ShackleAI Memory

Persistent memory for AI coding tools. The first MCP-native memory server.

Give Claude Code, Cursor, Windsurf, VS Code Copilot, OpenAI Codex, or any MCP-compatible AI tool persistent memory across sessions. Your AI remembers decisions, conventions, bugs, and context — picks up exactly where you left off.

Install — One Command

Run this in your project directory:

npx -y @shackleai/memory-mcp@latest setup

This creates two files in your project:

• .mcp.json — registers the memory server so your AI tool auto-starts it
• CLAUDE.md — tells the AI to actively use memory every session

Commit both to git so your whole team gets memory. That's it — no config, no API keys, no accounts.

npm/npx version too old? If the command fails, see Troubleshooting.

How It Works

1. Run the setup command above (one-time)
2. Start your AI tool in the project directory
3. Memory server starts automatically in the background
4. AI stores decisions, conventions, and bugs as you work
5. Next session — AI searches memory and picks up where you left off

You don't need to do anything after setup. The AI sees the memory tools and uses them proactively — storing important decisions, searching for past context, and saving session summaries.

Verify It Works

After setup, start a session and give your AI a task. Then ask:

"What have you stored in memory so far?"

If it calls memory_search and shows stored entries, it's working. In your next session, ask:

"What do you remember about this project?"

It should recall context from the previous session without reading any files.

Alternative Setup Methods

The npx setup command works for all MCP clients. If you prefer client-specific configuration:

claude mcp add memory -- npx -y @shackleai/memory-mcp@latest

{
  "mcpServers": {
    "memory": {
      "command": "npx",
      "args": ["-y", "@shackleai/memory-mcp@latest"]
    }
  }
}

{
  "mcpServers": {
    "memory": {
      "command": "npx",
      "args": ["-y", "@shackleai/memory-mcp@latest"]
    }
  }
}

{
  "servers": {
    "memory": {
      "command": "npx",
      "args": ["-y", "@shackleai/memory-mcp@latest"]
    }
  }
}

{
  "mcpServers": {
    "memory": {
      "command": "npx",
      "args": ["-y", "@shackleai/memory-mcp@latest"]
    }
  }
}

npm install -g @shackleai/memory-mcp
shackleai-memory setup

{
  "mcpServers": {
    "memory": {
      "command": "shackleai-memory"
    }
  }
}

git clone https://github.com/shackleai/memory-mcp.git
cd memory-mcp && npm install && npm run build

{
  "mcpServers": {
    "memory": {
      "command": "node",
      "args": ["/absolute/path/to/memory-mcp/dist/index.js"]
    }
  }
}

First Run

The first run downloads the embedding model (~80MB, one-time). After that, everything works offline.

Features

• One-command setup — npx -y @shackleai/memory-mcp@latest setup and you're done
• Fully automatic — auto-detects project on startup, no manual init needed
• 11 MCP tools — init, store, search, update, delete, list projects, session end, TODO status, export, import, cleanup
• MCP resources — project context available as a readable resource
• Local-first — everything stored on your machine at ~/.shackleai/
• Zero config — no API keys, no cloud account, no setup beyond the install command
• Offline — local embeddings via MiniLM-L6-v2 (free, runs on CPU)
• Human-readable — memories stored as Markdown files you can read and edit
• Git-friendly — version control your AI's memory with standard git
• Semantic search — find relevant memories by meaning, not just keywords
• Deduplication — automatically detects and merges duplicate memories
• Auto-archive — old session files cleaned up based on retention period
• Multi-project — separate memory spaces per project, auto-detected
• LLM-portable — switch AI tools anytime, your memory stays

MCP Tools Reference

memory_init

Initialize or switch project context. Auto-called on server startup — only call manually if switching projects mid-session.

Input:  { project_path: "/path/to/project" }
Output: { project_name, tech_stack, memory_count, summary }

Auto-detects project name from package.json, pyproject.toml, or directory name. Detects tech stack (Node.js, Python, Rust, Go, Java, Ruby, PHP, .NET, Docker, etc.).

memory_store

Save important information to persistent memory. Use for decisions, conventions, bugs, architecture, preferences, TODOs, and context.

