Twiddle

Twiddle is a Chrome extension that turns any live page, localhost, preview or production, into a design surface: fix spacing, sizing and colours by hand, bound to the page's own design tokens, then hit "Copy changes" to hand the agent a precise before/after instruction instead of a screenshot and a vague prompt. It works adaptively across phone, tablet and desktop widths so real `@media` rules actually run, and includes inspection tools (hatch, measure, contrast). Free while in beta; a paid plan comes later, with an early-supporter discount for anyone who installs during beta.