This was the result of a _single_ prompt. Which actually shows the power of modern LLMs. I already have a from scratch C++ implementation of Photoshop, in my own custom UI toolkit, with my own custom GPU shaders. From scratch. Whole thing, ported over and I started last night. In preliminary benches it's roughly ~20-40% faster than their Photoshop rewrite. Will start heavy optimization passes and see how hard I can push it.