Input:  {
  content: "We chose PostgreSQL with Prisma ORM for type-safe queries",
  category: "decision",        // decision|convention|bug|architecture|preference|todo|context|session_summary
  importance: "high",           // low|medium|high (optional, default: medium)
  tags: ["database", "orm"]     // optional
}
Output: { id, stored: true, deduplicated: false }

Automatically checks for duplicates. If similar content exists (cosine similarity > 0.9), updates the existing memory instead of creating a new one.

memory_search

Search past memories by semantic meaning.

Input:  { query: "what database are we using", category: "decision", limit: 5 }
Output: { results: [{ id, content, category, relevance, ... }], count }

Uses vector similarity search — finds relevant memories even when wording differs.

memory_update

Update an existing memory when information changes.

Input:  { id: "mem-uuid", content: "Updated content", reason: "Changed approach" }
Output: { updated: true, previous_content }

memory_delete

Remove a memory that is no longer relevant (soft delete).

Input:  { id: "mem-uuid" }
Output: { deleted: true }

memory_list_projects

List all projects with stored memories.

Input:  {}
Output: { projects: [{ name, path, tech_stack, memory_count, last_session }], count }

memory_session_end

Save a session summary and open items. Creates continuity between sessions.

Input:  { summary: "Built auth system with JWT", open_items: ["Add refresh tokens", "Write tests"] }
Output: { saved: true, date: "2026-03-04" }

MCP Resources

The server exposes project context as an MCP resource:

• memory://project/context — Current project's conventions, decisions, architecture, bugs, and TODOs. MCP clients that support resources can auto-load this at session start.

Storage

All data lives locally on your machine:

~/.shackleai/
  db/
    memory.db                    SQLite database + vector index
  projects/
    my-project/
      decisions.md               Key decisions with reasoning
      conventions.md             Coding standards and patterns
      bugs.md                    Known issues and fixes
      architecture.md            Architecture choices
      preferences.md             Developer preferences
      todos.md                   Open items
      context.md                 General context
      sessions/
        2026-03-04.md            Today's session summary
        2026-03-03.md            Yesterday's session
  config.yaml                    Optional configuration

Markdown is the source of truth. You can read, edit, or delete any memory file with a text editor. The SQLite database is the search index.

Configuration

Create ~/.shackleai/config.yaml (optional — sensible defaults work out of the box):

# Embedding provider: "local" (free, offline) or "openai" (better quality, requires API key)
embedding:
  provider: local

# Custom storage path (default: ~/.shackleai)
# storage_path: /path/to/custom/location

# Maximum memories per project before oldest are archived
max_memories_per_project: 10000

# Session files older than this are auto-archived
max_session_history_days: 90

# Automatically detect and merge duplicate memories
auto_dedup: true

# Cosine similarity threshold for deduplication (0.0 to 1.0)
dedup_threshold: 0.9

Cloud Mode

By default, ShackleAI Memory runs locally with SQLite — no account needed. Cloud mode syncs your memories to ShackleAI's managed infrastructure via the Gateway, giving you server-side persistence, cross-device access, and PostgreSQL + pgvector-powered semantic search.

Local vs Cloud

Get an API Key

1. Go to shackleai.com and sign in (or create an account)
2. Navigate to Settings > API Keys
3. Click Create Key — you'll get a unified account key in the format sk_shackle_*
4. Copy the key. It won't be shown again.

Configure Cloud Mode

Cloud mode connects to the ShackleAI Gateway MCP endpoint with Bearer authentication. Configure your MCP client to point at the Gateway instead of running the local server.

claude mcp add memory-cloud --transport http https://gateway.shackleai.com/mcp \
  --header "Authorization: Bearer sk_shackle_YOUR_KEY_HERE"

{
  "mcpServers": {
    "memory": {
      "type": "http",
      "url": "https://gateway.shackleai.com/mcp",
      "headers": {
        "Authorization": "Bearer sk_shackle_YOUR_KEY_HERE"
      }
    }
  }
}

{
  "mcpServers": {
    "memory": {
      "type": "http",
      "url": "https://gateway.shackleai.com/mcp",
      "headers": {
        "Authorization": "Bearer sk_shackle_YOUR_KEY_HERE"
      }
    }
  }
}

All 11 memory tools (memory_init, memory_store, memory_search, memory_update, memory_delete, memory_list_projects, memory_session_end, memory_status, memory_export, memory_import, memory_cleanup) work identically in cloud mode — no code changes needed.

