Mempalace

AI Memory That Actually Works — Project-scoped, persistent memory for OpenCode with zero-config setup.

OpenCode plugin integrating MemPalace lifetime memory system. Unlike other memory solutions, this provides true project-scoped memory with automatic context injection, background mining, and seamless MCP integration.

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✨ Why This Plugin?

Feature	opencode-mempalace	Other Solutions
Project-scoped memory	✅ Automatic per-workspace	❌ Global only
Auto-initialization	✅ Palace auto-created	❌ Manual setup
Context injection	✅ wakeUp() loads L0+L1 memory	❌ Manual tool calls
Background mining	✅ Idle/threshold/exit triggers	❌ None or manual
MCP Tools	✅ 19 native tools	❌ CLI only
Auto-update	✅ Built-in	❌ Manual

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🚀 Quick Start

# 1. Install mempalace CLI globally
pip install mempalace

# 2. Add plugin to OpenCode config
# Edit ~/.config/opencode/opencode.jsonc
{
  "plugin": ["opencode-mempalace"]
}

# 3. Open any project folder in OpenCode
# The plugin auto-initializes and starts tracking memory!

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🎯 Key Features

1. Project-Scoped Memory (Wings)

Each workspace gets its own isolated memory "wing":

~/projects/web-app      → wing_web-app
~/projects/api-service  → wing_api-service  
~/projects/mobile-app   → wing_mobile-app

Memories never leak between projects. Context is automatically loaded when you switch workspaces.

2. Zero-Config Auto-Initialization

First time opening a project? The plugin automatically:

• Detects if palace exists
• Initializes it in background if needed
• Loads existing context via wakeUp()
• Starts tracking for mining

3. Smart Context Injection

[Session Start] → injects PALACE_PROTOCOL + wakeUp() memory
[Message 2+]    → continues with context aware of previous work  
[Compaction]    → rescues critical memory before context loss

4. Background Auto-Mining

Your conversations are automatically saved:

• Message threshold: Every 15 messages (configurable)
• Session idle: When you stop chatting
• Session deleted: Cleanup trigger
• Process exit: Emergency sync save on Ctrl+C

5. 19 Native MCP Tools

Full MemPalace integration without CLI:

Tool	Description
mempalace_status	Palace overview
mempalace_search	Semantic memory search
mempalace_kg_query	Knowledge graph queries
mempalace_diary_read/write	Session journaling
mempalace_add_drawer	Store specific memories
...and 14 more

6. Built-in Auto-Update

Checks NPM registry on session start, auto-installs updates in background. Never miss improvements.

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📋 Configuration

// ~/.config/opencode/opencode.jsonc
{
  "plugin": [
    ["opencode-mempalace", {
      "threshold": 20,        // Messages before auto-mining (default: 15)
      "palacePath": "/custom/path",  // Custom palace directory
      "disableAutoLoad": false,       // Skip wakeUp injection
      "disableAutoMining": false,    // Disable background mining
      "disableAutoUpdate": false,     // Disable version checks
      "disableMcp": false            // Skip MCP registration
    }]
  ]
}

Options

Option	Type	Default	Description
mcpCommand	string[]	["python3", "-m", "mempalace.mcp_server"]	Command to start the MCP server
disableMcp	boolean	false	Skip auto-registering MCP server
disableProtocol	boolean	false	Skip injecting PALACE_PROTOCOL
disableAutoLoad	boolean	false	Skip auto-loading context
disableAutoUpdate	boolean	false	Skip auto-update check
palacePath	string	~/.mempalace/palace	Override palace directory
disableAutoMining	boolean	false	Disable background mining
threshold	number	15	Messages before auto-mining

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🔄 Comparison with option-K/opencode-plugin-mempalace

This plugin is an evolution of the excellent option-K/opencode-plugin-mempalace, adding:

Addition	Benefit
MCP Server Integration	19 native tools vs CLI-only
Auto-update mechanism	Self-updating plugin
Diary tracking	Session journaling with reminders
Bun ecosystem	Faster builds, no execa dependency
Security hardening	Path validation, length limits

What we kept from the original:

• ✅ 3-state initialization (empty/initializing/ready)
• ✅ wakeUp() with L0+L1 memory loading
• ✅ Background mining with StateManager
• ✅ Emergency exit handlers
• ✅ Project-scoped wings
• ✅ AAAK compression support

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🧪 Development

# Clone and setup
git clone https://github.com/nguyentamdat/opencode-mempalace
cd opencode-mempalace
bun install

# Build
bun run build

# Test
bun test

# Check types
bun run check

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🙏 Credits & Shout Outs

• milla-jovovich/mempalace — The original MemPalace memory system architecture, AAAK dialect, and Python implementation. This plugin is just the OpenCode integration layer.

• option-K/opencode-plugin-mempalace — The pioneering OpenCode plugin that established the patterns for wakeUp, background mining, and 3-state initialization. We ported and extended these concepts.

• OpenCode — The AI terminal that makes plugins like this possible.

• Bun — The fast JavaScript runtime that powers our builds.

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📄 License

MIT © nguyentamdat

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