 0)
+                    
+                    eval_results = session.get("evaluation_results", {})
+                    for qa in eval_results.get("question_answering_records", []):
+                        search_duration += qa.get("search_duration_ms", 0)
+        
+        # Convert to minutes
+        return {
+            "add_dialogue_duration_time": add_duration / 1000 / 60,
+            "search_memory_duration_time": search_duration / 1000 / 60,
+            "total_duration_time": (add_duration + search_duration) / 1000 / 60
+        }
+
+
+# ==================== Main Pipeline ====================
+
+class HaluMemEvaluatorV3:
+    """Main evaluator orchestrating the entire ReMe V3 pipeline."""
+    
+    def __init__(self, config: EvalConfig):
+        self.config = config
+        self.reme = ReMe()
+        self.file_manager = FileManager(config.output_dir)
+        self.memory_processor = MemoryProcessor(self.reme)
+        self.qa_evaluator = QuestionAnsweringEvaluator(
+            self.memory_processor, 
+            config.top_k
+        )
+        self.data_loader = DataLoader()
+    
+    async def process_session(
+        self,
+        session: dict,
+        session_id: int,
+        user_name: str,
+        uuid: str
+    ) -> dict:
+        """Process a single session using ReMe V3."""
+        session_data = {
+            "uuid": uuid,
+            "user_name": user_name,
+            "session_id": session_id,
+            "memory_points": session["memory_points"]
+        }
+        
+        # Skip generated QA sessions
+        if session.get("is_generated_qa_session", False):
+            session_data["is_generated_qa_session"] = True
+            return session_data
+        
+        # Format and add dialogue to memory using V3
+        dialogue = session["dialogue"]
+        formatted_messages = self.data_loader.format_dialogue_messages(dialogue)
+        
+        extracted_memories, agent_messages, duration_ms = await self.memory_processor.add_memories(
+            user_id=user_name,
+            messages=formatted_messages,
+            batch_size=self.config.batch_size
+        )
+        
+        session_data.update({
+            "dialogue": dialogue,
+            "extracted_memories": extracted_memories,
+            "summary_messages": [m.model_dump() for m in agent_messages],
+            "add_dialogue_duration_ms": duration_ms
+        })
+        
+        # Evaluate questions if present
+        if "questions" in session:
+            formatted_dialogue = self.data_loader.format_dialogue_for_eval(dialogue, user_name)
+            qa_results = await self.qa_evaluator.evaluate_questions(
+                questions=session["questions"],
+                user_name=user_name,
+                uuid=uuid,
+                session_id=session_id,
+                formatted_dialogue=formatted_dialogue
+            )
+            
+            session_data["evaluation_results"] = {
+                "question_answering_records": qa_results
+            }
+        
+        return session_data
+    
+    async def process_user(self, user_data: dict) -> dict:
+        """Process all sessions for a user."""
+        user_name = self.data_loader.extract_user_name(user_data["persona_info"])
+        uuid = user_data["uuid"]
+        
+        logger.info(f"Processing user: {user_name}")
+        
+        for idx, session in enumerate(user_data["sessions"]):
+            logger.info(f"  Session {idx + 1}/{len(user_data['sessions'])}")
+            
+            session_data = await self.process_session(
+                session=session,
+                session_id=idx,
+                user_name=user_name,
+                uuid=uuid
+            )
+            
+            self.file_manager.save_session(user_name, idx, session_data)
+        
+        return {"uuid": uuid, "user_name": user_name, "status": "ok"}
+    
+    async def run_evaluation(self):
+        """Run the complete evaluation pipeline using ReMe V3."""
+        start_time = time.time()
+        
+        # Clear existing data
+        await self.reme.vector_store.delete_all()
+        
+        # Load user data
+        all_users = self.data_loader.load_jsonl(self.config.data_path)
+        users_to_process = all_users[:self.config.user_num]
+        
+        print("\n" + "=" * 80)
+        print("HALUMEM EVALUATION - REME V3 - QUESTION ANSWERING")
+        print(f"Users: {len(users_to_process)} | Concurrency: {self.config.max_concurrency}")
+        print("=" * 80 + "\n")
+        
+        # Process users with concurrency control
+        semaphore = asyncio.Semaphore(self.config.max_concurrency)
+        
+        async def process_with_cache_check(idx: int, user_data: dict):
+            async with semaphore:
+                user_name = self.data_loader.extract_user_name(user_data["persona_info"])
+                
+                # Check cache
+                if self.file_manager.user_has_cache(user_name):
+                    print(f"⚡ [{idx}/{len(users_to_process)}] Skipping {user_name} (cached)")
+                    return {"user_name": user_name, "status": "cached"}
+                
+                print(f"🔄 [{idx}/{len(users_to_process)}] Processing {user_name}...")
+                result = await self.process_user(user_data)
+                print(f"✅ [{idx}/{len(users_to_process)}] Completed {user_name}")
+                return result
+        
+        tasks = [
+            process_with_cache_check(idx, user) 
+            for idx, user in enumerate(users_to_process, 1)
+        ]
+        await asyncio.gather(*tasks)
+        
+        # Combine results
+        output_file = os.path.join(self.config.output_dir, "eval_results.jsonl")
+        self.file_manager.combine_results(output_file)
+        
+        elapsed = time.time() - start_time
+        print(f"\n✅ Processing completed in {elapsed:.2f}s")
+        print(f"📁 Results: {output_file}\n")
+        
+        # Aggregate metrics
+        await self.aggregate_and_report(output_file)
+    
+    async def aggregate_and_report(self, results_file: str):
+        """Aggregate results and generate final report."""
+        print("=" * 80)
+        print("AGGREGATING METRICS")
+        print("=" * 80 + "\n")
+        
+        # Collect all QA records
+        qa_records = []
+        with open(results_file, "r", encoding="utf-8") as f:
+            for line in f:
+                if not line.strip():
+                    continue
+                user_data = json.loads(line)
+                
+                for session in user_data["sessions"]:
+                    if session.get("is_generated_qa_session"):
+                        continue
+                    
+                    eval_results = session.get("evaluation_results", {})
+                    qa_records.extend(
+                        eval_results.get("question_answering_records", [])
+                    )
+        
+        # Compute metrics
+        qa_metrics = MetricsAggregator.compute_qa_metrics(qa_records)
+        time_metrics = MetricsAggregator.compute_time_metrics(results_file)
+        
+        final_results = {
+            "overall_score": {
+                "question_answering": qa_metrics,
+                "time_consuming": time_metrics
+            },
+            "question_answering_records": qa_records
+        }
+        
+        # Save final report
+        report_file = os.path.join(self.config.output_dir, "eval_statistics.json")
+        with open(report_file, "w", encoding="utf-8") as f:
+            json.dump(final_results, f, ensure_ascii=False, indent=4)
+        
+        print(f"📊 Statistics saved to: {report_file}\n")
+        
+        # Print summary
+        self._print_summary(qa_metrics, time_metrics)
+    
+    def _print_summary(self, qa_metrics: dict, time_metrics: dict):
+        """Print evaluation summary."""
+        print("=" * 80)
+        print("EVALUATION SUMMARY - REME V3")
+        print("=" * 80 + "\n")
+        
+        print("📊 Question Answering:")
+        print(f"  Correct (all):       {qa_metrics['correct_qa_ratio(all)']:.4f}")
+        print(f"  Hallucination (all): {qa_metrics['hallucination_qa_ratio(all)']:.4f}")
+        print(f"  Omission (all):      {qa_metrics['omission_qa_ratio(all)']:.4f}")
+        print(f"  Correct (valid):     {qa_metrics['correct_qa_ratio(valid)']:.4f}")
+        print(f"  Hallucination (valid): {qa_metrics['hallucination_qa_ratio(valid)']:.4f}")
+        print(f"  Omission (valid):    {qa_metrics['omission_qa_ratio(valid)']:.4f}")
+        print(f"  Valid/Total:         {qa_metrics['qa_valid_num']}/{qa_metrics['qa_num']}")
+        
+        print(f"\n⏱️  Time Metrics:")
+        print(f"  Memory Addition:  {time_metrics['add_dialogue_duration_time']:.2f} min")
+        print(f"  Memory Search:    {time_metrics['search_memory_duration_time']:.2f} min")
+        print(f"  Total:            {time_metrics['total_duration_time']:.2f} min")
+        print("\n" + "=" * 80)
+
+
+# ==================== Entry Point ====================
+
+def main(
+    data_path: str,
+    top_k: int = 20,
+    user_num: int = 1,
+    max_concurrency: int = 2
+):
+    """Main entry point for ReMe V3 evaluation."""
+    config = EvalConfig(
+        data_path=data_path,
+        top_k=top_k,
+        user_num=user_num,
+        max_concurrency=max_concurrency
+    )
+    
+    evaluator = HaluMemEvaluatorV3(config)
+    asyncio.run(evaluator.run_evaluation())
+
+
+if __name__ == "__main__":
+    import argparse
+    
+    parser = argparse.ArgumentParser(
+        description="Evaluate ReMe V3 on HaluMem benchmark (Question Answering)"
+    )
+    parser.add_argument(
+        "--data_path",
+        type=str,
+        required=True,
+        help="Path to HaluMem JSONL file"
+    )
+    parser.add_argument(
+        "--top_k",
+        type=int,
+        default=20,
+        help="Number of memories to retrieve (default: 20)"
+    )
+    parser.add_argument(
+        "--user_num",
+        type=int,
+        default=1,
+        help="Number of users to evaluate (default: 1)"
+    )
+    parser.add_argument(
+        "--max_concurrency",
+        type=int,
+        default=2,
+        help="Maximum concurrent user processing (default: 2)"
+    )
+    
+    args = parser.parse_args()
+    
+    main(
+        data_path=args.data_path,
+        top_k=args.top_k,
+        user_num=args.user_num,
+        max_concurrency=args.max_concurrency
+    )
diff --git a/reme_ai/core/context/prompt_handler.py b/reme_ai/core/context/prompt_handler.py
index e48f98ac..b428b163 100644
--- a/reme_ai/core/context/prompt_handler.py
+++ b/reme_ai/core/context/prompt_handler.py
@@ -55,7 +55,7 @@ class PromptHandler(BaseContext):
             key += "_" + self.language.strip()
 
         assert key in self, f"prompt_name={key} not found."
-        return self[key]
+        return self[key].strip()
 
     def prompt_format(self, prompt_name: str, **kwargs) -> str:
         """Format a prompt by filtering flagged lines and filling template variables."""
diff --git a/reme_ai/core/schema/tool_call.py b/reme_ai/core/schema/tool_call.py
index 0a96f8c4..035c63f1 100644
--- a/reme_ai/core/schema/tool_call.py
+++ b/reme_ai/core/schema/tool_call.py
@@ -41,14 +41,14 @@ class ToolAttr(BaseModel):
         if self.enum:
             res["enum"] = self.enum
 
-        if self.type == "object" and self.properties:
+        if self.type == "object" and self.properties is not None:
             res["properties"] = {
                 k: v.simple_input_dump() if isinstance(v, ToolAttr) else v for k, v in self.properties.items()
             }
-            if self.required:
+            if self.required is not None:
                 res["required"] = self.required
 
-        if self.type == "array" and self.items:
+        if self.type == "array" and self.items is not None:
             res["items"] = self.items.simple_input_dump() if isinstance(self.items, ToolAttr) else self.items
 
         return res
diff --git a/reme_ai/core/utils/__init__.py b/reme_ai/core/utils/__init__.py
index 242f7be9..23396f97 100644
--- a/reme_ai/core/utils/__init__.py
+++ b/reme_ai/core/utils/__init__.py
@@ -9,7 +9,15 @@ from .http_client import HttpClient
 from .llm_utils import extract_content, format_messages, deduplicate_memories
 from .logger_utils import init_logger
 from .logo_utils import print_logo
-from .mcp_client import MCPClient
+
+# Make MCPClient import optional to avoid breaking if MCP dependencies are not available
+try:
+    from .mcp_client import MCPClient
+    _HAS_MCP = True
+except ImportError:
+    MCPClient = None
+    _HAS_MCP = False
+
 from .pydantic_config_parser import PydanticConfigParser
 from .pydantic_utils import create_pydantic_model
 from .singleton import singleton
diff --git a/reme_ai/core/utils/cache_handler.py b/reme_ai/core/utils/cache_handler.py
index 70c8585a..f3b0072f 100644
--- a/reme_ai/core/utils/cache_handler.py
+++ b/reme_ai/core/utils/cache_handler.py
@@ -15,7 +15,7 @@ class CacheHandler:
     _EXTENSIONS = {
         pd.DataFrame: ".csv",
         dict: ".json",
-        list: ".json",
+        list: ".jsonl",
         str: ".txt",
     }
 
