wtf is heige-codex-skin-studio?

This project lets someone change the visual look of OpenAI's Codex Desktop app, turning a single picture into a full theme. Once installed, switching between themes is a single click in a menu at the top of the app, and the original, unmodified look can be restored at any time the same way. The tool works by connecting to the Codex Desktop app through a local debugging connection on the same machine, rather than editing the app's actual program files or signed resources. All of the app's normal buttons, text boxes, and menus keep working as usual after a theme is applied. Twelve built-in themes are included, based on characters and art from games and franchises such as Hatsune Miku, Genshin Impact, Wuthering Waves, Naruto, Love and Deepspace, and Dragon Ball, along with a couple of joke presets. A user can also make their own theme from any picture in three ways: uploading an image directly from the in-app menu for automatic color matching, running a separate customize script on any PNG, JPG, or WebP file to build a complete theme with matching colors and a background, or handing a bundled skill file to the Codex AI itself and simply asking it to generate an image and turn it into a theme. The project is honest about its limits. It works by connecting to a local debugging port that has no authentication, meaning any other program running with the same permissions on the same computer could also reach it, and the README documents this tradeoff openly. It notes that persistence across restarts is optional and must be turned on deliberately, and describes a lightweight reading mode meant to keep text easy to read without heavy visual effects or background network activity. Windows support relies on PowerShell scripts, while macOS has been tested on real devices. The code itself is released under the MIT license, but that license does not cover the character artwork, trademarks, or other third-party visuals bundled with the themes, which have separate usage terms.