Hwatu is a specialized verification browser designed for AI coding agents, allowing them to objectively measure web page rendering accuracy. It enables agents to iterate towards a target design by providing pixel-diff scores, animation analytics, and real GPU-composited screenshots. Crucially, hwatu transforms invisible agent sessions into real, interactive windows on demand, facilitating seamless human intervention for tasks like CAPTCHAs or judgment calls, then allowing the agent to resume without losing state. This daemon-based WebKitGTK browser offers rapid window spawning and efficient resource management, making it an ideal tool for integrating visual verification into agent workflows on Linux.