@@ -76,11 +76,17 @@ class CacheHandler:
             data.to_csv(path, index=kwargs.get("index", False), encoding="utf-8")
             return {"row_count": len(data), "file_size": path.stat().st_size}
 
-        if dtype in (dict, list):
+        if dtype is dict:
             with open(path, "w", encoding="utf-8") as f:
                 json.dump(data, f, ensure_ascii=False, indent=2)
             return {"item_count": len(data), "file_size": path.stat().st_size}
 
+        if dtype is list:
+            with open(path, "w", encoding="utf-8") as f:
+                for item in data:
+                    f.write(json.dumps(item, ensure_ascii=False) + "\n")
+            return {"item_count": len(data), "file_size": path.stat().st_size}
+
         if dtype is str:
             path.write_text(data, encoding=kwargs.get("encoding", "utf-8"))
             return {"char_count": len(data), "file_size": path.stat().st_size}
@@ -92,9 +98,17 @@ class CacheHandler:
         """Execute type-specific load operations."""
         if type_name == "DataFrame":
             return pd.read_csv(path, encoding=kwargs.get("encoding", "utf-8"))
-        if type_name in ("dict", "list"):
+        if type_name == "dict":
             with open(path, "r", encoding="utf-8") as f:
                 return json.load(f)
+        if type_name == "list":
+            result = []
+            with open(path, "r", encoding="utf-8") as f:
+                for line in f:
+                    line = line.strip()
+                    if line:
+                        result.append(json.loads(line))
+            return result
         if type_name == "str":
             return path.read_text(encoding=kwargs.get("encoding", "utf-8"))
         raise ValueError(f"Unknown data type in metadata: {type_name}")
diff --git a/reme_ai/core/vector_store/chroma_vector_store.py b/reme_ai/core/vector_store/chroma_vector_store.py
index 7baa5eab..3a483c23 100644
--- a/reme_ai/core/vector_store/chroma_vector_store.py
+++ b/reme_ai/core/vector_store/chroma_vector_store.py
@@ -117,14 +117,33 @@ class ChromaVectorStore(BaseVectorStore):
 
     @staticmethod
     def _generate_where_clause(filters: dict | None) -> dict | None:
-        """Convert the universal filter format to a ChromaDB-compatible where clause."""
+        """Convert the universal filter format to a ChromaDB-compatible where clause.
+        
+        Supports two filter formats:
+        1. Range query: {"field": [start_value, end_value]} - filters for field >= start_value AND field <= end_value
+        2. Exact match: {"field": value} - filters for field == value
+        """
         if not filters:
             return None
 
-        def convert_condition(k: str, v: Any) -> dict | None:
-            """Convert a single filter condition to ChromaDB operator format."""
+        def convert_condition(k: str, v: Any) -> dict | list | None:
+            """Convert a single filter condition to ChromaDB operator format.
+            
+            Returns:
+                - dict for simple conditions
+                - list of dicts for range queries (which need to be wrapped in $and)
+                - None for wildcard filters
+            """
             if v == "*":
                 return None
+            # New syntax: [start, end] represents a range query
+            if isinstance(v, list) and len(v) == 2:
+                # Range query: field >= v[0] AND field <= v[1]
+                # ChromaDB requires separate conditions combined with $and
+                return [
+                    {k: {"$gte": v[0]}},
+                    {k: {"$lte": v[1]}}
+                ]
             if isinstance(v, dict):
                 chroma_condition = {}
                 for op, val in v.items():
@@ -141,8 +160,7 @@ class ChromaVectorStore(BaseVectorStore):
                     chroma_op = mapping.get(op, "$eq")
                     chroma_condition[k] = {chroma_op: val}
                 return chroma_condition
-            if isinstance(v, list):
-                return {k: {"$in": v}}
+            # Exact match for non-list values
             return {k: {"$eq": v}}
 
         processed_filters = []
@@ -155,7 +173,11 @@ class ChromaVectorStore(BaseVectorStore):
                     for sub_key, sub_value in condition.items():
                         converted = convert_condition(sub_key, sub_value)
                         if converted:
-                            or_condition.update(converted)
+                            if isinstance(converted, list):
+                                # Range query in OR condition - need to wrap in $and
+                                or_conditions.append({"$and": converted})
+                            else:
+                                or_condition.update(converted)
                     if or_condition:
                         or_conditions.append(or_condition)
                 if len(or_conditions) > 1:
@@ -168,13 +190,21 @@ class ChromaVectorStore(BaseVectorStore):
                     for sub_key, sub_value in condition.items():
                         converted = convert_condition(sub_key, sub_value)
                         if converted:
-                            processed_filters.append(converted)
+                            if isinstance(converted, list):
+                                # Range query - add each condition separately
+                                processed_filters.extend(converted)
+                            else:
+                                processed_filters.append(converted)
             elif key == "$not":
                 continue
             else:
                 converted = convert_condition(key, value)
                 if converted:
-                    processed_filters.append(converted)
+                    if isinstance(converted, list):
+                        # Range query - add each condition separately
+                        processed_filters.extend(converted)
+                    else:
+                        processed_filters.append(converted)
 
         if not processed_filters:
             return None
diff --git a/reme_ai/core/vector_store/es_vector_store.py b/reme_ai/core/vector_store/es_vector_store.py
index 16226749..39989277 100644
--- a/reme_ai/core/vector_store/es_vector_store.py
+++ b/reme_ai/core/vector_store/es_vector_store.py
@@ -262,9 +262,19 @@ class ESVectorStore(BaseVectorStore):
         if filters:
             filter_conditions = []
             for key, value in filters.items():
-                if isinstance(value, list):
-                    filter_conditions.append({"terms": {f"metadata.{key}": value}})
+                # New syntax: [start, end] represents a range query
+                if isinstance(value, list) and len(value) == 2:
+                    # Range query: field >= value[0] AND field <= value[1]
+                    filter_conditions.append({
+                        "range": {
+                            f"metadata.{key}": {
+                                "gte": value[0],
+                                "lte": value[1]
+                            }
+                        }
+                    })
                 else:
+                    # Exact match
                     filter_conditions.append({"term": {f"metadata.{key}": value}})
             search_query["knn"]["filter"] = {"bool": {"must": filter_conditions}}
 
@@ -448,9 +458,19 @@ class ESVectorStore(BaseVectorStore):
         if filters:
             filter_conditions = []
             for key, value in filters.items():
-                if isinstance(value, list):
-                    filter_conditions.append({"terms": {f"metadata.{key}": value}})
+                # New syntax: [start, end] represents a range query
+                if isinstance(value, list) and len(value) == 2:
+                    # Range query: field >= value[0] AND field <= value[1]
+                    filter_conditions.append({
+                        "range": {
+                            f"metadata.{key}": {
+                                "gte": value[0],
+                                "lte": value[1]
+                            }
+                        }
+                    })
                 else:
+                    # Exact match
                     filter_conditions.append({"term": {f"metadata.{key}": value}})
             query["query"] = {"bool": {"must": filter_conditions}}
 
diff --git a/reme_ai/core/vector_store/local_vector_store.py b/reme_ai/core/vector_store/local_vector_store.py
index cce3cae2..cfeec74e 100644
--- a/reme_ai/core/vector_store/local_vector_store.py
+++ b/reme_ai/core/vector_store/local_vector_store.py
@@ -91,17 +91,32 @@ class LocalVectorStore(BaseVectorStore):
 
     @staticmethod
     def _match_filters(node: VectorNode, filters: dict | None) -> bool:
-        """Check if a vector node matches the provided metadata filters."""
+        """Check if a vector node matches the provided metadata filters.
+        
+        Supports two filter formats:
+        1. Range query: {"field": [start_value, end_value]} - filters for field >= start_value AND field <= end_value
+        2. Exact match: {"field": value} - filters for field == value
+        """
         if not filters:
             return True
 
         for key, value in filters.items():
             node_value = node.metadata.get(key)
 
-            if isinstance(value, list):
-                if node_value not in value:
+            # New syntax: [start, end] represents a range query
+            if isinstance(value, list) and len(value) == 2:
+                # Range query: field >= value[0] AND field <= value[1]
+                if node_value is None:
+                    return False
+                try:
+                    # Try numeric comparison
+                    if not (value[0] <= node_value <= value[1]):
+                        return False
+                except TypeError:
+                    # If comparison fails, the filter doesn't match
                     return False
             else:
+                # Exact match
                 if node_value != value:
                     return False
 
diff --git a/reme_ai/core/vector_store/pgvector_store.py b/reme_ai/core/vector_store/pgvector_store.py
index a23c84b9..576d8e6c 100644
--- a/reme_ai/core/vector_store/pgvector_store.py
+++ b/reme_ai/core/vector_store/pgvector_store.py
@@ -1,6 +1,7 @@
 """PostgreSQL pgvector implementation for vector storage and retrieval."""
 
 import json
+import re
 from typing import Any
 
 from loguru import logger
@@ -25,6 +26,25 @@ except ImportError as e:
 class PGVectorStore(BaseVectorStore):
     """Vector store implementation using PostgreSQL and pgvector for efficient similarity search."""
 
+    @staticmethod
+    def _validate_table_name(name: str) -> None:
+        """Validate table name to prevent SQL injection.
+        
+        PostgreSQL table names must:
+        - Contain only alphanumeric characters and underscores
+        - Not start with a digit
+        - Be between 1 and 63 characters
+        """
+        if not name:
+            raise ValueError("Table name cannot be empty")
+        if len(name) > 63:
+            raise ValueError(f"Table name too long: {len(name)} characters (max 63)")
+        if not re.match(r'^[a-zA-Z_][a-zA-Z0-9_]*$', name):
+            raise ValueError(
+                f"Invalid table name: {name}. Must start with letter or underscore, "
+                "and contain only alphanumeric characters and underscores."
+            )
+
     def __init__(
         self,
         collection_name: str,
@@ -47,6 +67,9 @@ class PGVectorStore(BaseVectorStore):
                 "PGVector requires extra dependencies. Install with `pip install asyncpg pgvector`",
             ) from _ASYNCPG_IMPORT_ERROR
 
+        # Validate collection name to prevent SQL injection
+        self._validate_table_name(collection_name)
+
         super().__init__(collection_name=collection_name, embedding_model=embedding_model, **kwargs)
 
         self.dsn = dsn
@@ -106,6 +129,7 @@ class PGVectorStore(BaseVectorStore):
 
     async def create_collection(self, collection_name: str, **kwargs):
         """Create a new PostgreSQL table with vector support and appropriate indexing."""
+        self._validate_table_name(collection_name)
         pool = await self._get_pool()
         dimensions = kwargs.get("dimensions", self.embedding_model_dims)
 
@@ -150,6 +174,7 @@ class PGVectorStore(BaseVectorStore):
 
     async def delete_collection(self, collection_name: str, **kwargs):
         """Remove the specified collection table from the database."""
+        self._validate_table_name(collection_name)
         pool = await self._get_pool()
         async with pool.acquire() as conn:
             await conn.execute(f"DROP TABLE IF EXISTS {collection_name}")
@@ -157,6 +182,7 @@ class PGVectorStore(BaseVectorStore):
 
     async def copy_collection(self, collection_name: str, **kwargs):
         """Duplicate the structure and content of the current collection to a new table."""
+        self._validate_table_name(collection_name)
         pool = await self._get_pool()
 
         async with pool.acquire() as conn:
@@ -252,7 +278,14 @@ class PGVectorStore(BaseVectorStore):
 
