opencode-supermemory

OpenCode plugin for persistent memory using Supermemory.

Installation

npx opencode-supermemory setup

Interactive wizard that:

1. Installs plugin globally
2. Creates /supermemory-init command
3. Adds plugin to OpenCode config

Then set your API key:

# Add to your shell profile (.zshrc, .bashrc, etc.)
echo 'export SUPERMEMORY_API_KEY="your-api-key"' >> ~/.zshrc
source ~/.zshrc

# Or set temporarily for current session
export SUPERMEMORY_API_KEY="your-api-key"  # from console.supermemory.ai

Make sure ~/.config/opencode/opencode.json contains the plugin:

{
  "plugin": ["opencode-supermemory"]
}

Features

Context Injection

On first message, injects:

• User profile (cross-project preferences)
• Project memories (all project knowledge)
• Relevant user memories (semantic search)

[SUPERMEMORY]

User Profile:
- Prefers concise responses
- Expert in TypeScript

Project Knowledge:
- [100%] Uses Bun, not Node.js
- [100%] Build: bun run build

Relevant Memories:
- [82%] Build fails if .env.local missing

Keyword Detection

Say "remember", "save this", "don't forget" etc. and the agent auto-saves to memory.

You: "Remember that this project uses bun"
Agent: [saves to project memory]

Codebase Indexing

Run /supermemory-init to explore and memorize your codebase structure, patterns, and conventions.

Preemptive Compaction

When context hits 80% capacity:

1. Triggers OpenCode's summarization
2. Injects project memories into summary context
3. Saves session summary as a memory

This preserves conversation context across compaction events.

Privacy

API key is <private>sk-abc123</private>

Content in <private> tags is never stored.

Tool Usage

The supermemory tool is available to the agent:

Scopes: user (cross-project), project (default)

Types: project-config, architecture, error-solution, preference, learned-pattern, conversation

Memory Scoping

Configuration

Create ~/.config/opencode/supermemory.jsonc:

{
  // API key (can also use SUPERMEMORY_API_KEY env var)
  "apiKey": "sm_...",
  
  // Min similarity for memory retrieval (0-1)
  "similarityThreshold": 0.6,
  
  // Max memories injected per request
  "maxMemories": 5,
  
  // Max project memories listed
  "maxProjectMemories": 10,
  
  // Max profile facts injected
  "maxProfileItems": 5,
  
  // Include user profile in context
  "injectProfile": true,
  
  // Prefix for container tags
  "containerTagPrefix": "opencode",
  
  // LLM filter prompt for memory relevance
  "filterPrompt": "You are a stateful coding agent. Remember all the information, including but not limited to user's coding preferences, tech stack, behaviours, workflows, and any other relevant details."
}

All fields optional. Env var SUPERMEMORY_API_KEY takes precedence over config file.

API timeout: 30s

Usage with Oh My OpenCode

If you're using Oh My OpenCode, disable its built-in auto-compact hook to let supermemory handle context compaction:

Add to ~/.config/opencode/oh-my-opencode.json:

{
  "disabled_hooks": ["anthropic-auto-compact"]
}

This ensures supermemory's preemptive compaction (which preserves memories across sessions) works correctly instead of oh-my-opencode's default compaction.

Hooks

Registered in package.json:

• chat.message - Context injection on first message, keyword detection
• event - Compaction monitoring and summary capture

Development

bun install
bun run build
bun run typecheck

Local install:

{
  "plugin": ["file:///path/to/opencode-supermemory"]
}

Logs

tail -f ~/.opencode-supermemory.log

License

MIT