Pandemic comes in different versions which can be installed independently. If you want to generate pdf files, you will also need a complete LaTeX installation on your system.

Command line tool

The pandemic Command Line Interface can be installed via the Node Package Manager:

# install Pandemic for command line use
npm install --global pandemic

Atom plugin

Alternatively, you can use Pandemic directly in Atom using the dedicated Pandemic plugin. Install the plugin from the Atom preference pane, or use the Atom Package Manager:

# install Pandemic for Atom
apm install pandemic

You don’t have to install the Pandemic CLI to use the Atom package. However, you cannot (yet) install new recipes or scaffolds via Atom: to do so, you will have to do it by hand or through the CLI.