     @staticmethod
     def _build_filter_clause(filters: dict | None) -> tuple[str, list]:
-        """Generate an SQL WHERE clause and parameter list from a filter dictionary."""
+        """Generate an SQL WHERE clause and parameter list from a filter dictionary.
+        
+        Supports two filter formats:
+        1. Range query: {"field": [start_value, end_value]} - filters for field >= start_value AND field <= end_value
+        2. Exact match: {"field": value} - filters for field == value
+        
+        Range queries support both numeric and string (e.g., timestamp strings) comparisons.
+        """
         if not filters:
             return "", []
 
@@ -261,12 +294,28 @@ class PGVectorStore(BaseVectorStore):
         param_idx = 1
 
         for key, value in filters.items():
-            if isinstance(value, list):
-                placeholders = ", ".join([f"${param_idx + i}" for i in range(len(value))])
-                conditions.append(f"metadata->>'{key}' IN ({placeholders})")
-                params.extend([str(v) for v in value])
-                param_idx += len(value)
+            # Sanitize key to prevent SQL injection (only allow alphanumeric and underscore)
+            if not key.replace('_', '').replace('.', '').isalnum():
+                raise ValueError(f"Invalid metadata key: {key}. Only alphanumeric characters, underscore and dot are allowed.")
+            
+            # New syntax: [start, end] represents a range query
+            if isinstance(value, list) and len(value) == 2:
+                # Range query: field >= value[0] AND field <= value[1]
+                # Try numeric comparison first, fall back to text comparison if needed
+                if isinstance(value[0], (int, float)) and isinstance(value[1], (int, float)):
+                    # Numeric range query
+                    conditions.append(
+                        f"(metadata->>'{key}')::numeric >= ${param_idx} AND (metadata->>'{key}')::numeric <= ${param_idx + 1}"
+                    )
+                else:
+                    # Text range query (works for strings, timestamps, etc.)
+                    conditions.append(
+                        f"metadata->>'{key}' >= ${param_idx} AND metadata->>'{key}' <= ${param_idx + 1}"
+                    )
+                params.extend([value[0], value[1]])
+                param_idx += 2
             else:
+                # Exact match
                 conditions.append(f"metadata->>'{key}' = ${param_idx}")
                 params.append(str(value))
                 param_idx += 1
@@ -290,11 +339,14 @@ class PGVectorStore(BaseVectorStore):
 
         filter_clause, filter_params = self._build_filter_clause(filters)
 
+        # Adjust parameter indices in filter clause to account for $1 being used by vector_str
         if filter_clause:
-            for i in range(len(filter_params)):
-                old_idx = i + 1
-                new_idx = i + 2
-                filter_clause = filter_clause.replace(f"${old_idx}", f"${new_idx}", 1)
+            # Replace from highest index to lowest to avoid conflicts
+            for i in range(len(filter_params), 0, -1):
+                old_placeholder = f"${i}"
+                new_placeholder = f"${i + 1}"
+                # Use word boundary to ensure we only replace exact matches (e.g., $1 not $10)
+                filter_clause = re.sub(rf'\${i}\b', new_placeholder, filter_clause)
 
         async with pool.acquire() as conn:
             sql = f"""
diff --git a/reme_ai/core/vector_store/qdrant_vector_store.py b/reme_ai/core/vector_store/qdrant_vector_store.py
index 1ac4db64..5d9fa4f5 100644
--- a/reme_ai/core/vector_store/qdrant_vector_store.py
+++ b/reme_ai/core/vector_store/qdrant_vector_store.py
@@ -246,29 +246,65 @@ class QdrantVectorStore(BaseVectorStore):
 
     @staticmethod
     def _create_filter(filters: dict) -> Filter | None:
-        """Convert a dictionary of filter conditions into a Qdrant Filter object."""
+        """Convert a dictionary of filter conditions into a Qdrant Filter object.
+        
+        Supports two filter formats:
+        1. Range query: {"field": [start_value, end_value]} - filters for field >= start_value AND field <= end_value
+        2. Exact match: {"field": value} - filters for field == value
+        """
         if not filters:
             return None
 
