Synapse

AI coding session memory, shared across tools.

Synapse is a local MCP server that indexes conversations from Claude Code, OpenCode, OpenClaw, and other AI coding tools into a single SQLite database — letting any MCP client search and reuse past sessions.

Quick Start

git clone https://github.com/anthropics/synapse.git
cd synapse
bun install
bun link

# Index existing sessions
synapse sync

# Start MCP server
synapse serve --stdio

Add to ~/.claude/mcp.json:

{
  "mcpServers": {
    "synapse": {
      "command": "bunx",
      "args": ["synapse", "serve", "--stdio"]
    }
  }
}

See docs/setup.md for OpenCode and OpenClaw configuration.

Features

• Full-text search across all AI coding history (SQLite FTS5)
• Cross-tool memory — what you solved in Claude Code is available in OpenCode
• Local-first — your data never leaves your machine
• Incremental sync with file fingerprinting (inode + mtime + size)
• MCP protocol — works with any MCP-compatible client

MCP Tools

Tool	Description
synapse_search	Full-text search across indexed sessions
synapse_session_list	List sessions with optional filters (source, project, date)
synapse_session_detail	Retrieve full conversation for a session
synapse_sync	Trigger incremental sync from all sources

Architecture

┌─────────────┐     ┌─────────────┐     ┌─────────────┐
│ Claude Code  │     │  OpenCode   │     │  OpenClaw   │
│   .jsonl     │     │   .jsonl    │     │   .jsonl    │
└──────┬───────┘     └──────┬──────┘     └──────┬──────┘
       │                    │                    │
       └────────────┬───────┘────────────────────┘
                    ▼
           ┌────────────────┐
           │   Adapters     │  discover → parse → canonical
           └───────┬────────┘
                   ▼
           ┌────────────────┐
           │   Indexer      │  upsert projects/sessions/messages
           └───────┬────────┘
                   ▼
           ┌────────────────┐
           │  SQLite + FTS5 │  synapse.db
           └───────┬────────┘
                   ▼
           ┌────────────────┐
           │  MCP Server    │  stdio transport
           └────────────────┘

Contributing

bun install
bun test
bun run lint

License

MIT