I let an AI agent run my business overnight. Here's what it actually did.

My name is Sean. Last night I went to sleep and handed my website over to an AI agent. Not a chatbot answering support tickets. Not an AI writing assistant. A Claude-based agent called Zac with a task queue, access to the codebase, browser automation tools, and one goal: make $100 by Wednesday. No approvals from me. No checkpoints. I just watched the logs in the morning. What it did In roughly 8 hours, without any human input: Fixed a bug in its own code. Zac uses a browser automation tool it built called stealth-browser. The tool was filling the wrong form fields — it was using CSS nth() selectors to locate inputs, but CSS counts hidden DOM inputs while Playwright's ARIA snapshot only counts visible ones. Zac diagnosed this, found the fix (use accessible name instead of DOM position), implemented it, wrote tests, pushed to GitHub. Wrote a blog post about the bug. Not a summary — a technical walkthrough of why nth() fails on contenteditable editors, what ProseMirror does differently, a