Advanced: Auto-Init Options

The server auto-detects your project in this order:

1. CLI argument: --project-path /path/to/project
2. Environment variable: SHACKLEAI_PROJECT_PATH=/path/to/project
3. Working directory: Uses process.cwd() (this is what most MCP clients pass)

For explicit control, set the project path in your MCP config:

{
  "mcpServers": {
    "memory": {
      "command": "npx",
      "args": ["-y", "@shackleai/memory-mcp@latest", "--project-path", "/path/to/project"]
    }
  }
}

Or via environment variable:

{
  "mcpServers": {
    "memory": {
      "command": "npx",
      "args": ["-y", "@shackleai/memory-mcp@latest"],
      "env": {
        "SHACKLEAI_PROJECT_PATH": "/path/to/project"
      }
    }
  }
}

Troubleshooting

npx setup fails or "command not found: setup"

Your npm/npx is too old. This happens when npm is v6.x (ships with older Node installers). Check with:

npm --version

If it shows 6.x, fix it:

# Option 1: Update npm (recommended — gets you modern npx)
npm install -g npm@latest

# If that fails on Windows with "Refusing to delete" error:
# Delete the stale files first, then retry:
# Remove-Item "$env:APPDATA\npm\npm.cmd", "$env:APPDATA\npm\npx.cmd" -Force
# npm install -g npm@latest

# Option 2: Install globally instead (works with any npm version)
npm install -g @shackleai/memory-mcp
shackleai-memory setup

"Cannot connect to MCP server" / Server fails to start

Make sure Node.js 20+ is installed. Then verify the server runs:

npx -y @shackleai/memory-mcp --help

If using a global install, verify the binary is in your PATH:

shackleai-memory --help

Claude Code: "memory" not showing in claude mcp list

If you used npx setup, Claude Code reads .mcp.json from your project directory automatically — you don't need claude mcp list to show it. Just start claude in the project directory.

If you used claude mcp add instead, verify with:

claude mcp list
# Should show: memory: connected

AI not storing memories during sessions

The setup command creates a CLAUDE.md file with instructions that tell the AI to use memory proactively. If you already had a CLAUDE.md, the setup appends memory instructions to it. Check that your CLAUDE.md contains the "ShackleAI Memory" section.

If the AI still isn't storing, you can ask it directly:

"Store what you just did in memory"

This confirms the tools work, and the AI will be more proactive about storing in subsequent interactions.

First tool call is slow

The embedding model (~80MB) downloads on first use. This is a one-time download. Subsequent runs use the cached model and are fast.

Memory not persisting between sessions

Check that ~/.shackleai/ directory exists and has write permissions. The server creates it automatically on first run.

Wrong project detected

Use --project-path to explicitly set the project, or call memory_init with the correct path.

Why ShackleAI?

Every AI coding tool today has amnesia. Close the session, context is gone. Switch tools, everything lost.

ShackleAI fixes this by providing a universal memory layer that works across every MCP-compatible AI tool:

• Works with every AI tool — Claude Code, Cursor, Windsurf, VS Code Copilot, OpenAI Codex, Claude Desktop
• Works with every LLM — Claude, GPT, Gemini, Llama, Mistral — any LLM behind any MCP client
• Your memory is YOUR asset — switch tools anytime, your knowledge stays
• No vendor lock-in — open source, local storage, standard protocol

Requirements

• Node.js 20 or later
• npm 7 or later (for npx setup — or install globally with any npm version)
• Any MCP-compatible AI client

Contributing

Issues and PRs welcome at github.com/shackleai/memory-mcp.

License

MIT — free and open source forever.

The shackle that keeps your AI anchored. Built by ShackleAI.