What is codex-mini?

Codex Mini is a bridge tool that lets you use a phone's web browser to control a Codex Desktop session running on a Mac. You open a local web page on your phone, type or send an image, and that input gets pasted into the active Codex conversation on your Mac. The web page then mirrors Codex's replies, including its reasoning steps and tool calls, back to your phone in real time. There are two ways to get it: an open source version in this repository, meant for people comfortable running their own server and doing further development, and a prebuilt DMG application for Apple Silicon Macs that the author maintains directly and updates first with new features. The current release, version 4.0.3, switches to a faster control method built entirely on Chrome DevTools Protocol, letting it run quietly in the background, but the README warns that anyone upgrading from the earlier Beta version must fully uninstall it first, including its background service, or the new version may fail to control Codex properly. It also warns that this new version conflicts with other tools that control Codex Desktop through the same protocol, such as a separate project called Codex++, and that only one such tool can be active at a time. On the local network, the phone connects directly to the Mac and the feature is free to use. A paid Pro tier unlocks access from outside the local network by relaying the connection through the author's server, while keeping your Codex login, conversation history, and typed input on your own Mac, the server's stated role is limited to routing the connection and checking device authorization, not reading your conversations. The README states the project is source available for non-commercial use only. You may read, modify, and redistribute it with attribution, but commercial use, including paid hosting or resale, requires the author's written permission.