A memory management toolkit for AI agents — Remember Me, Refine Me.

For the older version, please refer to the 0.2.x documentation.

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🧠 ReMe is a memory management framework designed for AI agents, providing both file-based and vector-based memory systems.

It tackles two core problems of agent memory: limited context window (early information is truncated or lost in long conversations) and stateless sessions (new sessions cannot inherit history and always start from scratch).

ReMe gives agents real memory — old conversations are automatically compacted, important information is persistently stored, and relevant context is automatically recalled in future interactions.

What you can do with ReMe

• Personal assistant: Provide long-term memory for agents like CoPaw, remembering user preferences and conversation history.
• Coding assistant: Record code style preferences and project context, maintaining a consistent development experience across sessions.
• Customer service bot: Track user issue history and preference settings for personalized service.
• Task automation: Learn success/failure patterns from historical tasks to continuously optimize execution strategies.
• Knowledge Q&A: Build a searchable knowledge base with semantic search and exact matching support.
• Multi-turn dialogue: Automatically compress long conversations while retaining key information within limited context windows.

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📁 File-based memory system (ReMeLight)

Memory as files, files as memory.

Treat memory as files — readable, editable, and copyable. CoPaw integrates long-term memory and context management by inheriting from ReMeLight.

Traditional memory system	File-based ReMe
🗄️ Database storage	📝 Markdown files
🔒 Opaque	👀 Always readable
❌ Hard to modify	✏️ Directly editable
🚫 Hard to migrate	📦 Copy to migrate

working_dir/
├── MEMORY.md              # Long-term memory: persistent info such as user preferences
├── memory/
│   └── YYYY-MM-DD.md      # Daily journal: automatically written after each conversation
└── tool_result/           # Cache for long tool outputs (auto-managed, expired entries auto-cleaned)
    └── <uuid>.txt

Core capabilities

ReMeLight is the core class of the file-based memory system. It provides full memory management capabilities for AI agents:

Category	Method	Function	Key components
Context Management	check_context	📊 Check context size	ContextChecker — checks whether context exceeds thresholds and splits messages
	compact_memory	📦 Compact history into summary	Compactor — ReActAgent that generates structured context summaries
	compact_tool_result	✂️ Compact long tool outputs	ToolResultCompactor — truncates long tool outputs and stores them in tool_result/ while keeping file references in messages
	pre_reasoning_hook	🔄 Pre-reasoning hook	compact_tool_result + check_context + compact_memory + summary_memory (async)
Long-term Memory	summary_memory	📝 Persist important memory to files	Summarizer — ReActAgent + file tools (read / write / edit)
	memory_search	🔍 Semantic memory search	MemorySearch — hybrid retrieval with vectors + BM25
-	start	🚀 Start memory system	Initialize file storage, file watcher, and embedding cache; clean up expired tool result files
-	close	📕 Shutdown and cleanup	Clean up tool result files, stop file watcher, and persist embedding cache

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🚀 Quick start

Installation

Install from source:

git clone https://github.com/agentscope-ai/ReMe.git
cd ReMe
pip install -e ".[light]"

Update to the latest version:

git pull
pip install -e ".[light]"

Environment variables

ReMeLight uses environment variables to configure the embedding model and storage backends:

Variable	Description	Example
LLM_API_KEY	LLM API key	sk-xxx
LLM_BASE_URL	LLM base URL	https://dashscope.aliyuncs.com/compatible-mode/v1
EMBEDDING_API_KEY	Embedding API key (optional)	sk-xxx
EMBEDDING_BASE_URL	Embedding base URL (optional)	https://dashscope.aliyuncs.com/compatible-mode/v1

Python usage

import asyncio

from reme.reme_light import ReMeLight


async def main():
    # Initialize ReMeLight
    reme = ReMeLight(
        default_as_llm_config={"model_name": "qwen3.5-35b-a3b"},
        # default_embedding_model_config={"model_name": "text-embedding-v4"},
        default_file_store_config={"fts_enabled": True, "vector_enabled": False},
    )
    await reme.start()

    messages = [...]  # List of conversation messages

    # 1. Compact long tool outputs (prevent tool results from blowing up context)
    messages = await reme.compact_tool_result(messages)

