storybook/docs/_snippets/storybook-addon-load-external-addons-preset.md

function managerEntries(entry = []) {
  return [...entry, require.resolve('my-other-addon/register')];
}

const config = (entry = [], options) => {
  return [...entry, require.resolve('my-other-addon/addDecorator')];
};

export default {
  managerEntries,
  config,
};