Mesurer

Mesurer is a Chrome extension and React tool for inspecting, measuring and annotating a live interface, then pointing a coding agent at the exact element to change. Its overlay shows an element's dimensions and type properties, such as family, size, weight and line height, on any page, and a setup prompt connects it to your agent so feedback arrives as precise instructions. At version 0.2.2 the Chrome extension had passed 330,000 downloads when captured.