meMCP - Memory-Enhanced Model Context Protocol

A persistent memory system for Large Language Models (LLMs) that enables continuous learning and knowledge retention across sessions through the Model Context Protocol (MCP).

Overview

meMCP (Memory-Enhanced Model Context Protocol) is a sophisticated memory management system designed to give LLMs persistent, searchable memory capabilities. Unlike traditional stateless LLM interactions, meMCP allows AI assistants to build cumulative knowledge over time, remember insights from previous conversations, and provide increasingly intelligent responses based on accumulated experience.

Key Features

Persistent Memory

Facts and insights stored permanently across sessions
Automatic loading of historical knowledge on startup
Robust JSON-based storage with corruption prevention
Atomic write operations to prevent data loss

Semantic Search

TF-IDF based semantic indexing for intelligent fact retrieval
Cosine similarity scoring for relevance ranking
Cross-session search capabilities
Keyword extraction and document similarity analysis

Quality Assessment

Multi-dimensional quality scoring system (novelty, generalizability, specificity, validation, impact)
Configurable scoring weights and thresholds
Automatic fact classification and prioritization
Quality-based cleanup and retention policies

Streaming Support

Efficient handling of large result sets through chunked streaming
Pause/resume/cancel operations for long-running queries
Progress tracking and estimated completion times
Configurable chunk sizes for optimal performance

Modular Architecture

Separate modules for operations, queries, streaming, and management
Clean separation of concerns for maintainability
Backward compatibility with existing integrations
Easy extension and customization

Architecture

Core Components

SequentialGraphitiIntegration: Main orchestrator that initializes and coordinates all system components.

FactStore: Central storage manager handling fact persistence, indexing, and retrieval with semantic search capabilities.

MemoryTools: Modular MCP tool registration system with four specialized modules:

MemoryOperations: CRUD operations for facts
MemoryQueryHandler: Search and retrieval functionality
MemoryStreamingTools: Large dataset streaming capabilities
MemoryManagement: Cleanup, backup, and maintenance operations

SemanticIndex: TF-IDF based search engine providing intelligent fact discovery and similarity matching.

FileManager: Robust file I/O system with atomic writes, corruption detection, and automatic recovery.

ConfigurationManager: Flexible configuration system for customizing fact types, scoring weights, and system behavior.

HookManager: Event-driven system for capturing user interactions and processing sequential thinking data.

Data Flow

Input Processing: User interactions and insights are captured via hooks or direct tool calls
Quality Assessment: Multi-dimensional scoring evaluates the value and relevance of new information
Storage: Facts are atomically written to JSON files with semantic indexing
Retrieval: Semantic search finds relevant facts across all sessions with relevance scoring
Streaming: Large result sets are delivered in configurable chunks for optimal performance

Storage Structure

~/.mcp_sequential_thinking/
├── graphiti_store/
│   ├── facts/           # Individual fact JSON files
│   ├── indexes/         # Search indexes and metadata
│   └── backups/         # Automatic system backups
└── config/
    ├── fact-types.json      # Fact type definitions
    ├── scoring-weights.json # Quality scoring configuration
    └── settings.json        # System settings

Installation

Prerequisites

Node.js 18+
npm or yarn package manager

Setup

Clone the repository:

git clone <repository-url>
cd memcp

Install dependencies:

npm install

Initialize the system:

node src/index.js

The system will automatically create the necessary directory structure and configuration files on first run.

MCP Integration

Add to your MCP configuration file (typically mcp_config.json):

{
  "mcpServers": {
    "memcp": {
      "command": "node",
      "args": ["src/index.js"],
      "cwd": "/path/to/memcp"
    }
  }
}

Usage

Basic Operations

Store an insight:

await memoryTools.storeInsight({
  content: "React useCallback prevents unnecessary re-renders in child components",
  type: "verified_pattern",
  domain: "react",
  tags: ["performance", "hooks"],
  context: { framework: "react" }
});

Search for facts:

const results = await factStore.queryFacts({
  query: "React performance optimization",
  limit: 10,
  sortBy: "relevance"
});

Stream large result sets:

const streamId = await streamingManager.createBatchStream(
  { query: "database" },
  factStore,
  { chunkSize: 10 }
);

const chunk = await streamingManager.getNextChunk(streamId);