    # 2. Compact conversation history into a structured summary
    summary = await reme.compact_memory(
        messages=messages,
        previous_summary="",
        max_input_length=128000,  # Model context window (tokens)
        compact_ratio=0.7,  # Trigger compaction when exceeding max_input_length * 0.7
        language="zh",  # Summary language (e.g., "zh" / "")
    )

    # 3. Submit summary task asynchronously (non-blocking, writes to memory/YYYY-MM-DD.md)
    reme.add_async_summary_task(messages=messages)

    # 4. Pre-reasoning hook (auto compact tool results + generate summaries)
    processed_messages, compressed_summary = await reme.pre_reasoning_hook(
        messages=messages,
        system_prompt="You are a helpful AI assistant.",
        compressed_summary="",
        max_input_length=128000,
        compact_ratio=0.7,
        memory_compact_reserve=10000,
        enable_tool_result_compact=True,
        tool_result_compact_keep_n=3,
    )

    # 5. Semantic memory search (vector + BM25 hybrid retrieval)
    result = await reme.memory_search(query="Python version preference", max_results=5)

    # 6. Create in-session memory instance (manages context for one conversation)
    from reme.memory.file_based.reme_in_memory_memory import ReMeInMemoryMemory
    memory = ReMeInMemoryMemory()
    for msg in messages:
        await memory.add(msg)
    token_stats = await memory.estimate_tokens(max_input_length=128000)
    print(f"Current context usage: {token_stats['context_usage_ratio']:.1f}%")
    print(f"Message token count: {token_stats['messages_tokens']}")
    print(f"Estimated total tokens: {token_stats['estimated_tokens']}")

    # 7. Wait for background summary tasks to complete before shutdown
    summary_result = await reme.await_summary_tasks()

    # Shutdown ReMeLight
    await reme.close()


if __name__ == "__main__":
    asyncio.run(main())

📂 Full example: test_reme_light.py 📋 Sample run log: test_reme_light_log.txt (223,838 tokens → 1,105 tokens, 99.5% compression)

Architecture of the file-based ReMeLight memory system

CoPaw MemoryManager inherits ReMeLight and integrates its memory capabilities into the agent reasoning loop:

graph LR
    Agent[Agent] -->|Before each reasoning step| Hook[pre_reasoning_hook]
    Hook --> TC[compact_tool_result<br>Compact tool outputs]
    TC --> CC[check_context<br>Token counting]
    CC -->|Exceeds limit| CM[compact_memory<br>Generate summary]
    CC -->|Exceeds limit| SM[summary_memory<br>Async persistence]
    SM -->|ReAct + FileIO| Files[memory/*.md]
    Agent -->|Explicit call| Search[memory_search<br>Vector+BM25]
    Agent -->|In - session| InMem[ReMeInMemoryMemory<br>Token-aware memory]
    Files -.->|FileWatcher| Store[(FileStore<br>Vector+FTS index)]
    Search --> Store

---

1. check_context — context checking

ContextChecker uses token counting to determine whether the context exceeds thresholds and automatically splits messages into a "to compact" group and a "to keep" group.

graph LR
    M[messages] --> H[AsMsgHandler<br>Token counting]
    H --> C{total > threshold?}
    C -->|No| K[Return all messages]
    C -->|Yes| S[Keep from tail<br>reserve tokens]
    S --> CP[messages_to_compact<br>Earlier messages]
    S --> KP[messages_to_keep<br>Recent messages]
    S --> V{is_valid<br>Tool calls aligned?}

• Core logic: keep reserve tokens from the tail; mark the rest as messages to compact.
• Integrity guarantee: preserves complete user-assistant turns and tool_use/tool_result pairs without splitting them.

