I coded an app from my car by talking to Codex

I recorded a two-minute video from my car that neatly sums up how I have been building some apps lately.

Watch the video on X

With the car parked, I am connected to the Mac over Wi-Fi. The computer is in the next room. I talk to Codex from my phone and tell it what I want to change in a CarPlay app.

Codex makes the change, compiles the app, installs it and opens it again. I can then test it directly on the car’s display.

The app is Ireneo, which is already published. It is for capturing a spoken idea from an iPhone or CarPlay without needing to type or pick up the phone.

I am not claiming that I now program without a computer. The computer is doing the work in the background and it is still where it makes sense to read code, review something complex or calmly design an interface. But I do not need to sit in front of it for every small iteration.

This is the part that still feels a little absurd:

I say it out loud → Codex implements it → it deploys to the car → I test it

The important constraint is safety: the car is parked. It is a convenient way to review a small change, not an invitation to operate software while driving.