shikamaru for Claude Desktop

io.github.jayofemi/shikamaru

Provably correct day-count, calendar, business-day, and schedule math, verified against QuantLib.

client:Claude Desktop transport:stdio runtime:npm

Install shikamaru in Claude Desktop

~/Library/Application Support/Claude/claude_desktop_config.json · windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "shikamaru": {
      "command": "npx",
      "args": [
        "-y",
        "@jayofemi/shikamaru"
      ]
    }
  }
}

Settings → Developer → Edit Config opens this file. Restart the app after saving. Claude Desktop docs