         conditions = []
         for key, value in filters.items():
-            if isinstance(value, dict) and ("gte" in value or "lte" in value):
+            # New syntax: [start, end] represents a range query
+            if isinstance(value, list) and len(value) == 2:
+                # Range query: field >= value[0] AND field <= value[1]
+                # Qdrant's Range only supports numeric values
+                if isinstance(value[0], (int, float)) and isinstance(value[1], (int, float)):
+                    conditions.append(
+                        FieldCondition(
+                            key=f"metadata.{key}",
+                            range=Range(gte=value[0], lte=value[1]),
+                        ),
+                    )
+                else:
+                    # For non-numeric values (e.g., string dates), Qdrant doesn't support range queries
+                    # We need to skip this filter with a warning
+                    logger.warning(
+                        f"Qdrant does not support range queries for non-numeric values. "
+                        f"Skipping range filter for key '{key}' with values {value}. "
+                        f"Consider using numeric timestamps instead."
+                    )
+            elif isinstance(value, dict) and ("gte" in value or "lte" in value):
                 range_params = {}
+                # Check if values are numeric
                 if "gte" in value:
-                    range_params["gte"] = value["gte"]
+                    if isinstance(value["gte"], (int, float)):
+                        range_params["gte"] = value["gte"]
+                    else:
+                        logger.warning(
+                            f"Qdrant range filter for key '{key}' requires numeric gte value, got {type(value['gte']).__name__}. Skipping."
+                        )
+                        continue
                 if "lte" in value:
-                    range_params["lte"] = value["lte"]
-                conditions.append(
-                    FieldCondition(
-                        key=f"metadata.{key}",
-                        range=Range(**range_params),
-                    ),
-                )
-            elif isinstance(value, list):
-                conditions.append(
-                    FieldCondition(key=f"metadata.{key}", match=MatchValue(value=value[0])),
-                )
+                    if isinstance(value["lte"], (int, float)):
+                        range_params["lte"] = value["lte"]
+                    else:
+                        logger.warning(
+                            f"Qdrant range filter for key '{key}' requires numeric lte value, got {type(value['lte']).__name__}. Skipping."
+                        )
+                        continue
+                
+                if range_params:  # Only add condition if we have valid numeric parameters
+                    conditions.append(
+                        FieldCondition(
+                            key=f"metadata.{key}",
+                            range=Range(**range_params),
+                        ),
+                    )
             else:
+                # Exact match
                 conditions.append(
                     FieldCondition(key=f"metadata.{key}", match=MatchValue(value=value)),
                 )
diff --git a/reme_ai/mem_agent/v3/__init__.py b/reme_ai/mem_agent/v3/__init__.py
new file mode 100644
index 00000000..0fd9c86d
--- /dev/null
+++ b/reme_ai/mem_agent/v3/__init__.py
@@ -0,0 +1,9 @@
+from .personal_summarizer_v3 import PersonalSummarizerV3
+from .reme_retriever_v3 import ReMeRetrieverV3
+from .reme_summarizer_v3 import ReMeSummarizerV3
+
+__all__ = [
+    "PersonalSummarizerV3",
+    "ReMeRetrieverV3",
+    "ReMeSummarizerV3",
+]
diff --git a/reme_ai/mem_agent/v3/personal_summarizer_v3.py b/reme_ai/mem_agent/v3/personal_summarizer_v3.py
new file mode 100644
index 00000000..0093884d
--- /dev/null
+++ b/reme_ai/mem_agent/v3/personal_summarizer_v3.py
@@ -0,0 +1,69 @@
+from ..base_memory_agent import BaseMemoryAgent
+from ...core.enumeration import Role, MemoryType
+from ...core.schema import Message, ToolCall
+from ...core.utils import format_messages
+
+
+class PersonalSummarizerV3(BaseMemoryAgent):
+    memory_type: MemoryType = MemoryType.PERSONAL
+
+    def _build_tool_call(self) -> ToolCall:
+        return ToolCall(
+            **{
+                "description": self.get_prompt("tool"),
+                "parameters": {
+                    "type": "object",
+                    "properties": {
+                        "messages": {
+                            "type": "array",
+                            "items": {
+                                "type": "object",
+                                "properties": {
+                                    "role": {
+                                        "type": "string",
+                                        "description": "role",
+                                    },
+                                    "content": {
+                                        "type": "string",
+                                        "description": "content",
+                                    },
+                                },
+                                "required": ["role", "content"],
+                            },
+                        },
+                    },
+                    "required": ["messages"],
+                },
+            },
+        )
+
+    async def build_messages(self) -> list[Message]:
+        """Construct messages with context, memory_target, and memory_type information."""
+        system_prompt = self.prompt_format(
+            prompt_name="system_prompt",
+            context=self.description + "\n" + format_messages(self.get_messages()),
+            memory_type=self.memory_type.value,
+            memory_target=self.memory_target,
+        )
+
+        messages = [
+            Message(role=Role.SYSTEM, content=system_prompt),
+            Message(role=Role.USER, content=self.get_prompt("user_message")),
+        ]
+        return messages
+
+    async def _reasoning_step(self, messages: list[Message], step: int, **kwargs) -> tuple[Message, bool]:
+        return await super()._reasoning_step(messages, step, **kwargs)
+
+    async def _acting_step(self, assistant_message: Message, step: int, **kwargs) -> list[Message]:
+        """Execute tool calls with memory_target, memory_type, and author context."""
+        messages: list[Message] = await super()._acting_step(
+            assistant_message,
+            step,
+            memory_type=self.memory_type.value,
+            memory_target=self.memory_target,
+            ref_memory_id=self.ref_memory_id,
+            author=self.author,
+            **kwargs,
+        )
+        return messages
diff --git a/reme_ai/mem_agent/v3/personal_summarizer_v3.yaml b/reme_ai/mem_agent/v3/personal_summarizer_v3.yaml
new file mode 100644
index 00000000..97d18afc
--- /dev/null
+++ b/reme_ai/mem_agent/v3/personal_summarizer_v3.yaml
@@ -0,0 +1,38 @@
+tool: |
+  Extract and update personal memories about the user from conversation context.
+  Analyze dialogues to identify preferences, habits, background, relationships, and key facts.
+
+system_prompt: |
+  You are a memory agent managing **{memory_type}** memories about **{memory_target}**.
+
+  ## Latest Conversation:
+  {context}
+
+  Each message format: `round<index> [<timestamp>] <role/name>: <content>` (timestamp: YYYY-MM-DD HH:MM:SS).
+
+  **CRITICAL**: Extract ONLY explicitly stated information. DO NOT infer, assume, or fabricate.
+
+  ## Three-Step Workflow
+
+  ### Step 1: Extract Conversation Memories
+  Use `AddMemory` to extract key personal facts from the conversation.
+  - Extract: preferences, habits, status, personal details, decisions, conclusions
+  - Keep entries concise and distinct (no duplicates, no omissions)
+  - Record `conversation_time` for each memory (format: 2020-01-01 00:00:00; use 0000-00-00 00:00:00 if unavailable)
+
+  ### Step 2: Read User Profile
+  Use `ReadUserProfile` to retrieve the current user profile.
+  - Review existing memories to identify conflicts and duplicates
+
+  ### Step 3: Update User Profile
+  Use `UpdateUserProfile` to synchronize the profile with new information.
+  - `profile_ids_to_delete`: Remove outdated or conflicting profiles
+  - `profiles_to_add`: Add new profiles that are not duplicates
+  - Use `timestamp` from conversation_time (format: 2020-01-01 00:00:00)
+  - Keep final profiles concise with no information loss
+
+user_message: |
+  Execute the three-step workflow:
+  1. Use `AddMemory` to extract personal memories from the conversation
+  2. Use `ReadUserProfile` to read existing user profile
+  3. Use `UpdateUserProfile` to remove outdated entries and add new profiles
diff --git a/reme_ai/mem_agent/v3/reme_retriever_v3.py b/reme_ai/mem_agent/v3/reme_retriever_v3.py
new file mode 100644
index 00000000..8f5c62dc
--- /dev/null
+++ b/reme_ai/mem_agent/v3/reme_retriever_v3.py
@@ -0,0 +1,44 @@
+"""ReMe retriever v2 that autonomously retrieves memories from multiple angles."""
+
+from typing import List
+
+from ..base_memory_agent import BaseMemoryAgent
+from ...core.enumeration import Role
+from ...core.schema import Message
+from ...core.utils import format_messages
+
+
+class ReMeRetrieverV3(BaseMemoryAgent):
+
+    def __init__(self, meta_memories: list[dict] | None = None, **kwargs):
+        super().__init__(**kwargs)
+        self.meta_memories: list[dict] = meta_memories or []
+
+    async def _read_meta_memories(self) -> str:
+        """Fetch all meta-memory entries that define specialized memory agents."""
+        from ...mem_tool import ReadMetaMemory
+
+        op = ReadMetaMemory(enable_identity_memory=False)
+        return op.format_memory_metadata(self.meta_memories)
+
+    async def build_messages(self) -> List[Message]:
+        """Build messages with system prompt and user message."""
+        if self.context.get("query"):
+            context = self.context.query
+        elif self.context.get("messages"):
+            context = format_messages(self.context.messages)
+        else:
+            raise ValueError("input must have either `query` or `messages`")
+
+        system_prompt = self.prompt_format(
+            prompt_name="system_prompt",
+            meta_memory_info=await self._read_meta_memories(),
+            context=context,
+        )
+
+        messages = [
+            Message(role=Role.SYSTEM, content=system_prompt),
+            Message(role=Role.USER, content=self.get_prompt("user_message")),
+        ]
+
+        return messages
diff --git a/reme_ai/mem_agent/v3/reme_retriever_v3.yaml b/reme_ai/mem_agent/v3/reme_retriever_v3.yaml
new file mode 100644
index 00000000..8ff005ee
--- /dev/null
+++ b/reme_ai/mem_agent/v3/reme_retriever_v3.yaml
@@ -0,0 +1,53 @@
+tool: |
+  Autonomously retrieve relevant memories through a three-step strategy to answer user questions.
+  Steps: read user profile → vector search with multiple angles → read original conversations.
+  State "I don't know" if information cannot be found after exhaustive searching.
+  NEVER hallucinate or fabricate information not present in retrieved memories.
+
+system_prompt: |
+  You are a memory retrieval agent. Search for relevant memories to answer the user's question following this strategy:
+
+  ## Available Meta Memories
+  Format: "- <memory_type>(<memory_target>): <description>"
+  {meta_memory_info}
+
+  ## User Context
+  {context}
+
+  ## Three-Step Retrieval Strategy
+
+  **STEP 1: Read User Profile (REQUIRED FIRST)**
+  - Use `read_user_profile` with memory_type and memory_target from available meta memories
+  - Check if the user profile directly answers the question
+  - If sufficient information found, provide the answer and STOP
+
+  **STEP 2: Vector Search (If Step 1 insufficient)**
+  - Use `retrieve_memory` with memory_type, memory_target, and query
+  - Try multiple retrieval angles (at least 3 different attempts):
+    * Direct query with user's question
+    * Reformulated queries with different phrasing/keywords
+    * Queries focused on specific entities or concepts
+  
+  - **Time Range Filtering** (when applicable):
+    * Format: [start_date, end_date] in YYYYMMDD format
+    * Example: [20200101, 20200102] means 20200101 < time < 20200102
+    * Single-sided: [0, 20200102] for before, [20200101, 99999999] for after
+    * If no results, try broader time ranges or remove time constraints
+  
+  - If no results after multiple attempts, try different memory_type/memory_target combinations
+
+  **STEP 3: Read Original Conversations (If Step 2 insufficient)**
+  - Use `read_history` with history_id from retrieved memories
+  - Prioritize reading:
+    * Most recent memories with history_id
+    * Most relevant memories from Step 2 with history_id
+  - Try multiple history_id entries if needed
+
+  ## Response Rules
+  - Answer ONLY based on retrieved information - NEVER guess or fabricate
+  - If nothing found after all three steps: State clearly "I don't know. I cannot find relevant information to answer this question."
+  - Be persistent: try multiple angles in each step before moving to the next
+  - Once you find sufficient information, provide a direct answer
+
+user_message: |
+  Retrieve relevant memories and answer the question using the three-step strategy.
diff --git a/reme_ai/mem_agent/v3/reme_summarizer_v3.py b/reme_ai/mem_agent/v3/reme_summarizer_v3.py
new file mode 100644
index 00000000..a0f466b9
--- /dev/null
+++ b/reme_ai/mem_agent/v3/reme_summarizer_v3.py
@@ -0,0 +1,88 @@
+from loguru import logger
+
+from ..base_memory_agent import BaseMemoryAgent
+from ...core.enumeration import Role, MemoryType
+from ...core.schema import Message, MemoryNode, ToolCall
+from ...core.utils import format_messages
+
+
+class ReMeSummarizerV3(BaseMemoryAgent):
+
+    def __init__(self, meta_memories: list[dict] | None = None, **kwargs):
+        """Initialize with meta memories list."""
+        super().__init__(**kwargs)
+        self.meta_memories: list[dict] = meta_memories or []
+
+    def _build_tool_call(self) -> ToolCall:
+        return ToolCall(
+            **{
+                "description": self.get_prompt("tool"),
+                "parameters": {
+                    "type": "object",
+                    "properties": {
+                        "messages": {
+                            "type": "array",
+                            "items": {
+                                "type": "object",
+                                "properties": {
+                                    "role": {
+                                        "type": "string",
+                                        "description": "role",
+                                    },
+                                    "content": {
+                                        "type": "string",
+                                        "description": "content",
+                                    },
+                                },
+                                "required": ["role", "content"],
+                            },
+                        },
+                    },
+                    "required": ["messages"],
+                },
+            },
+        )
+
+    async def _read_meta_memories(self) -> str:
+        from ...mem_tool import ReadMetaMemory
+
+        return ReadMetaMemory().format_memory_metadata(self.meta_memories)
+
+    async def build_messages(self) -> list[Message]:
+        """Construct initial messages with context and meta-memory information."""
+        messages = [Message(**m) if isinstance(m, dict) else m for m in self.context.messages]
+        self.context["messages_formated"] = self.description + "\n" + format_messages(messages)
+        self.context["ref_memory_id"] = MemoryNode(
+            memory_type=MemoryType.HISTORY,
+            content=self.context["messages_formated"],
+        ).memory_id
+
+        meta_memory_info = await self._read_meta_memories()
+        logger.info(f"meta_memory_info={meta_memory_info}")
+
+        system_prompt = self.prompt_format(
+            prompt_name="system_prompt",
+            meta_memory_info=meta_memory_info,
+            context=self.context["messages_formated"],
+        )
+
+        user_message = self.get_prompt("user_message")
+        messages = [
+            Message(role=Role.SYSTEM, content=system_prompt),
+            Message(role=Role.USER, content=user_message),
+        ]
+
+        return messages
+
+    async def _acting_step(self, assistant_message: Message, step: int, **kwargs) -> list[Message]:
+        """Execute tool calls with ref_memory_id and author context."""
+        return await super()._acting_step(
+            assistant_message,
+            step,
+            messages=self.context.get("messages", []),
+            description=self.context.get("description"),
+            ref_memory_id=self.context["ref_memory_id"],
+            messages_formated=self.context["messages_formated"],
+            author=self.author,
+            **kwargs,
+        )
diff --git a/reme_ai/mem_agent/v3/reme_summarizer_v3.yaml b/reme_ai/mem_agent/v3/reme_summarizer_v3.yaml
new file mode 100644
index 00000000..30792a08
--- /dev/null
+++ b/reme_ai/mem_agent/v3/reme_summarizer_v3.yaml
@@ -0,0 +1,25 @@
+tool: |
+  Orchestrate the complete memory summarization for the agent.
+
+system_prompt: |
+  You are a Memory Agent responsible for performing necessary updates and summaries of the main Agent's memories based on the **context**.
+
+  # Context
+  {context}
+
+  ## Main Agent's Meta Memory
+  Each line of meta memory indicates the existence of a specialized Memory Agent dedicated to deep summarization and updating of memories within a specific dimension (memory_type + memory_target).
+  Format: "- <memory_type>(<memory_target>): <description>"
+  {meta_memory_info}
+
+  ## Your Task
+  Use `summary_and_hands_off` tool to:
+  1. Create a concise summary in `summary_content` that captures key points, decisions, or important facts from the context.
+  2. Identify which memory dimensions need updates and specify them in `memory_tasks` (each with `memory_type` and `memory_target`).
+     - The `memory_type` and `memory_target` must exactly match existing entries in the "Main Agent's Meta Memory" listed above.
+     - Multiple tasks can be specified to enable parallel processing by specialized agents.
+  
+  Note: If the context contains no memorable information (e.g., simple greetings), output `<NO_MEMORY_NEEDED>`.
+
+user_message: |
+  Please perform your task based on the context.
diff --git a/reme_ai/mem_tool/base_memory_tool.py b/reme_ai/mem_tool/base_memory_tool.py
index 6accfe2a..0d92671c 100644
--- a/reme_ai/mem_tool/base_memory_tool.py
+++ b/reme_ai/mem_tool/base_memory_tool.py
@@ -3,8 +3,6 @@
 from abc import ABCMeta
 from pathlib import Path
 
