MemoryBuddy ๐ง
Give your AI agents a shared memory that lasts. Deploy once, connect any MCP-compatible AI tool โ Hermes, Trae, Cursor, Claude Desktop โ they all share the same memory.
๐ What is this?
Most AI tools suffer from "goldfish memory" โ refresh the page, start a new session, switch to another app, and everything's gone. You keep reintroducing yourself, re-explaining your preferences, re-stating context.
MemoryBuddy fixes this with a shared memory layer that any AI tool can read from and write to:
- ๐ง Long-term memory โ facts, preferences, decisions persist across sessions
- ๐ Semantic search โ find relevant memories by meaning, not just keywords
- ๐ค Auto fact extraction โ LLM automatically distills what's worth remembering
- ๐ Smart summarization โ long conversations get compressed, key points retained
- ๐๏ธ One-click forget โ
DELETEwipes everything, GDPR compliant - ๐ MCP protocol โ any MCP-compatible client can connect, zero integration code
- ๐ธ $0/month โ runs entirely on Cloudflare's free tier
๐ก What problem does it solve?
๐๏ธ Architecture
โโโโโโโโโโโ โโโโโโโโโโโ โโโโโโโโโโโ โโโโโโโโโโโ
โ Hermes โ โ Trae โ โ Cursor โ โ Claude โ
โโโโโโฌโโโโโ โโโโโโฌโโโโโ โโโโโโฌโโโโโ โโโโโโฌโโโโโ
โ MCP โ MCP โ MCP โ MCP
โผ โผ โผ โผ
โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
โ MemoryBuddy Worker (Cloudflare) โ
โ โ
โ /mcp โ MCP Server (5 tools, Streamable HTTP) โ
โ /chat โ HTTP API (SSE streaming + auto-extract)โ
โ /memory/:userId โ REST API โ
โโโโโโโโโโโโฌโโโโโโโโโโโโโโโโโโโฌโโโโโโโโโโโโโโโโโโโโโ
โ โ
โโโโโโโผโโโโโโ โโโโโโโโผโโโโโโโ
โ D1 (facts)โ โ Vectorize โ
โ SQLite DB โ โ (embeddings)โ
โโโโโโโโโโโโโ โโโโโโโโโโโโโโโ
Three-tier memory:
- Short-term (Durable Object) โ current conversation context
- Long-term (D1 database) โ structured facts: name, preferences, key entities
- Semantic (Vectorize) โ vector embeddings for meaning-based recall
๐ Quick Start (3 steps, ~5 minutes)
Prerequisites
- Cloudflare account (free is fine)
- Node.js 18+
1. Clone & Install
git clone https://github.com/Trainspotting31/memory-buddy.git
cd memory-buddy
npm install
2. Create Cloudflare Resources
npx wrangler login
# Create D1 database
npx wrangler d1 create memory-buddy-db
# Create Vectorize index
npx wrangler vectorize create memory-buddy-index --dimensions 768 --metric cosine
# Initialize database schema
npx wrangler d1 execute memory-buddy-db --remote --file=schema.sql
Copy the generated database_id into wrangler.toml (rename from wrangler.toml.example).
3. Deploy
npx wrangler deploy
Done! Your memory server is live at https://memory-buddy.<your-subdomain>.workers.dev ๐
๐ Connect Your AI Tools
MemoryBuddy speaks MCP (Model Context Protocol). Any MCP-compatible tool can connect โ they all share the same memory.
Hermes Agent
hermes mcp add memory-buddy --url https://memory-buddy.<your-subdomain>.workers.dev/mcp
Trae IDE
- Settings โ MCP โ Add Manually
- Type: Streamable HTTP
- URL:
https://memory-buddy.<your-subdomain>.workers.dev/mcp
Or create .trae/mcp.json in your project:
{
"mcpServers": {
"memory-buddy": {
"type": "streamable-http",
"url": "https://memory-buddy.<your-subdomain>.workers.dev/mcp"
}
}
}
Cursor
Add to ~/.cursor/mcp.json:
{
"mcpServers": {
"memory-buddy": {
"url": "https://memory-buddy.<your-subdomain>.workers.dev/mcp"
}
}
}
Claude Desktop
Add to claude_desktop_config.json:
{
"mcpServers": {
"memory-buddy": {
"type": "streamable-http",
"url": "https://memory-buddy.<your-subdomain>.workers.dev/mcp"
}
}
}
Any MCP Client (raw config)
Endpoint: https://memory-buddy.<your-subdomain>.workers.dev/mcp
Transport: Streamable HTTP
Auth: None (or add your own)
๐ ๏ธ MCP Tools
Once connected, the AI gets 5 tools:
Shared memory: All tools default to userId: "hermes-shared". Use different userIds to isolate memory per project/persona.
๐ก HTTP API (no MCP needed)
POST /chat โ Chat with memory
curl -N -X POST https://your-worker.workers.dev/chat \
-H "Content-Type: application/json" \
-d '{"userId":"user123","message":"Hi! I'm John and I love espresso."}'
GET /memory/:userId โ Get all memory
curl https://your-worker.workers.dev/memory/user123
DELETE /memory/:userId โ Wipe memory
curl -X DELETE https://your-worker.workers.dev/memory/user123
GET /health โ Health check
curl https://your-worker.workers.dev/health
โ๏ธ Configuration
Edit wrangler.toml:
[vars]
LLM_MODEL = "@cf/meta/llama-3.2-3b-instruct" # Default: Workers AI (free)
# Optional: use external LLM instead of Workers AI
LLM_API_KEY = "sk-your-key"
LLM_API_BASE = "https://api.openai.com/v1"
LLM_MODEL = "gpt-4o-mini"
๐ธ Why Cloudflare Free Tier?
๐ Project Structure
memory-buddy/
โโโ src/
โ โโโ index.ts # Hono router: /mcp + /chat + /memory + /health
โ โโโ mcp.ts # MCP Server factory (5 tools, stateless)
โ โโโ agent-do.ts # Durable Object: chat session + memory orchestration
โ โโโ llm.ts # LLM abstraction (Workers AI / OpenAI-compatible)
โ โโโ memory/
โ โโโ extract.ts # LLM-powered fact extraction
โ โโโ retrieve.ts # Hybrid retrieval (D1 + Vectorize)
โ โโโ summarize.ts # Conversation summarization
โโโ public/index.html # Built-in demo chat UI
โโโ schema.sql # D1 database schema
โโโ wrangler.toml.example # Cloudflare config template
โโโ package.json
๐ฎ Try the Demo
Open your Worker URL in a browser โ you'll see a built-in chat interface.
- Tell the agent your name and a preference ("I'm Sarah, I'm allergic to peanuts")
- Refresh the page
- Ask: "What do you know about me?"
It remembers everything. That's MemoryBuddy.
๐บ๏ธ Roadmap
- MCP Server (Streamable HTTP)
- Multi-agent shared memory
- Semantic search
- Auto fact extraction
- Memory categories & filtering
- User authentication
- Batch memory import/export
- Multi-language support
- Hermes plugin (auto-inject memory at conversation start)
๐ค Contributing
- Fork โ 2. Branch โ 3. Commit โ 4. Push โ 5. PR
๐ License
MIT โ see LICENSE