Great writeup. With LLMs doing an increasing amount of the coding now, it would be great for the browser or development environment to have built-in validations

Great writeup. With LLMs doing an increasing amount of the coding now, it would be great for the browser or development environment to have built-in validations that enforce good performance. The coding agent (or human) would get direct, immediate feedback at development time that there's a performance threshold violation, at development time.