---

2. compact_memory — conversation compaction

Compactor uses a ReActAgent to compact conversation history into a * structured context summary*.

graph LR
    M[messages] --> H[AsMsgHandler<br>format_msgs_to_str]
    H --> A[ReActAgent<br>reme_compactor]
    P[previous_summary] -->|Incremental update| A
    A --> S[Structured summary<br>Goal/Progress/Decisions...]

Summary structure (context checkpoints):

Field	Description
## Goal	User goals
## Constraints	Constraints and preferences
## Progress	Task progress
## Key Decisions	Key decisions
## Next Steps	Next step plans
## Critical Context	Critical data such as file paths, function names, error messages, etc.

• Incremental updates: when previous_summary is provided, new conversations are merged into the existing summary.

---

3. summary_memory — persistent memory

Summarizer uses a ReAct + file tools pattern so that the AI can decide what to write and where to write it.

graph LR
    M[messages] --> A[ReActAgent<br>reme_summarizer]
    A -->|read| R[Read memory/YYYY-MM-DD.md]
    R --> T{Reason: how to merge?}
    T -->|write| W[Overwrite]
    T -->|edit| E[Edit in place]
    W --> F[memory/YYYY-MM-DD.md]
    E --> F

File tools (FileIO):

Tool	Function
read	Read file content
write	Overwrite file
edit	Find-and-replace edit

---

4. compact_tool_result — tool result compaction

ToolResultCompactor addresses the problem of long tool outputs bloating the context.

graph LR
    M[messages] --> L{Iterate tool_result<br>len > threshold?}
    L -->|No| K[Keep as-is]
    L -->|Yes| T[truncate_text<br>Truncate to threshold]
    T --> S[Write full content<br>tool_result/uuid.txt]
    S --> R[Append file path reference<br>to message]
    R --> C[cleanup_expired_files<br>Delete expired files]

• Auto cleanup: expired files (older than retention_days) are deleted automatically during start / close / compact_tool_result.

---

5. memory_search — memory retrieval

MemorySearch provides vector + BM25 hybrid retrieval.

graph LR
    Q[query] --> E[Embedding<br>Vectorization]
    E --> V[vector_search<br>Semantic similarity]
    Q --> B[BM25<br>Keyword matching]
    V -->|" weight: 0.7 "| M[Deduplicate + weighted merge]
    B -->|" weight: 0.3 "| M
    M --> F[min_score filter]
    F --> R[Top-N results]

• Fusion mechanism: vector weight 0.7 + BM25 weight 0.3 — balancing semantic similarity and exact matches.

---

6. ReMeInMemoryMemory — in-session memory

ReMeInMemoryMemory extends AgentScope's InMemoryMemory to provide token-aware memory management.

graph LR
    C[content] --> G[get_memory<br>exclude_mark=COMPRESSED]
    G --> F[Filter out compressed messages]
    F --> P{prepend_summary?}
    P -->|Yes| S[Prepend previous summary]
    S --> O[Output messages]
    P -->|No| O

Function	Description
get_memory	Filter messages by mark and auto-append summary
estimate_tokens	Estimate token usage of the context
state_dict / load_state_dict	Serialize/deserialize state (session persistence)

---

7. pre_reasoning_hook — pre-reasoning processing

This is a unified entry point that wires all the above components together and automatically manages context before each reasoning step.

graph LR
    M[messages] --> TC[compact_tool_result<br>Compact long tool outputs]
    TC --> CC[check_context<br>Compute remaining space]
    CC --> D{messages_to_compact<br>Non-empty?}
    D -->|No| K[Return original messages + summary]
    D -->|Yes| V{is_valid?}
    V -->|No| K
    V -->|Yes| CM[compact_memory<br>Sync summary generation]
    V -->|Yes| SM[add_async_summary_task<br>Async persistence]
    CM --> R[Return messages_to_keep + new summary]

Execution flow:

1. compact_tool_result — compact long tool outputs.
2. check_context — check whether the context exceeds limits.
3. compact_memory — generate compact summary (sync).
4. summary_memory — persist memory (async in the background).

