The author has created a custom desktop environment where almost every program was designed by them, using a combination of assembly language and Rust. This was made possible with the help of an AI tool called Claude Code, which allowed them to build tailored software in a relatively short amount of time. The author notes that this approach has resulted in a significant reduction in memory footprint and CPU usage, leading to improved performance and battery life. The author's goal was to create a desktop environment that fits their specific needs and workflow.