-from loguru import logger
-
 from ..core.enumeration import MemoryType
 from ..core.op import BaseOp
 from ..core.schema import ToolCall, MemoryNode
diff --git a/reme_ai/mem_tool/read_local_memories.py b/reme_ai/mem_tool/read_local_memories.py
new file mode 100644
index 00000000..98d96187
--- /dev/null
+++ b/reme_ai/mem_tool/read_local_memories.py
@@ -0,0 +1,54 @@
+from loguru import logger
+
+from ..base_memory_tool import BaseMemoryTool
+from ...core.context import C
+from ...core.schema.memory_node import MemoryNode
+
+
+@C.register_op()
+class ReadLocalMemories(BaseMemoryTool):
+
+    def __init__(self, **kwargs):
+        kwargs["enable_multiple"] = False
+        super().__init__(**kwargs)
+
+    def _build_parameters(self) -> dict:
+        return {
+            "type": "object",
+            "properties": {
+                "memory_type": {
+                    "type": "string",
+                    "description": self.get_prompt("memory_type"),
+                },
+                "memory_target": {
+                    "type": "string",
+                    "description": self.get_prompt("memory_target"),
+                },
+            },
+            "required": ["memory_type", "memory_target"],
+        }
+
+    async def execute(self):
+        memory_type = self.context.get("memory_type", "")
+        memory_target = self.context.get("memory_target", "")
+
+        if not memory_type or not memory_target:
+            self.output = "memory_type and memory_target are required."
+            return
+
+        cache_key = f"{memory_type}_{memory_target}"
+        cached_data = self.meta_memory.load(cache_key, auto_clean=False)
+        
+        if not cached_data:
+            self.output = f"Local memory not found: {memory_type}_{memory_target}"
+            logger.info(self.output)
+            return
+
+        memory_nodes = [MemoryNode(**node_data) for node_data in cached_data]
+
+        if not memory_nodes:
+            self.output = f"No valid memory nodes found in {memory_type}_{memory_target}"
+            return
+
+        self.output = memory_nodes
+        logger.info(f"Read {len(memory_nodes)} nodes from cache key: {cache_key}")
diff --git a/reme_ai/mem_tool/read_local_memories.yaml b/reme_ai/mem_tool/read_local_memories.yaml
new file mode 100644
index 00000000..c8e155f6
--- /dev/null
+++ b/reme_ai/mem_tool/read_local_memories.yaml
@@ -0,0 +1,8 @@
+tool: |
+  Read memory nodes from local memory files.
+
+memory_type: |
+  The type of local memory to read.
+
+memory_target: |
+  The target identifier for the local memory.
diff --git a/reme_ai/mem_tool/v3/__init__.py b/reme_ai/mem_tool/v3/__init__.py
new file mode 100644
index 00000000..9d06f4c8
--- /dev/null
+++ b/reme_ai/mem_tool/v3/__init__.py
@@ -0,0 +1,15 @@
+from .add_memory import AddMemory
+from .read_history import ReadHistory
+from .read_user_profile import ReadUserProfile
+from .retrieve_memory import RetrieveMemory
+from .summary_and_hands_off import SummaryAndHandsOff
+from .update_user_profile import UpdateUserProfile
+
+__all__ = [
+    "AddMemory",
+    "ReadHistory",
+    "ReadUserProfile",
+    "RetrieveMemory",
+    "SummaryAndHandsOff",
+    "UpdateUserProfile",
+]
diff --git a/reme_ai/mem_tool/v3/add_memory.py b/reme_ai/mem_tool/v3/add_memory.py
new file mode 100644
index 00000000..a013db42
--- /dev/null
+++ b/reme_ai/mem_tool/v3/add_memory.py
@@ -0,0 +1,67 @@
+from loguru import logger
+
+from ..base_memory_tool import BaseMemoryTool
+from ...core.schema import MemoryNode
+
+
+class AddMemory(BaseMemoryTool):
+
+    def __init__(self, **kwargs):
+        kwargs['enable_multiple'] = True
+        super().__init__(**kwargs)
+
+    def _build_tool_description(self) -> str:
+        return "Add multiple memories to the vector store for future retrieval."
+
+    def _build_multiple_parameters(self) -> dict:
+        return {
+            "type": "object",
+            "properties": {
+                "memories": {
+                    "type": "array",
+                    "description": "A list of memory objects to store.",
+                    "items": {
+                        "type": "object",
+                        "properties": {
+                            "memory_content": {
+                                "type": "string",
+                                "description": "memory content",
+                            },
+                            "conversation_time": {
+                                "type": "object",
+                                "description": "conversation time, e.g. '2020-01-01 00:00:00'",
+                            }
+                        },
+                        "required": ["memory_content", "conversation_time"],
+                    },
+                },
+            },
+            "required": ["memories"],
+        }
+
+    async def execute(self):
+        memories: list[dict] = self.context.get("memories", [])
+        if not memories:
+            self.output = "No memories provided for addition."
+            return
+
+        memory_nodes: list[MemoryNode] = []
+        for mem in memories:
+            memory_content = mem.get("memory_content", "")
+            conversation_time = mem.get("conversation_time", "")
+            metadata: dict = {"conversation_time": conversation_time}
+            try:
+                metadata["time_int"] = int(conversation_time.split(" ")[0].replace("-", ""))
+            except Exception:
+                ...
+            memory_nodes.append(self._build_memory_node(memory_content, metadata=metadata))
+
+        vector_nodes = [node.to_vector_node() for node in memory_nodes]
+        vector_ids: list[str] = [node.vector_id for node in vector_nodes]
+
+        await self.vector_store.delete(vector_ids=vector_ids)
+        await self.vector_store.insert(nodes=vector_nodes)
+        self.memory_nodes = memory_nodes
+
+        self.output = f"Successfully added {len(memory_nodes)} memories to vector_store."
+        logger.info(self.output)
diff --git a/reme_ai/mem_tool/v3/read_history.py b/reme_ai/mem_tool/v3/read_history.py
new file mode 100644
index 00000000..e9ab2a15
--- /dev/null
+++ b/reme_ai/mem_tool/v3/read_history.py
@@ -0,0 +1,38 @@
+from loguru import logger
+
+from ..base_memory_tool import BaseMemoryTool
+from ...core.schema import MemoryNode
+
+
+class ReadHistory(BaseMemoryTool):
+    def __init__(self, **kwargs):
+        kwargs["enable_multiple"] = False
+        super().__init__(**kwargs)
+
+    def _build_tool_description(self) -> str:
+        return "Read original history dialogue."
+
+    def _build_parameters(self) -> dict:
+        return {
+            "type": "object",
+            "properties": {
+                "history_id": {
+                    "type": "string",
+                    "description": "history_id",
+                },
+            },
+            "required": ["history_id"],
+        }
+
+    async def execute(self):
+        history_id = self.context.get("history_id", "")
+        nodes = await self.vector_store.get(vector_ids=[history_id])
+
+        if not nodes:
+            self.output = f"No history: {history_id}"
+            logger.warning(self.output)
+            return
+
+        memory = MemoryNode.from_vector_node(nodes[0])
+        self.output = memory.content
+        logger.info(f"Successfully read history memory: {history_id}")
diff --git a/reme_ai/mem_tool/v3/read_user_profile.py b/reme_ai/mem_tool/v3/read_user_profile.py
new file mode 100644
index 00000000..57cff042
--- /dev/null
+++ b/reme_ai/mem_tool/v3/read_user_profile.py
@@ -0,0 +1,65 @@
+from loguru import logger
+
+from ..base_memory_tool import BaseMemoryTool
+from ...core.schema.memory_node import MemoryNode
+
+
+class ReadUserProfile(BaseMemoryTool):
+
+    def __init__(self, add_memory_type_target: bool = True, **kwargs):
+        kwargs["enable_multiple"] = False
+        self.add_memory_type_target = add_memory_type_target
+        super().__init__(**kwargs)
+
+    def _build_tool_description(self) -> str:
+        return "Read personal memory profile for the current user."
+
+    def _build_parameters(self) -> dict:
+        if self.add_memory_type_target:
+            return {
+                "type": "object",
+                "properties": {
+                    "memory_type": {
+                        "type": "string",
+                        "description": "memory_type",
+                    },
+                    "memory_target": {
+                        "type": "string",
+                        "description": "memory_target",
+                    },
+                },
+                "required": ["memory_type", "memory_target"],
+            }
+        else:
+            return {
+                "type": "object",
+                "properties": {},
+                "required": [],
+            }
+
+    async def execute(self):
+        cache_key = f"{self.memory_type}_{self.memory_target}"
+        cached_data = self.meta_memory.load(cache_key, auto_clean=False)
+
+        if not cached_data:
+            self.output = f"Local memory not found: {self.memory_type}_{self.memory_target}"
+            logger.info(self.output)
+            return
+
+        # Convert to MemoryNode objects and sort by conversation_time (oldest first)
+        memory_nodes = [MemoryNode(**node_data) for node_data in cached_data]
+        memory_nodes.sort(
+            key=lambda node: node.metadata.get("conversation_time", "")
+        )
+
+        memory_formated = []
+        for node in memory_nodes:
+            node_formated = f"profile_id={node.memory_id} profile_content={node.content}"
+            if "conversation_time" in node.metadata:
+                node_formated += f" conversation_time={node.metadata['conversation_time']}"
+            if node.ref_memory_id:
+                node_formated += f" history_id={node.ref_memory_id}"
+            memory_formated.append(node_formated.strip())
+
+        self.output = "\n".join(memory_formated)
+        logger.info(f"Read {len(memory_formated)} nodes from cache key: {cache_key}")
diff --git a/reme_ai/mem_tool/v3/retrieve_memory.py b/reme_ai/mem_tool/v3/retrieve_memory.py
new file mode 100644
index 00000000..32e526d7
--- /dev/null
+++ b/reme_ai/mem_tool/v3/retrieve_memory.py
@@ -0,0 +1,84 @@
+import json
+
+from loguru import logger
+
+from ..base_memory_tool import BaseMemoryTool
+from ...core.schema import MemoryNode
+from ...core.utils import deduplicate_memories
+
+
+class RetrieveMemory(BaseMemoryTool):
+
+    def __init__(self, top_k: int = 20, **kwargs):
+        super().__init__(**kwargs)
+        self.top_k: int = top_k
+
+    def _build_tool_description(self) -> str:
+        return "Retrieve memories using vector similarity search."
+
+    def _build_multiple_parameters(self) -> dict:
+        return {
+            "type": "object",
+            "properties": {
+                "query_items": {
+                    "type": "array",
+                    "description": "query_items",
+                    "items": {
+                        "type": "object",
+                        "properties": {
+                            "memory_type": {
+                                "type": "string",
+                                "description": "memory_type",
+                            },
+                            "memory_target": {
+                                "type": "string",
+                                "description": "memory_target",
+                            },
+                            "query": {
+                                "type": "string",
+                                "description": "query",
+                            },
+                            "time_range": {
+                                "type": "string",
+                                "description": "time_range(optional), e.g. [20200101, 20200101]",
+                            },
+                        },
+                        "required": ["memory_type", "memory_target", "query"],
+                    },
+                },
+            },
+            "required": ["query_items"],
+        }
+
+    async def execute(self):
+        query_items: list[dict] = self.context.get("query_items", [])
+        memory_nodes: list[MemoryNode] = []
+        for query_item in query_items:
+            memory_type = query_item.get("memory_type")
+            memory_target = query_item.get("memory_target")
+            query = query_item.get("query")
+            time_range = query_item.get("time_range", "")
+
+            filter_dict = {
+                "memory_type": memory_type,
+                "memory_target": memory_target,
+            }
+
+            if time_range:
+                time_range = json.loads(time_range)
+                filter_dict["time_range"] = [int(time_range[0]), int(time_range[1])]
+
+            nodes = await self.vector_store.search(query=query, limit=self.top_k, filters=filter_dict)
+            memory_nodes.extend([MemoryNode.from_vector_node(n) for n in nodes])
+        memory_nodes = deduplicate_memories(memory_nodes)
+
+        retrieved_memory_ids = {node.memory_id for node in self.retrieved_nodes if node.memory_id}
+        new_memory_nodes = [node for node in memory_nodes if node.memory_id not in retrieved_memory_ids]
+        self.retrieved_nodes.extend(new_memory_nodes)
+        self.memory_nodes = new_memory_nodes
+
+        if not new_memory_nodes:
+            self.output = "No new memory_nodes found matching the query (duplicates removed)."
+        else:
+            self.output = "\n".join([f"{m.metadata['conversation_time']} {m.content}" for m in new_memory_nodes])
+        logger.info(f"Retrieved {len(memory_nodes)} memory_nodes, {len(new_memory_nodes)} new after deduplication")
diff --git a/reme_ai/mem_tool/v3/summary_and_hands_off.py b/reme_ai/mem_tool/v3/summary_and_hands_off.py
new file mode 100644