MCP Tools

The system provides comprehensive MCP tools for integration with AI assistants:

memory_store_insight: Store new knowledge
memory_query: Search existing facts
memory_update_fact: Modify existing facts
memory_delete_fact: Remove facts
memory_get_stats: System statistics
memory_get_related: Find related facts
memory_bulk_process: Process multiple insights
memory_cleanup: Maintenance operations
memory_stream_query: Start streaming query
memory_stream_next: Get next chunk
memory_stream_status: Check stream status
memory_stream_cancel: Cancel stream

Configuration

Fact Types: Define custom fact types with priorities and scoring multipliers:

{
  "verified_pattern": {
    "priority": 10,
    "retention_months": 36,
    "scoring_multiplier": 1.2,
    "keywords": ["proven", "tested", "verified"]
  }
}

Scoring Weights: Customize quality assessment dimensions:

{
  "novelty": 0.25,
  "generalizability": 0.20,
  "specificity": 0.20,
  "validation": 0.20,
  "impact": 0.15
}

System Settings: Adjust operational parameters:

{
  "quality_threshold": 60,
  "max_facts_per_session": 100,
  "retention_check_interval_hours": 24,
  "auto_backup": true,
  "debug_mode": false
}

Slash Commands

The system provides convenient slash commands for interactive use:

/memconfig: Open configuration interface
/remember <insight>: Store new knowledge
/recall <query>: Search for facts
/insights: View recent high-quality insights

Testing

Run the comprehensive test suite:

# Test core functionality
node test-semantic-search.js

# Test streaming capabilities
node test-streaming.js

# Test modular architecture
node test-modular-memory-tools.js

# Test corruption handling
node test-corruption-fixes.js

# Full system test drive
node test-drive-memcp.js

Performance Characteristics

Storage

Fact Storage: Individual JSON files for atomic operations
Indexing: In-memory indexes with periodic persistence
Search: TF-IDF semantic search with cosine similarity
Corruption Handling: Automatic detection and recovery

Scalability

Facts: Tested with 1000+ facts
Search: Sub-second response times for typical queries
Streaming: Configurable chunk sizes for large datasets
Memory: Efficient in-memory indexing with lazy loading

Reliability

Atomic Writes: Prevents data corruption during writes
Backup System: Automatic backups with configurable retention
Error Recovery: Graceful handling of corrupted files
Data Validation: JSON schema validation for all stored data

Development

Project Structure

src/
├── core/                    # Core integration layer
├── storage/                 # Data persistence layer
├── indexing/               # Search and semantic indexing
├── streaming/              # Large dataset streaming
├── tools/                  # MCP tool implementations
│   └── modules/           # Modular tool components
├── config/                 # Configuration management
├── hooks/                  # Event handling system
└── processing/             # Data processing pipeline

Adding New Features

New Fact Types: Add to config/fact-types.json
Custom Scoring: Implement in src/processing/QualityScorer.js
Search Enhancements: Extend src/indexing/SemanticIndex.js
New Tools: Add to appropriate module in src/tools/modules/

Contributing

Fork the repository
Create a feature branch
Add tests for new functionality
Ensure all tests pass
Submit a pull request

Troubleshooting

Common Issues

Storage directory not found: The system automatically creates directories on first run. Ensure write permissions to the home directory.

Corrupted JSON files: The system includes automatic corruption detection and repair. Corrupted files are quarantined and restored from backups when possible.

Memory usage: For large fact collections, consider adjusting max_facts_per_session and enabling periodic cleanup.

Search performance: Semantic indexing is rebuilt on startup. For large datasets, consider implementing incremental indexing.

Debug Mode

Enable debug mode in configuration for detailed logging:

{
  "debug_mode": true
}

License

This project is licensed under the MIT License - see the LICENSE file for details.

Acknowledgments

Built on the Model Context Protocol (MCP) specification
Uses TF-IDF for semantic search implementation
Inspired by Sequential-Graphiti memory architecture
Designed for integration with Claude and other LLM systems

Deploy Server

HTTP connection URL

security – no known vulnerabilities

license - permissive license

quality - confirmed to work

How are these scores calculated?

Tools

View all tools

A persistent memory system for Large Language Models (LLMs) that enables continuous learning and knowledge retention across sessions through the Model Context Protocol (MCP).

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