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🗃️ Vector-based memory system

ReMe Vector Based is the core class for the vector-based memory system. It manages three types of memories:

Memory type	Use case
Personal memory	Records user preferences and habits
Procedural memory	Records task execution experience and patterns of success/failure
Tool memory	Records tool usage experience and parameter tuning

Core capabilities

Method	Function	Description
summarize_memory	🧠 Summarize	Automatically extract and store memories from conversations
retrieve_memory	🔍 Retrieve	Retrieve related memories based on a query
add_memory	➕ Add	Manually add memories into the vector store
get_memory	📖 Get	Get a single memory by ID
update_memory	✏️ Update	Update existing memory content or metadata
delete_memory	🗑️ Delete	Delete a specific memory
list_memory	📋 List	List memories with filtering and sorting

Installation and environment variables

Installation and environment configuration are the same as ReMeLight. API keys are configured via environment variables and can be stored in a .env file at the project root.

🧪 Experiments

Evaluations are conducted on three benchmarks: LoCoMo and HaluMem. Experimental settings:

1. ReMe backbone: as specified in each table.
2. Evaluation protocol: LLM-as-a-Judge following MemOS — each answer is scored by GPT-4o-mini.

Baseline results are reproduced from their respective papers under aligned settings where possible.

LoCoMo

Method	Single Hop	Multi Hop	Temporal	Open Domain	Overall
MemoryOS	62.43	56.50	37.18	40.28	54.70
Mem0	66.71	58.16	55.45	40.62	61.00
MemU	72.77	62.41	33.96	46.88	61.15
MemOS	81.45	69.15	72.27	60.42	75.87
HiMem	89.22	70.92	74.77	54.86	80.71
Zep	88.11	71.99	74.45	66.67	81.06
TiMem	81.43	62.20	77.63	52.08	75.30
TSM	84.30	66.67	71.03	58.33	76.69
MemR3	89.44	71.39	76.22	61.11	81.55
ReMe	89.89	82.98	83.80	71.88	86.23

HaluMem

Method	Memory Integrity	Memory Accuracy	QA Accuracy
MemoBase	14.55	92.24	35.53
Supermemory	41.53	90.32	54.07
Mem0	42.91	86.26	53.02
ProMem	73.80	89.47	62.26
ReMe	67.72	94.06	88.78

Python usage

import asyncio

from reme import ReMe


async def main():
    # Initialize ReMe
    reme = ReMe(
        working_dir=".reme",
        default_llm_config={
            "backend": "openai",
            "model_name": "qwen3.5-plus",
        },
        default_embedding_model_config={
            "backend": "openai",
            "model_name": "text-embedding-v4",
            "dimensions": 1024,
        },
        default_vector_store_config={
            "backend": "local",  # Supports local/chroma/qdrant/elasticsearch
        },
    )
    await reme.start()

    messages = [
        {"role": "user", "content": "Help me write a Python script", "time_created": "2026-02-28 10:00:00"},
        {"role": "assistant", "content": "Sure, I'll help you with that.", "time_created": "2026-02-28 10:00:05"},
    ]

    # 1. Summarize memories from conversation (automatically extract user preferences, task experience, etc.)
    result = await reme.summarize_memory(
        messages=messages,
        user_name="alice",  # Personal memory
        # task_name="code_writing",  # Procedural memory
    )
    print(f"Summary result: {result}")

    # 2. Retrieve related memories
    memories = await reme.retrieve_memory(
        query="Python programming",
        user_name="alice",
        # task_name="code_writing",
    )
    print(f"Retrieved memories: {memories}")

    # 3. Manually add a memory
    memory_node = await reme.add_memory(
        memory_content="The user prefers concise code style.",
        user_name="alice",
    )
    print(f"Added memory: {memory_node}")
    memory_id = memory_node.memory_id

    # 4. Get a single memory by ID
    fetched_memory = await reme.get_memory(memory_id=memory_id)
    print(f"Fetched memory: {fetched_memory}")

