After this chapter you will be able to evaluate how agentic browsers and agent-native products actually work — and apply those patterns when designing your own agent-facing experiences. The material draws on four distinct builds: OpenAI's Atlas browser, The Browser Company's Dia, Mike Krieger's take on agent-native design at Anthropic Labs, and Proof, Every's collaborative editor built for humans and agents together. Each confronts the same question from a different angle: when software can act, read, and write on your behalf, what should the product look like?