Haruhiyuki/DesignCode ? reverse-engineered prompt

Build me a desktop graphic design app where I can type a simple request in a chat panel and have an AI agent turn it into a polished design draft. I want the design to preview on a canvas in real time, with text and elements that stay editable instead of becoming a flat image.

It should work well for things like posters, postcards, product promo graphics, book covers, and other layouts with lots of text. Please make it export clean, high quality files like PNG, SVG, PDF, and also a layered PSD with proper transparency. Add presets for common sizes and styles, plus a personal asset library so I can reuse images or brand assets in different designs.

I also want version history so I can go back through changes, and it should work on both macOS and Windows. If you need to check current docs or agent setup details online, go ahead.