Frontend code reviews have a visibility problem (opens in new tab)

Most frontend pull requests are reviewed using a combination of code diffs, screenshots, and preview deployments. The problem is that none of these show the actual user experience. A reviewer might verify that a page loads correctly, but they rarely have time to click through every flow, test every interaction, or compare the experience before and after the change. As a result, the issues that often slip through aren’t broken builds—they’re subtle UX regressions: Layout shifts Broken mobile e...