Cairn

Name: Cairn
Author: luckyjackluo

luckyjackluo

A local-first, open-source harness for organizing your files with an AI agent, an MCP server for Claude Code, Codex, Cursor. BYO-key, no cloud.

Setup

Choose your client, copy the config, then fill in any required environment variables.

claude mcp add cairn -- uvx cairn-mcp-server

~/.codex/config.toml

[mcp_servers.cairn]
command = "uvx"
args = ["cairn-mcp-server"]

# codex mcp add cairn -- uvx cairn-mcp-server

~/.cursor/mcp.json

{
  "mcpServers": {
    "cairn": {
      "command": "uvx",
      "args": [
        "cairn-mcp-server"
      ]
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "cairn": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "cairn-mcp-server"
      ]
    }
  }
}

~/.gemini/settings.json

{
  "mcpServers": {
    "cairn": {
      "command": "uvx",
      "args": [
        "cairn-mcp-server"
      ]
    }
  }
}

claude_desktop_config.json

{
  "mcpServers": {
    "cairn": {
      "command": "uvx",
      "args": [
        "cairn-mcp-server"
      ]
    }
  }
}

.trae/mcp.json

{
  "mcpServers": {
    "cairn": {
      "command": "uvx",
      "args": [
        "cairn-mcp-server"
      ]
    }
  }
}