Townie v5 is an in-browser AI agent that integrates with your code editor, allowing you to perform a variety of coding tasks quickly. It can scaffold projects, manage files, and run code with instant deployment, making it a versatile tool for developers. The new version offers different modes to control how it interacts with your code.

The article details a project where a developer, with the help of a language model, creates a basic web browser from scratch in three days. It outlines the process, challenges, and final results while emphasizing the efficiency of one human collaborating with an AI agent.