index 00000000..19d88744
--- /dev/null
+++ b/reme_ai/mem_tool/v3/summary_and_hands_off.py
@@ -0,0 +1,140 @@
+import json
+from typing import TYPE_CHECKING
+
+from loguru import logger
+
+from ..base_memory_tool import BaseMemoryTool
+from ...core.enumeration import MemoryType
+from ...core.schema import MemoryNode, Message
+
+if TYPE_CHECKING:
+    from ...mem_agent import BaseMemoryAgent
+
+
+class SummaryAndHandsOff(BaseMemoryTool):
+    def __init__(self, memory_agents: list["BaseMemoryAgent"], **kwargs):
+        kwargs["enable_multiple"] = True
+        kwargs["sub_ops"] = memory_agents or []
+        super().__init__(**kwargs)
+        from ...mem_agent import BaseMemoryAgent
+
+        self.sub_ops: list[BaseMemoryAgent] = [a for a in self.sub_ops if isinstance(a, BaseMemoryAgent)]
+        self.messages: list[Message] = []
+
+    @property
+    def memory_agent_dict(self) -> dict[MemoryType, "BaseMemoryAgent"]:
+        return {a.memory_type: a for a in self.sub_ops}
+
+    def _build_tool_description(self) -> str:
+        return "Summarize and distribute memory tasks to appropriate agents."
+
+    def _build_multiple_parameters(self) -> dict:
+        return {
+            "type": "object",
+            "properties": {
+                "summary_content": {
+                    "type": "string",
+                    "description": "summary content",
+                },
+                "memory_tasks": {
+                    "type": "array",
+                    "description": "memory_tasks",
+                    "items": {
+                        "type": "object",
+                        "properties": {
+                            "memory_type": {
+                                "type": "string",
+                                "description": "memory_type",
+                                "enum": [k.value for k in self.memory_agent_dict],
+                            },
+                            "memory_target": {
+                                "type": "string",
+                                "description": "memory_target",
+                            },
+                        },
+                        "required": ["memory_type", "memory_target"],
+                    },
+                },
+            },
+            "required": ["summary_content", "memory_tasks"],
+        }
+
+    @staticmethod
+    def _parse_memory_type_target(task: dict):
+        return {
+            "memory_type": MemoryType(task.get("memory_type", "")),
+            "memory_target": task.get("memory_target", ""),
+        }
+
+    def _collect_tasks(self) -> list[dict]:
+        tasks = []
+        for task in self.context.get("memory_tasks", []):
+            tasks.append(self._parse_memory_type_target(task))
+        return tasks
+
+    async def execute(self):
+        summary_content = self.context.get("summary_content", "")
+        assert summary_content, "No summary content provided."
+
+        summary_node = MemoryNode(
+            memory_type=MemoryType.HISTORY,
+            memory_target="",
+            when_to_use=summary_content,
+            content=self.messages_formated,
+            ref_memory_id="",
+            author=self.author,
+            metadata={},
+        )
+        logger.info(f"Adding summary node: {summary_node.model_dump_json(indent=2, exclude_none=True)}")
+        self.memory_nodes.append(summary_node)
+        vector_node = summary_node.to_vector_node()
+        await self.vector_store.delete(vector_ids=[vector_node.vector_id])
+        await self.vector_store.insert([vector_node])
+
+        tasks = self._collect_tasks()
+        if not tasks:
+            self.output = "No valid memory tasks to execute."
+            return
+
+        agent_list = []
+        for i, task in enumerate(tasks):
+            memory_type: MemoryType = task["memory_type"]
+            memory_target: str = task["memory_target"]
+
+            if memory_type not in self.memory_agent_dict:
+                logger.warning(f"No agent found for memory_type={memory_type}")
+                continue
+
+            agent = self.memory_agent_dict[memory_type].copy()
+            agent_list.append([agent, memory_type, memory_target])
+
+            logger.info(f"Task {i}: Submitting {memory_type.value} agent for target={memory_target}")
+            self.submit_async_task(
+                agent.call,
+                query=self.context.get("query", ""),
+                messages=self.context.get("messages", []),
+                memory_type=memory_type,
+                memory_target=memory_target,
+                description=self.context.get("description"),
+                ref_memory_id=self.context.get("ref_memory_id", ""),
+            )
+
+        await self.join_async_tasks()
+
+        results = []
+        for i, (agent, memory_type, memory_target) in enumerate(agent_list):
+            result_str = str(agent.output)
+            if agent.memory_nodes:
+                self.memory_nodes.extend(agent.memory_nodes)
+            if agent.messages:
+                self.messages.extend(agent.messages)
+
+            results.append({
+                "memory_type": memory_type.value,
+                "memory_target": memory_target,
+                "result": result_str[:100] + ("..." if len(result_str) > 100 else ""),
+            })
+            logger.info(f"Task {i}: Completed {memory_type.value} agent for target={memory_target}")
+
+        results_str = json.dumps(results, ensure_ascii=False, indent=2)
+        self.output = f"Successfully executed summary and {len(results)} hands-off task(s):\n{results_str}"
diff --git a/reme_ai/mem_tool/v3/update_user_profile.py b/reme_ai/mem_tool/v3/update_user_profile.py
new file mode 100644
index 00000000..56ad4284
--- /dev/null
+++ b/reme_ai/mem_tool/v3/update_user_profile.py
@@ -0,0 +1,118 @@
+from loguru import logger
+
+from ..base_memory_tool import BaseMemoryTool
+from ...core.context import C
+from ...core.schema.memory_node import MemoryNode
+
+
+@C.register_op()
+class UpdateUserProfile(BaseMemoryTool):
+
+    def __init__(self, **kwargs):
+        kwargs["enable_multiple"] = True
+        super().__init__(**kwargs)
+
+    def _build_multiple_parameters(self) -> dict:
+        return {
+            "type": "object",
+            "properties": {
+                "profile_ids_to_delete": {
+                    "type": "array",
+                    "description": self.get_prompt("profile_ids_to_delete"),
+                    "items": {"type": "string"},
+                },
+                "profiles_to_add": {
+                    "type": "array",
+                    "description": self.get_prompt("profiles_to_add"),
+                    "items": {
+                        "type": "object",
+                        "properties": {
+                            "profile_content": {
+                                "type": "string",
+                                "description": self.get_prompt("profile_content"),
+                            },
+                            "timestamp": {
+                                "type": "string",
+                                "description": self.get_prompt("timestamp"),
+                            },
+                        },
+                        "required": ["profile_content", "timestamp"],
+                    },
+                },
+            },
+            "required": ["profile_ids_to_delete", "profiles_to_add"],
+        }
+
+    async def execute(self):
+        memory_type = "personal"
+        memory_target = self.memory_target
+        assert memory_target, "memory_target is not configured."
+
+        cache_key = f"{memory_type}_{memory_target}"
+
+        profile_ids_to_delete = self.context.get("profile_ids_to_delete", [])
+        profile_ids_to_delete = [m for m in profile_ids_to_delete if m]
+        profile_ids_to_delete = list(dict.fromkeys(profile_ids_to_delete))
+
+        profiles_to_add = self.context.get("profiles_to_add", [])
+
+        if not profile_ids_to_delete and not profiles_to_add:
+            self.output = "No memories to remove or add. Operation has been done."
+            return
+
+        cached_data = self.meta_memory.load(cache_key, auto_clean=False)
+        existing_memory_nodes = []
+        if cached_data:
+            existing_memory_nodes = [MemoryNode(**node_data) for node_data in cached_data]
+
+        removed_count = 0
+        added_count = 0
+
+        if profile_ids_to_delete:
+            profile_ids_set = set(profile_ids_to_delete)
+            existing_memory_nodes = [
+                node for node in existing_memory_nodes if node.memory_id not in profile_ids_set
+            ]
+            removed_count = len(profile_ids_to_delete)
+            logger.info(f"Removed {removed_count} memories from user profile.")
+
+        new_memory_nodes = []
+        if profiles_to_add:
+            for mem in profiles_to_add:
+                profile_content = mem.get("profile_content", "")
+                timestamp = mem.get("timestamp", "")
+
+                if not profile_content:
+                    logger.warning("Skipping memory with empty content")
+                    continue
+
+                memory_node = self._build_memory_node(
+                    memory_content=profile_content,
+                    when_to_use="",
+                    metadata={"timestamp": timestamp}
+                )
+                memory_node.memory_type = MemoryNode.MemoryType.PERSONAL
+                memory_node.memory_target = memory_target
+
+                new_memory_nodes.append(memory_node)
+
+            added_count = len(new_memory_nodes)
+            logger.info(f"Added {added_count} new memories to user profile.")
+
+        updated_memory_nodes = existing_memory_nodes + new_memory_nodes
+
+        nodes_data = [node.model_dump(exclude_none=True) for node in updated_memory_nodes]
+        self.meta_memory.save(cache_key, nodes_data)
+
+        operations = []
+        if removed_count > 0:
+            operations.append(f"removed {removed_count} old memories")
+        if added_count > 0:
+            operations.append(f"added {added_count} new memories")
+
+        if operations:
+            self.output = f"Successfully {' and '.join(operations)} in user profile."
+        else:
+            self.output = "Operation has been done."
+
+        logger.info(self.output)
diff --git a/reme_ai/mem_tool/write_local_memories.py b/reme_ai/mem_tool/write_local_memories.py
new file mode 100644
index 00000000..ac1c5aae
--- /dev/null
+++ b/reme_ai/mem_tool/write_local_memories.py
@@ -0,0 +1,57 @@
+from loguru import logger
+
+from ..base_memory_tool import BaseMemoryTool
+from ...core.context import C
+from ...core.schema.memory_node import MemoryNode
+
+
+@C.register_op()
+class WriteLocalMemories(BaseMemoryTool):
+
+    def __init__(self, **kwargs):
+        kwargs["enable_multiple"] = True
+        super().__init__(**kwargs)
+
+    def _build_multiple_parameters(self) -> dict:
+        return {
+            "type": "object",
+            "properties": {
+                "memory_nodes": {
+                    "type": "array",
+                    "description": self.get_prompt("memory_nodes"),
+                    "items": {
+                        "type": "object",
+                        "description": "Memory node object",
+                    },
+                },
+            },
+            "required": ["memory_nodes"],
+        }
+
+    async def execute(self):
+        memory_nodes = self.context.get("memory_nodes", [])
+        
+        if not memory_nodes:
+            self.output = "No memory nodes provided."
+            return
+
+        memory_nodes = [MemoryNode(**node) if isinstance(node, dict) else node for node in memory_nodes]
+        
+        grouped = {}
+        for node in memory_nodes:
+            key = (node.memory_type.value, node.memory_target)
+            if key not in grouped:
+                grouped[key] = []
+            grouped[key].append(node)
+
+        written_keys = []
+        
+        for (memory_type, memory_target), nodes in grouped.items():
+            cache_key = f"{memory_type}_{memory_target}"
+            nodes_data = [node.model_dump() for node in nodes]
+            
+            self.meta_memory.save(cache_key, nodes_data)
+            written_keys.append(f"{memory_type}_{memory_target}")
+            logger.info(f"Saved {len(nodes)} nodes to cache key: {cache_key}")
+
+        self.output = f"Successfully written local memories: {', '.join(written_keys)}"
diff --git a/reme_ai/mem_tool/write_local_memories.yaml b/reme_ai/mem_tool/write_local_memories.yaml
new file mode 100644
index 00000000..81615b1b
--- /dev/null
+++ b/reme_ai/mem_tool/write_local_memories.yaml
@@ -0,0 +1,5 @@
+tool_multiple: |
+  Write memory nodes to local memory files.
+
+memory_nodes: |
+  List of memory nodes to write to local files.
diff --git a/reme_ai/reme.py b/reme_ai/reme.py
index e3aaf54d..ff9d8822 100644
--- a/reme_ai/reme.py
+++ b/reme_ai/reme.py
@@ -13,6 +13,11 @@ from .mem_agent.retriever import ReMeRetriever
 from .mem_agent.retriever_v2 import ReMeRetrieverV2
 from .mem_agent.summarizer import ReMeSummarizer, PersonalSummarizer
 from .mem_agent.summarizer_v2 import ReMeSummarizerV2, PersonalSummarizerV2
+from .mem_agent.v3 import (
+    PersonalSummarizerV3,
+    ReMeRetrieverV3,
+    ReMeSummarizerV3,
+)
 from .mem_tool import (
     HandsOffTool,
     ReadHistoryMemory,
@@ -24,12 +29,19 @@ from .mem_tool import (
 )
 from .mem_tool.v2 import (
     AddMemoryDrafts,
-    ReadHistory,
     RetrieveMemories,
     RetrieveRecentAndSimilarMemories,
     SummaryAndHandsOff,
     UpdateMemories,
 )
+from .mem_tool.v3 import (
+    AddMemory as AddMemoryV3,
+    ReadHistory as ReadHistoryV3,
+    ReadUserProfile,
+    RetrieveMemory,
+    SummaryAndHandsOff as SummaryAndHandsOffV3,
+    UpdateUserProfile,
+)
 
