wangnov/codex-app-mirror

codex-app-mirror lets you download the official OpenAI Codex desktop app (for Windows or Mac) through alternative links that are fast and reliable, especially if you're in mainland China where the Microsoft Store or official OpenAI download servers can be hard to reach. It doesn't modify the app at all, it simply provides exact copies of the original installers, hosted on mirror servers that are easier to get to. Every 15 minutes, an automated process checks whether the official Codex app has released a new version. If something changed, it downloads the new installer files, publishes them to GitHub, and syncs them to a content delivery network. When you use one of the project's short links, a router figures out where you are in the world and sends you to the fastest available server. Each release also comes with checksum files so you can verify that what you downloaded is byte-for-byte identical to the official version. This is useful for developers or anyone who wants the Codex desktop app but struggles with slow downloads from the Microsoft Store or OpenAI's servers. On Mac, a companion app called Codex App Manager can subscribe to this mirror's update feed and automatically download only the small delta between your current version and the new one, rather than re-downloading the full installer each time. On Windows, you just grab the MSIX installer file and install it directly. A notable tradeoff is that the project is strictly a mirror, it never rebuilds, repackages, or re-signs anything. For Mac, it preserves the original update signatures by copying them exactly, which means the official security validation still works. The project also can't bypass any Windows organizational policies that block installing apps from outside the Microsoft Store, if your work or school computer blocks it, you'd need your IT admin to allow it.