    # 5. Update memory content
    updated_memory = await reme.update_memory(
        memory_id=memory_id,
        user_name="alice",
        memory_content="The user prefers concise code with comments.",
    )
    print(f"Updated memory: {updated_memory}")

    # 6. List all memories for the user (supports filtering and sorting)
    all_memories = await reme.list_memory(
        user_name="alice",
        limit=10,
        sort_key="time_created",
        reverse=True,
    )
    print(f"User memory list: {all_memories}")

    # 7. Delete a specific memory
    await reme.delete_memory(memory_id=memory_id)
    print(f"Deleted memory: {memory_id}")

    # 8. Delete all memories (use with care)
    # await reme.delete_all()

    await reme.close()


if __name__ == "__main__":
    asyncio.run(main())

Technical architecture

graph LR
    User[User / Agent] --> ReMe[Vector Based ReMe]
    ReMe --> Summarize[Summarize memories]
    ReMe --> Retrieve[Retrieve memories]
    ReMe --> CRUD[CRUD operations]
    Summarize --> PersonalSum[PersonalSummarizer]
    Summarize --> ProceduralSum[ProceduralSummarizer]
    Summarize --> ToolSum[ToolSummarizer]
    Retrieve --> PersonalRet[PersonalRetriever]
    Retrieve --> ProceduralRet[ProceduralRetriever]
    Retrieve --> ToolRet[ToolRetriever]
    PersonalSum --> VectorStore[Vector database]
    ProceduralSum --> VectorStore
    ToolSum --> VectorStore
    PersonalRet --> VectorStore
    ProceduralRet --> VectorStore
    ToolRet --> VectorStore

Experimental results

Coming soon...

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🧪 Procedural memory paper

Our procedural (task) memory paper is available on arXiv.

🌍 Appworld benchmark

We evaluate ReMe on the Appworld environment using Qwen3-8B (non-thinking mode):

Method	Avg@4	Pass@4
w/o ReMe	0.1497	0.3285
w/ ReMe	0.1706 (+2.09%)	0.3631 (+3.46%)

Pass@K measures the probability that at least one of K generated candidates successfully completes the task (score=1). The current experiments use an internal AppWorld environment, which may differ slightly from the public version.

For more details on how to reproduce the experiments, see quickstart.md.

🔧 BFCL-V3 benchmark

We evaluate ReMe on the BFCL-V3 multi-turn-base task (random split 50 train / 150 val) using Qwen3-8B (thinking mode):

Method	Avg@4	Pass@4
w/o ReMe	0.4033	0.5955
w/ ReMe	0.4450 (+4.17%)	0.6577 (+6.22%)

For more details on how to reproduce the experiments, see quickstart.md.

⭐ Community & support

• Star & Watch: Starring helps more agent developers discover ReMe; Watching keeps you up to date with new releases and features.
• Share your results: Share how ReMe empowers your agents in Issues or Discussions — we are happy to showcase great community use cases.
• Need a new feature? Open a feature request; we’ll evolve ReMe together with the community.
• Code contributions: All forms of contributions are welcome. Please see the contribution guide.
• Acknowledgements: We thank excellent open-source projects such as OpenClaw, Mem0, MemU, and CoPaw for their inspiration and support.

Contributors

Thanks to all who have contributed to ReMe:

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📄 Citation

@software{AgentscopeReMe2025,
  title = {AgentscopeReMe: Memory Management Kit for Agents},
  author = {ReMe Team},
  url = {https://reme.agentscope.io},
  year = {2025}
}

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⚖️ License

This project is open-sourced under the Apache License 2.0. See LICENSE for details.

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🤔 Why ReMe?

ReMe stands for Remember Me and Refine Me, symbolizing our goal to help AI agents "remember" users and "refine" themselves through interactions. We hope ReMe is not just a cold memory module, but a partner that truly helps agents understand users, accumulate experience, and continuously evolve.

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📈 Star history