 
 @singleton
@@ -314,3 +326,86 @@ class ReMe(Application):
 
         else:
             raise NotImplementedError
+
+    async def summary_v3(
+            self,
+            messages: list[dict],
+            description: str = "",
+            user_id: str = "",
+            assistant_id: str = "",
+            **kwargs,
+    ):
+        """Summarizes messages using V3 workflow with user profile management."""
+
+        if user_id:
+            meta_memories = [
+                {
+                    "memory_type": "personal",
+                    "memory_target": user_id,
+                },
+            ]
+            messages = self._prepare_messages(messages, user_id, assistant_id)
+
+            personal_summarizer_v3 = PersonalSummarizerV3(
+                tools=[
+                    AddMemoryV3(),
+                    ReadUserProfile(add_memory_type_target=False),
+                    UpdateUserProfile(),
+                ],
+            )
+
+            reme_summarizer_v3 = ReMeSummarizerV3(
+                meta_memories=meta_memories,
+                tools=[SummaryAndHandsOffV3(memory_agents=[personal_summarizer_v3])],
+            )
+
+            # try:
+            await reme_summarizer_v3.call(messages=messages, description=description, **kwargs)
+            return reme_summarizer_v3.memory_nodes, reme_summarizer_v3.messages, reme_summarizer_v3.success
+            # except Exception as e:
+            #     print(f"Warning: reme_summarizer_v3.call failed: {e}")
+            #     return [], [], False
+
+        else:
+            raise NotImplementedError
+
+    async def retrieve_v3(
+            self,
+            query: str = "",
+            messages: list[dict] | None = None,
+            description: str = "",
+            user_id: str = "",
+            assistant_id: str = "",
+            top_k: int = 20,
+            **kwargs,
+    ):
+        """Retrieves relevant memories using V3 workflow with user profile support."""
+
+        if user_id:
+            messages = self._prepare_messages(messages, user_id, assistant_id)
+
+            meta_memories = [
+                {
+                    "memory_type": "personal",
+                    "memory_target": user_id,
+                },
+            ]
+
+            reme_retriever_v3 = ReMeRetrieverV3(
+                meta_memories=meta_memories,
+                tools=[
+                    ReadUserProfile(add_memory_type_target=True),
+                    RetrieveMemory(top_k=top_k),
+                    ReadHistoryV3(),
+                ],
+            )
+
+            # try:
+            await reme_retriever_v3.call(query=query, messages=messages, description=description, **kwargs)
+            return reme_retriever_v3.output, reme_retriever_v3.messages, reme_retriever_v3.success
+            # except Exception as e:
+            #     print(f"Warning: reme_retriever_v3.call failed: {e}")
+            #     return "error, not retrieved", [], False
+
+        else:
+            raise NotImplementedError
diff --git a/tests/test_vector_store.py b/tests/test_vector_store.py
index 2f4c1f4d..6ef9ab0e 100644
--- a/tests/test_vector_store.py
+++ b/tests/test_vector_store.py
@@ -350,35 +350,36 @@ async def test_search_with_single_filter(store: BaseVectorStore, _store_name: st
     logger.info("✓ Single filter search test passed")
 
 
-async def test_search_with_list_filter(store: BaseVectorStore, _store_name: str):
-    """Test vector search with list filter (IN operation)."""
-    logger.info("=" * 20 + " LIST FILTER SEARCH TEST " + "=" * 20)
+async def test_search_with_exact_match_filter(store: BaseVectorStore, _store_name: str):
+    """Test vector search with exact match filter."""
+    logger.info("=" * 20 + " EXACT MATCH FILTER SEARCH TEST " + "=" * 20)
 
-    # Test list filter (IN operation)
-    filters = {"node_type": ["tech", "tech_new"]}
+    # Test exact match filter
+    filters = {"node_type": "tech"}
     results = await store.search(
         query="What is artificial intelligence?",
         limit=5,
         filters=filters,
     )
 
-    logger.info(f"Filtered search (node_type IN [tech, tech_new]) returned {len(results)} results")
+    logger.info(f"Filtered search (node_type=tech) returned {len(results)} results")
     for i, r in enumerate(results, 1):
         node_type = r.metadata.get("node_type")
         logger.info(f"  Result {i}: type={node_type}, content={r.content[:50]}...")
-        assert node_type in ["tech", "tech_new"], "Result should have node_type in [tech, tech_new]"
+        assert node_type == "tech", "Result should have node_type='tech'"
 
-    logger.info("✓ List filter search test passed")
+    logger.info("✓ Exact match filter search test passed")
 
 
 async def test_search_with_multiple_filters(store: BaseVectorStore, _store_name: str):
     """Test vector search with multiple metadata filters (AND operation)."""
     logger.info("=" * 20 + " MULTIPLE FILTERS SEARCH TEST " + "=" * 20)
 
-    # Test multiple filters (AND operation)
+    # Test multiple exact match filters (AND operation)
     filters = {
-        "node_type": ["tech", "tech_new"],
+        "node_type": "tech",
         "source": "research",
+        "priority": "high",
     }
     results = await store.search(
         query="What is artificial intelligence?",
@@ -387,14 +388,16 @@ async def test_search_with_multiple_filters(store: BaseVectorStore, _store_name:
     )
 
     logger.info(
-        f"Multi-filter search (node_type IN [tech, tech_new] AND source=research) " f"returned {len(results)} results",
+        f"Multi-filter search (node_type=tech AND source=research AND priority=high) " f"returned {len(results)} results",
     )
     for i, r in enumerate(results, 1):
         node_type = r.metadata.get("node_type")
         source = r.metadata.get("source")
-        logger.info(f"  Result {i}: type={node_type}, source={source}, content={r.content[:40]}...")
-        assert node_type in ["tech", "tech_new"], "Result should have node_type in [tech, tech_new]"
+        priority = r.metadata.get("priority")
+        logger.info(f"  Result {i}: type={node_type}, source={source}, priority={priority}")
+        assert node_type == "tech", "Result should have node_type='tech'"
         assert source == "research", "Result should have source='research'"
+        assert priority == "high", "Result should have priority='high'"
 
     logger.info("✓ Multiple filters search test passed")
 
@@ -789,10 +792,9 @@ async def test_complex_metadata_queries(store: BaseVectorStore, _store_name: str
     await store.insert(complex_nodes)
     logger.info(f"✓ Inserted {len(complex_nodes)} nodes with complex metadata")
 
-    # Test 1: Multiple field filters with list values
+    # Test 1: Multiple exact match filters
     filters_1 = {
         "domain": "AI",
-        "year": ["2023", "2024"],
         "impact_factor": "high",
     }
     results_1 = await store.search(
@@ -800,26 +802,25 @@ async def test_complex_metadata_queries(store: BaseVectorStore, _store_name: str
         limit=10,
         filters=filters_1,
     )
-    logger.info(f"Test 1 - AI + high impact + recent years: {len(results_1)} results")
+    logger.info(f"Test 1 - AI + high impact: {len(results_1)} results")
     for r in results_1:
         assert r.metadata.get("domain") == "AI"
         assert r.metadata.get("impact_factor") == "high"
-        assert r.metadata.get("year") in ["2023", "2024"]
 
-    # Test 2: List filter with multiple subdomains
+    # Test 2: Single exact match filter
     filters_2 = {
-        "subdomain": ["nlp", "computer_vision"],
+        "subdomain": "nlp",
     }
     results_2 = await store.search(
         query="deep learning applications",
         limit=10,
         filters=filters_2,
     )
-    logger.info(f"Test 2 - NLP or Computer Vision: {len(results_2)} results")
+    logger.info(f"Test 2 - NLP subdomain: {len(results_2)} results")
     for r in results_2:
-        assert r.metadata.get("subdomain") in ["nlp", "computer_vision"]
+        assert r.metadata.get("subdomain") == "nlp"
 
-    # Test 3: Year-based filtering
+    # Test 3: Year-based exact match filtering
     filters_3 = {
         "year": "2024",
     }
@@ -1119,65 +1120,47 @@ async def test_filter_combinations(store: BaseVectorStore, _store_name: str):
     results_1 = await store.search(query="technology", filters={}, limit=10)
     logger.info(f"Test 1 - Empty filter: {len(results_1)} results")
 
-    # Test 2: Single value filter
+    # Test 2: Single exact match filter
     results_2 = await store.search(
         query="technology",
         filters={"node_type": "tech"},
         limit=10,
     )
-    logger.info(f"Test 2 - Single value filter: {len(results_2)} results")
+    logger.info(f"Test 2 - Single exact match filter: {len(results_2)} results")
     for r in results_2:
         assert r.metadata.get("node_type") == "tech"
 
-    # Test 3: List filter with single item
+    # Test 3: Multiple exact match filters (AND operation)
     results_3 = await store.search(
-        query="technology",
-        filters={"node_type": ["tech"]},
-        limit=10,
-    )
-    logger.info(f"Test 3 - List filter (single item): {len(results_3)} results")
-
-    # Test 4: List filter with multiple items
-    results_4 = await store.search(
-        query="technology",
-        filters={"category": ["AI", "ML", "DL"]},
-        limit=10,
-    )
-    logger.info(f"Test 4 - List filter (multiple items): {len(results_4)} results")
-    for r in results_4:
-        assert r.metadata.get("category") in ["AI", "ML", "DL"]
-
-    # Test 5: Multiple filters (AND operation)
-    results_5 = await store.search(
         query="technology",
         filters={
-            "node_type": ["tech", "tech_new"],
+            "node_type": "tech",
             "source": "research",
             "priority": "high",
         },
         limit=10,
     )
-    logger.info(f"Test 5 - Multiple filters (AND): {len(results_5)} results")
-    for r in results_5:
-        assert r.metadata.get("node_type") in ["tech", "tech_new"]
+    logger.info(f"Test 3 - Multiple exact match filters (AND): {len(results_3)} results")
+    for r in results_3:
+        assert r.metadata.get("node_type") == "tech"
         assert r.metadata.get("source") == "research"
         assert r.metadata.get("priority") == "high"
 
-    # Test 6: Filter with non-existent value
-    results_6 = await store.search(
+    # Test 4: Filter with non-existent value
+    results_4 = await store.search(
         query="technology",
         filters={"category": "NON_EXISTENT_CATEGORY"},
         limit=10,
     )
-    logger.info(f"Test 6 - Non-existent filter value: {len(results_6)} results")
-    assert len(results_6) == 0, "Should return no results for non-existent filter value"
+    logger.info(f"Test 4 - Non-existent filter value: {len(results_4)} results")
+    assert len(results_4) == 0, "Should return no results for non-existent filter value"
 
-    # Test 7: List operation with filters
+    # Test 5: List operation with multiple exact match filters
     list_results = await store.list(
         filters={"node_type": "tech", "priority": "high"},
         limit=20,
     )
-    logger.info(f"Test 7 - List with filters: {len(list_results)} results")
+    logger.info(f"Test 5 - List with multiple filters: {len(list_results)} results")
     for r in list_results:
         assert r.metadata.get("node_type") == "tech"
         assert r.metadata.get("priority") == "high"
@@ -1185,6 +1168,329 @@ async def test_filter_combinations(store: BaseVectorStore, _store_name: str):
     logger.info("✓ Filter combinations test passed")
 
