I built a browser daemon for AI coding agents because Playwright wasn't enough

The problem I use Claude Code on Windows — Anthropic's coding-agent CLI that runs alongside my editor. It drives my codebase through a pipeline of exec-style tool calls. One day I wanted Claude to open a web UI, log in to my account on a SaaS dashboard, export a CSV, and diff it against yesterday's. Simple task. I reached for Playwright. It didn't work. Here's why. Claude Code's Bash tool can start a long-running process with a run_in_background flag and read its stdout later. But it cannot writ