# Codex Phone Lab

Install a Codex skill that turns a mobile app prompt into an Expo/React Native app you can open on a real phone with Expo Go.

## Install

```bash
npx codex-phone-lab
```

Then ask Codex:

```text
Use $codex-phone-lab and make me a notes app for my phone.
```

## What It Does

- Checks the local Expo/Node environment.
- Creates Expo SDK 54 apps when needed, matching the current Expo Go workflow.
- Starts Expo preview with a phone QR code.
- Guides Codex to build real mobile screens, not landing pages.
- Keeps the fast loop: prompt, code, Expo Go, live phone refresh.

## Requirements

- Node.js and npm.
- Expo Go installed on the phone.
- Phone and computer on the same Wi-Fi for LAN mode.

If LAN mode fails, use tunnel mode from the installed skill script:

```bash
~/.codex/skills/codex-phone-lab/scripts/start-phone-preview.sh tunnel
```

Override the skill's default app template only when your Expo Go supports a newer SDK:

```bash
CODEX_PHONE_LAB_EXPO_TEMPLATE=expo-template-default@sdk-55 ~/.codex/skills/codex-phone-lab/scripts/new-expo-app.sh my-app
```


Install a Codex skill for building Expo apps live on a real phone. 

 Socket raises $60M Series C at a $1B valuation to secure software supply chains for AI-driven development

codex-phone-lab

Install a Codex skill for building Expo apps live on a real phone.

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codex-phone-lab

Codex Phone Lab

Install

What It Does

Requirements

Keywords

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Codex Phone Lab

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