 
+async def test_range_query_filters(store: BaseVectorStore, _store_name: str):
+    """Test range query filters using the new [start, end] syntax."""
+    logger.info("=" * 20 + " RANGE QUERY FILTERS TEST " + "=" * 20)
+
+    # Clean up any existing test data first
+    try:
+        existing_nodes = await store.list(filters={"test_type": "range_query_test"})
+        if existing_nodes:
+            await store.delete([node.vector_id for node in existing_nodes])
+            logger.info(f"Cleaned up {len(existing_nodes)} existing test nodes")
+    except Exception as e:
+        logger.warning(f"Failed to clean up existing nodes: {e}")
+
+    # Create test nodes with numeric metadata for range queries
+    import time
+
+    base_timestamp = int(time.time())
+    test_nodes = []
+
+    for i in range(20):
+        node = VectorNode(
+            vector_id=f"range_node_{i}",
+            content=f"Test content for range query node {i}",
+            metadata={
+                "test_type": "range_query_test",
+                "timestamp": base_timestamp + i * 1000,  # Each node is 1000 seconds apart
+                "rating": 50 + i * 2,  # Ratings from 50 to 88
+                "priority": i % 3,  # 0, 1, or 2
+                "category": ["tech", "science", "business"][i % 3],
+            },
+        )
+        test_nodes.append(node)
+
+    # Insert test nodes
+    await store.insert(test_nodes)
+    logger.info(f"Inserted {len(test_nodes)} test nodes with numeric metadata")
+
+    # Test 1: Range query on timestamp field
+    start_time = base_timestamp + 5000
+    end_time = base_timestamp + 15000
+    results_1 = await store.search(
+        query="test content",
+        limit=20,
+        filters={
+            "timestamp": [start_time, end_time],  # Range query: >= start_time AND <= end_time
+        },
+    )
+    logger.info(f"Test 1 - Timestamp range [{start_time}, {end_time}]: {len(results_1)} results")
+
+    # Verify all results are within range
+    for r in results_1:
+        ts = r.metadata.get("timestamp")
+        assert ts >= start_time, f"Timestamp {ts} should be >= {start_time}"
+        assert ts <= end_time, f"Timestamp {ts} should be <= {end_time}"
+        logger.debug(f"  Node {r.vector_id}: timestamp={ts}")
+
+    # Expected nodes: range_node_5 to range_node_15 (11 nodes)
+    assert len(results_1) >= 10, f"Expected at least 10 results, got {len(results_1)}"
+    logger.info("✓ Timestamp range query validated")
+
+    # Test 2: Range query on rating field
+    results_2 = await store.search(
+        query="test content",
+        limit=20,
+        filters={
+            "rating": [60, 80],  # Range query: rating >= 60 AND rating <= 80
+        },
+    )
+    logger.info(f"Test 2 - Rating range [60, 80]: {len(results_2)} results")
+
+    # Verify all results are within rating range
+    for r in results_2:
+        rating = r.metadata.get("rating")
+        assert rating >= 60, f"Rating {rating} should be >= 60"
+        assert rating <= 80, f"Rating {rating} should be <= 80"
+        logger.debug(f"  Node {r.vector_id}: rating={rating}")
+
+    # Expected: ratings from 60 to 80 (nodes 5-15)
+    assert len(results_2) >= 10, f"Expected at least 10 results, got {len(results_2)}"
+    logger.info("✓ Rating range query validated")
+
+    # Test 3: Combine range query with exact match filter
+    results_3 = await store.search(
+        query="test content",
+        limit=20,
+        filters={
+            "timestamp": [start_time, end_time],
+            "category": "tech",  # Exact match
+        },
+    )
+    logger.info(
+        f"Test 3 - Timestamp range + exact match (category=tech): {len(results_3)} results",
+    )
+
+    # Verify filters
+    for r in results_3:
+        ts = r.metadata.get("timestamp")
+        category = r.metadata.get("category")
+        assert ts >= start_time and ts <= end_time, "Timestamp should be in range"
+        assert category == "tech", f"Category should be 'tech', got '{category}'"
+        logger.debug(f"  Node {r.vector_id}: timestamp={ts}, category={category}")
+
+    # Expected: nodes within range AND category=tech
+    assert len(results_3) >= 3, f"Expected at least 3 results, got {len(results_3)}"
+    logger.info("✓ Combined range + exact match query validated")
+
+    # Test 4: Multiple range queries
+    results_4 = await store.search(
+        query="test content",
+        limit=20,
+        filters={
+            "timestamp": [base_timestamp + 8000, base_timestamp + 12000],
+            "rating": [65, 75],
+        },
+    )
+    logger.info(f"Test 4 - Multiple range queries: {len(results_4)} results")
+
+    # Verify both ranges
+    for r in results_4:
+        ts = r.metadata.get("timestamp")
+        rating = r.metadata.get("rating")
+        assert ts >= base_timestamp + 8000 and ts <= base_timestamp + 12000, "Timestamp out of range"
+        assert rating >= 65 and rating <= 75, f"Rating {rating} out of range [65, 75]"
+        logger.debug(f"  Node {r.vector_id}: timestamp={ts}, rating={rating}")
+
+    # Expected: nodes 8-12 (5 nodes) with overlapping ranges
+    assert len(results_4) >= 3, f"Expected at least 3 results, got {len(results_4)}"
+    logger.info("✓ Multiple range queries validated")
+
+    # Test 5: Range query with list operation
+    results_5 = await store.list(
+        filters={
+            "rating": [60, 70],
+            "test_type": "range_query_test",
+        },
+        limit=20,
+    )
+    logger.info(f"Test 5 - Range query in list operation: {len(results_5)} results")
+
+    # Verify rating range in list results
+    for r in results_5:
+        rating = r.metadata.get("rating")
+        assert rating >= 60 and rating <= 70, f"Rating {rating} should be in range [60, 70]"
+
+    logger.info("✓ Range query in list operation validated")
+
+    # Test 6: Edge case - exact boundary values
+    results_6 = await store.list(
+        filters={
+            "rating": [60, 60],  # Exact match using range syntax
+            "test_type": "range_query_test",
+        },
+        limit=20,
+    )
+    logger.info(f"Test 6 - Exact value using range syntax [60, 60]: {len(results_6)} results")
+
+    # Should return exactly one node (range_node_5 with rating=60)
+    for r in results_6:
+        rating = r.metadata.get("rating")
+        assert rating == 60, f"Rating should be exactly 60, got {rating}"
+
+    logger.info("✓ Boundary value range query validated")
+
+    # Test 7: Range query with sorting
+    results_7 = await store.list(
+        filters={
+            "rating": [60, 80],
+            "test_type": "range_query_test",
+        },
+        sort_key="rating",
+        reverse=True,
+        limit=5,
+    )
+    logger.info(f"Test 7 - Range query with sorting: {len(results_7)} results")
+
+    # Verify results are sorted and within range
+    for i in range(len(results_7) - 1):
+        rating1 = results_7[i].metadata.get("rating")
+        rating2 = results_7[i + 1].metadata.get("rating")
+        assert rating1 >= rating2, f"Results not sorted: {rating1} < {rating2}"
+        assert rating1 >= 60 and rating1 <= 80, "Rating out of range"
+
+    logger.info("✓ Range query with sorting validated")
+
+    # Clean up test data
+    await store.delete([node.vector_id for node in test_nodes])
+    logger.info("Cleaned up test nodes")
+
+    logger.info("✓ Range query filters test passed")
+
+
+async def test_string_range_queries(store: BaseVectorStore, store_name: str):
+    """Test range queries with string values (e.g., date strings, timestamps)."""
+    logger.info("=" * 20 + " STRING RANGE QUERIES TEST " + "=" * 20)
+
+    # Skip this test for stores that don't support string range queries properly
+    # Qdrant and ChromaDB only support numeric range queries, not string range queries
+    if store_name not in ["PGVectorStore", "LocalVectorStore", "ESVectorStore"]:
+        logger.info(f"Skipping string range query test for {store_name}")
+        return
+
+    # Clean up any existing test data first
+    try:
+        existing_nodes = await store.list(filters={"test_type": "string_range_test"})
+        if existing_nodes:
+            await store.delete([node.vector_id for node in existing_nodes])
+            logger.info(f"Cleaned up {len(existing_nodes)} existing test nodes")
+    except Exception as e:
+        logger.warning(f"Failed to clean up existing nodes: {e}")
+
+    # Create test nodes with string date metadata
+    test_nodes = []
+    dates = [
+        "2024-01-01",
+        "2024-01-15",
+        "2024-02-01",
+        "2024-02-15",
+        "2024-03-01",
+        "2024-03-15",
+        "2024-04-01",
+    ]
+
+    for i, date in enumerate(dates):
+        node = VectorNode(
+            vector_id=f"string_range_node_{i}",
+            content=f"Test content for date {date}",
+            metadata={
+                "test_type": "string_range_test",
+                "date": date,
+                "index": i,
+            },
+        )
+        test_nodes.append(node)
+
+    # Insert test nodes
+    await store.insert(test_nodes)
+    logger.info(f"Inserted {len(test_nodes)} test nodes with string dates")
+
+    # Test 1: String range query on date field
+    try:
+        results = await store.search(
+            query="test content",
+            limit=20,
+            filters={
+                "date": ["2024-02-01", "2024-03-15"],  # Range query on string dates
+            },
+        )
+        logger.info(f"Test 1 - String date range ['2024-02-01', '2024-03-15']: {len(results)} results")
+
+        # Verify all results are within range
+        expected_dates = ["2024-02-01", "2024-02-15", "2024-03-01", "2024-03-15"]
+        for r in results:
+            date = r.metadata.get("date")
+            assert date >= "2024-02-01", f"Date {date} should be >= '2024-02-01'"
+            assert date <= "2024-03-15", f"Date {date} should be <= '2024-03-15'"
+            logger.debug(f"  Node {r.vector_id}: date={date}")
+
+        assert len(results) >= 3, f"Expected at least 3 results, got {len(results)}"
+        logger.info("✓ String range query validated")
+    except Exception as e:
+        # For PGVector, this might fail on older implementations
+        if "PGVector" in store_name:
+            logger.warning(f"String range query failed for PGVector (expected if not updated): {e}")
+        else:
+            raise
+
+    # Clean up test data
+    await store.delete([node.vector_id for node in test_nodes])
+    logger.info("Cleaned up test nodes")
+
+    logger.info("✓ String range queries test passed")
+
+
+async def test_sql_injection_protection(store: BaseVectorStore, store_name: str):
+    """Test SQL injection protection in filter keys and collection names."""
+    logger.info("=" * 20 + " SQL INJECTION PROTECTION TEST " + "=" * 20)
+
+    # This test is only relevant for SQL-based stores
+    if store_name not in ["PGVectorStore"]:
+        logger.info(f"Skipping SQL injection test for {store_name}")
+        return
+
+    # Test 1: Invalid collection name (SQL injection attempt)
+    try:
+        from reme_ai.core.vector_store import PGVectorStore
+        from reme_ai.core.embedding import OpenAIEmbeddingModel
+        
+        embedding_model = OpenAIEmbeddingModel()
+        
+        # This should raise ValueError due to invalid table name
+        try:
+            invalid_store = PGVectorStore(
+                collection_name="test'; DROP TABLE users; --",
+                embedding_model=embedding_model,
+            )
+            logger.error("❌ FAILED: Invalid collection name was accepted (SQL injection risk!)")
+            assert False, "Should have raised ValueError for invalid collection name"
+        except ValueError as e:
+            logger.info(f"✓ Invalid collection name rejected: {e}")
+        
+        # Test 2: Invalid metadata key in filters
+        try:
+            results = await store.search(
+                query="test",
+                filters={
+                    "normal_key": "value",
+                    "bad'; DROP TABLE users; --": "value",
+                },
+            )
+            logger.error("❌ FAILED: Invalid metadata key was accepted (SQL injection risk!)")
+            assert False, "Should have raised ValueError for invalid metadata key"
+        except ValueError as e:
+            logger.info(f"✓ Invalid metadata key rejected: {e}")
+        
+        logger.info("✓ SQL injection protection validated")
+        
+    except Exception as e:
+        logger.error(f"SQL injection protection test failed: {e}")
+        raise
+
+    logger.info("✓ SQL injection protection test passed")
+
+
 async def test_list_with_sorting(store: BaseVectorStore, _store_name: str):
     """Test list operation with sorting by timestamp to get most recent top 10 items."""
     logger.info("=" * 20 + " LIST WITH SORTING TEST " + "=" * 20)
@@ -1353,7 +1659,7 @@ async def run_all_tests_for_store(store_type: str, store_name: str):
         await test_insert(store, store_name)
         await test_search(store, store_name)
         await test_search_with_single_filter(store, store_name)
-        await test_search_with_list_filter(store, store_name)
+        await test_search_with_exact_match_filter(store, store_name)
         await test_search_with_multiple_filters(store, store_name)
         await test_get_by_id(store, store_name)
         await test_list_all(store, store_name)
@@ -1374,6 +1680,9 @@ async def run_all_tests_for_store(store_type: str, store_name: str):
         await test_metadata_statistics(store, store_name)
         await test_update_metadata_only(store, store_name)
         await test_filter_combinations(store, store_name)
+        await test_range_query_filters(store, store_name)
+        await test_string_range_queries(store, store_name)
+        await test_sql_injection_protection(store, store_name)
         await test_list_with_sorting(store, store_name)
 
         # ========== Collection Management Tests ==========