Hwatu is a new verification browser designed to accelerate AI agent workflows by providing instant, one-call checks. Unlike traditional tools like Playwright, Hwatu operates as a 'coldest warm daemon,' keeping its engine and GPU context pre-warmed for significantly faster execution. A typical check takes approximately 35 ms, a substantial improvement over Playwright's 341 ms in comparable scenarios.

Hwatu offers features like pixel-diff scoring, deterministic animation frames, and page state as JSON, moving beyond raw screenshots. It supports headless operation by default, preventing focus stealing, and integrates seamlessly with existing agent setups. Installation is streamlined via a simple bash script, and Hwatu detects common agent workflows like Claude Code and Cursor.

The browser is designed for minimal resource consumption, shipping as a single static binary. It allows for human intervention when needed, materializing a live session for direct interaction before returning control to the agent. This interruptible nature and rapid verification process are key differentiators, enabling agents to achieve higher accuracy, such as improving a page's pixel match from 85.1% to 98.8%.