Mnemotree

🌳 Mnemotree

Memory module for LLMs and Agents with MCP

[](https://opensource.org/licenses/MIT) [](https://www.python.org/downloads/release/python-3100/) [](https://github.com/kurcontko/mnemotree/actions/workflows/ci.yml) [](https://sonarcloud.io/summary/newcode?id=kurcontkomnemotree) [](https://github.com/kurcontko/mnemotree/actions/workflows/codeql.yml)

Mnemotree gives LLM agents biologically-inspired memory. Store, retrieve, and analyze structured knowledge with semantic search, importance scoring, and relationship tracking. Integrates with LangChain, Autogen, and any MCP-compliant tool.

⚡ MCP Quickstart

Run mnemotree as an MCP server with zero setup:

uvx --from "git+https://github.com/kurcontko/mnemotree.git" --with "mnemotree[mcp_server]" mnemotree-mcp

Claude Desktop / Claude Code

Add to your config (claude_desktop_config.json, .mcp.json, or ~/.claude.json):

{
  "mcpServers": {
    "mnemotree": {
      "command": "uvx",
      "args": [
        "--from", "git+https://github.com/kurcontko/mnemotree.git",
        "--with", "mnemotree[mcp_server]",
        "mnemotree-mcp"
      ],
      "env": {
        "MNEMOTREE_MCP_PERSIST_DIR": "/Users/yourname/.mnemotree/chromadb"
      }
    }
  }
}

Codex CLI

Add to your ~/.codex/config.toml:

[mcp_servers.mnemotree]
command = "uvx"
args = [
  "--from", "git+https://github.com/kurcontko/mnemotree.git",
  "--with", "mnemotree[mcp_server]",
  "mnemotree-mcp",
]
startup_timeout_sec = 120
env = { MNEMOTREE_MCP_PERSIST_DIR = "/Users/yourname/.mnemotree/chromadb" }

Local Development

Replace git+https://... with /path/to/mnemotree to use your local clone.

Persistence

MNEMOTREE_MCP_PERSIST_DIR controls where memories are stored. Use an absolute path for consistent storage across clients. Omit to default to .mnemotree/chromadb.

HTTP Transport (Multi-Client)

uvx --from "git+https://github.com/kurcontko/mnemotree.git" --with "mnemotree[mcp_server]" mnemotree-mcp run --transport http --port 8000

Connect MCP clients to http://localhost:8000/mcp.

🌟 Features

• Memory Types: Episodic, semantic, autobiographical, prospective, procedural, priming, conditioning, working, entities
• Storage Backends: ChromaDB, SQLite+sqlite-vec, Neo4j
• Analysis: NER, keyword extraction, importance scoring, emotional context
• Retrieval: Semantic similarity, filtering, relationship queries
• Lite Mode: CPU-only embeddings, no LLM required

🚀 Getting Started

Installation

git clone https://github.com/kurcontko/mnemotree.git && cd mnemotree
uv venv .venv && uv pip install -e ".[lite,chroma]"

For NER: uv run python -m spacy download en_core_web_sm

For OpenAI features: cp .env.sample .env and add your API key.

Basic Usage

from mnemotree import MemoryCore
from mnemotree.store import ChromaMemoryStore

store = ChromaMemoryStore(persist_directory=".mnemotree/chromadb")
memory_core = MemoryCore(store=store)

# Store
memory = await memory_core.remember(
    content="User prefers Python for its readability.",
    tags=["preferences", "programming"]
)

# Recall
memories = await memory_core.recall("programming languages", limit=5)

# Reflect
insights = await memory_core.reflect(min_importance=0.7)

Lite Mode (CPU, no LLM)

memory_core = MemoryCore(store=store, mode="lite")

Uses local embeddings. Set MNEMOTREE_LITE_EMBEDDING_MODEL to override.

Alternative NER backends: mnemotree[ner_hf], mnemotree[ner_gliner], mnemotree[ner_stanza]

⚙️ MCP Environment Variables

| Variable | Default | Description | |----------|---------|-------------| | MNEMOTREE_MCP_PERSIST_DIR | .mnemotree/chromadb | Storage directory | | MNEMOTREE_MCP_COLLECTION | memories | Collection name | | MNEMOTREE_MCP_CHROMA_HOST/PORT/SSL | — | Remote ChromaDB | | MNEMOTREE_MCP_ENABLE_NER | false | Enable NER | | MNEMOTREE_MCP_ENABLE_KEYWORDS | false | Enable keyword extraction | | MNEMOTREE_MCP_NER_BACKEND | — | spacy, transformers, gliner, stanza | | MNEMOTREE_MCP_NER_MODEL | — | Backend-specific model ID/path |

Avoid running multiple MCP processes against the same Chroma directory.

🔧 Storage

# ChromaDB (local)
from mnemotree.store import ChromaMemoryStore
store = ChromaMemoryStore(persist_directory=".mnemotree/chromadb")

# ChromaDB (remote)
store = ChromaMemoryStore(host="localhost", port=8000)

# Neo4j
from mnemotree.store import Neo4jMemoryStore
store = Neo4jMemoryStore(uri="neo4j://localhost:7687", user="neo4j", password="password")

🐳 Docker

# MCP server
docker compose -f docker/mcp/docker-compose.yml up --build

# ChromaDB
docker compose -f docker/chromadb/docker-compose.yml up -d

# Neo4j
docker compose -f docker/neo4j/docker-compose.yml up -d

📦 Extras

uv pip install -e ".[chroma]"      # ChromaDB
uv pip install -e ".[neo4j]"       # Neo4j
uv pip install -e ".[sqlite_vec]"  # SQLite + sqlite-vec
uv pip install -e ".[lite]"        # Local embeddings
uv pip install -e ".[ner_hf]"      # Transformers NER
uv pip install -e ".[all]"         # Everything

Development

make lint typecheck test
make precommit-install

💡 Examples

• [examples/langchain_agent.py](examples/langchain_agent.py) — LangChain agent with memory
• [examples/memory_chat/app.py](examples/memory_chat/app.py) — Streamlit chat app with persistent memory

🤝 Contributing

Contributions welcome! Fork the repo, create a branch, add tests, and submit a PR.

📝 License

MIT - see [LICENSE](LICENSE)

Source & license

This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: kurcontko
• Source: kurcontko/mnemotree
• License: MIT

Install and usage instructions live in the source repository linked above.