memomate 0.4.7

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MEMOS — Active Memory System for AI Coding Assistants

📖 中文文档

MEMOS is a lightweight RAG engine designed for AI coding assistants. It provides cross-session memory — remembering technical decisions, bug fixes, user preferences, and code conventions from past conversations. Built on ChromaDB + bge-large-zh-v1.5 with a built-in MCP server.

Features

• 🧠 Cross-Session Memory — Captures knowledge from conversations, retrieves it across sessions
• 🔌 MCP Server — 11 tools for AI assistant integration (Claude Code, etc.)
• 🔍 Hybrid Search — Vector similarity (1024-dim) × BM25 keyword scoring, time-decay ranking
• 📊 Web Dashboard — Browse, search, manage memories; visual configuration editor
• 🏗️ 4 Pipelines — AI-suggested + direct-write + auto-harvest + manual curation
• 🗂️ Multi-Project — Scoped by working directory, contexts stay separate
• ⚡ Lightweight — Local-only, single process, no external services

Quick Start

pip install memomate
memos init --force
memos dashboard

Open http://127.0.0.1:8000

Windows: If model download stalls, set $env:HF_ENDPOINT = "https://hf-mirror.com" before memos init.

Claude Code Integration

memos hook install

This registers MEMOS as an MCP server. Claude Code will automatically read and write memories during conversations.

Why MEMOS?

Existing memory solutions for AI coding assistants typically:

• ❌ Store flat text without semantic search
• ❌ Require external services (PostgreSQL, Redis, cloud APIs)
• ❌ Lack cross-project isolation
• ❌ Don't handle time-based memory decay

MEMOS addresses these with a self-contained, local-first architecture designed specifically for the AI-assisted coding workflow.

Architecture

graph LR
    subgraph AI Assistant
        A[Claude Code]
    end
    subgraph MEMOS
        B[MCP Server<br/>11 tools]
        C[Engine<br/>Retrieval + Extraction]
        D[Vector Store<br/>ChromaDB]
        E[Embedding Model<br/>bge 1024-dim]
        F[Web Dashboard<br/>FastAPI + Jinja2]
        G[Hybrid Search<br/>BM25 + Vector]
    end
    A <-->|stdio JSON-RPC| B
    B --> C
    C --> D & E & G
    F --> C

Project Structure

memos/
├── src/memos/
│   ├── config/      Pydantic models, loading chain, prompts
│   ├── storage/     Vector store abstraction (ChromaDB)
│   ├── engine/      Core: memory CRUD, extraction, review, BM25
│   ├── server/      MCP server (11 tools, FastMCP stdio)
│   ├── web/         FastAPI + Jinja2 dashboard
│   ├── cli/         argparse CLI (15+ commands)
│   ├── features/    Backup, daily review, notifications, wizard
│   └── hooks/       Claude Code hook scripts (prompt/stop)
├── memdb/           ChromaDB persistent data
├── model/           Local embedding models (~1.3GB)
└── etc/             Configuration files + i18n locales

MCP Tools (for AI Assistants)

Tool	Pipeline	Description
remember(text, metadata)	A	Buffer → LLM extraction
save_knowledge(text, type)	B	Direct write to store
recall(query, top_k, ...)	—	Semantic + hybrid search
list_memories(type, limit)	—	Paginate project memories
list_todos(status, limit)	—	List pending action items
update_todo(id, status)	—	Change todo status
delete_memory(memory_id)	—	Delete by ID
update_memory(id, text, meta)	—	Update content/metadata
force_extract()	A	Trigger immediate extraction
set_project_id(pid)	—	Switch project scope
log_complete_turn(user, asst)	A	Log a conversation round

CLI Commands

Command	Description
init	First-time setup wizard
dashboard	Launch web UI
server	Start MCP server (stdio)
status	View system health
doctor	Diagnose and troubleshoot
config show / set / validate	Manage configuration
export	Export memories to JSONL
import	Import from JSONL
backup / restore	Full database backup
hook install / uninstall / status	Claude Code hook management
auth regen	Regenerate dashboard token
vacuum	Reclaim deleted document space
reindex	Rebuild BM25 index

Configuration

All settings in etc/config.json. Key sections:

{
  "llm": {
    "endpoints": [
      {"name": "default", "api_base": "http://localhost:11434/v1"}
    ],
    "active": "default"
  },
  "model": {"name": "bge-large-zh-v1.5", "vector_dim": 1024},
  "memory": {"decay_lambda": 0.02, "default_top_k": 5},
  "suggestion": {"active_suggestion_threshold": 0.65}
}

Override any field via MEMOS_{SECTION}_{FIELD} environment variables.

Requirements

• Python 3.12+
• ~2GB disk (bge-large-zh-v1.5 model ~1.3GB)
• Windows / Linux / macOS

License

MIT