Automatically hide Hyper.app on startup by running `HYPER_AUTOHIDE=1 hyper`

autohide.js

'use strict';
const $AUTO_HIDDEN = Symbol('autoHidden');
if (process.env.HYPER_AUTOHIDE) {
  exports.onApp = app => {
    if (app[$AUTO_HIDDEN]) return;
    app[$AUTO_HIDDEN] = true;
    const windows = app.getWindows();
    for (const window of windows.values()) {
      setTimeout(() => window.hide(), 500);
    }
  };
}

The 500ms delay is silly but seems to hit the sweet spot between window.hide() not having any effect and the window being fully visible. There's a perceptible flash but it's short enough not to be annoying during startup.