Adding @vincent, as he will play a big role in this.

One of my early tasks here should be to provide a styleguide. A styleguide is a page that will show you all the available reusable components rendered in one place.

Example styleguide for the Hailo taxi service webapp: https://hailo-web-ui.hailoweb.com/

Every time a developer creates a new widget, it must be added to the styleguide with a usage example.
Should Giles be willing to tweak some CSS, this would let him easily customize and preview all components.