A user-made collection of animated companion pets for OpenAI's Codex app, starting with a cheerful frog named Nai Frog.

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Last updated

2026-07-10

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FR-AI / ANALYSIS

Why it is worth attention

It demonstrates how to extend the Codex app with custom, locally-installed pets, providing a playful and personalized coding environment that the official app supports but doesn't yet supply.

Who it is for

  • Codex app users looking for a more cheerful coding experience
  • Developers interested in creating or modifying custom pets for Codex
  • Fans of digital companions and desktop pet culture
  • Power users who enjoy tweaking and personalizing their development tools

Use cases

  • Installing Nai Frog to brighten up daily coding sessions in Codex
  • Using the repository as a template to design and contribute new pets
  • Learning how Codex's custom pet system works by following the install steps
  • Testing and validating the 'Custom pets' feature in Codex with a ready-to-use pet

Strengths

  • Clear, step-by-step installation instructions for macOS, Linux, and Windows
  • Well-organized pet folder with only two files (pet.json and spritesheet.webp) makes it easy to understand
  • The first pet (Nai Frog) has a detailed visual description, hinting at thoughtful design
  • The repository explicitly warns against nesting the repo folder, preventing common installation mistakes

Considerations

  • Only one pet available so far; the collection is not yet diverse
  • No license has been added, leaving all rights reserved and reuse uncertain
  • Installation requires manual file copying and folder placement, not a one-click or in-app install

README quick start

Awesome Pets for Codex App

English · 简体中文

A growing collection of friendly companions for the Codex App.

About

Awesome Pets is a collection of custom pets for the Codex App. These companions are here to make coding, research, and everyday tasks feel a little more cheerful.

First to Arrive: Nai Frog

The first update introduces Nai Frog: a cheerful, round yellow companion with a cream-colored belly, bright green eyes, and a signature belly-holding laugh.

naifrog/
├── pet.json
└── spritesheet.webp
  • pet.json: pet metadata and spritesheet configuration
  • spritesheet.webp: the animated spritesheet for Nai Frog

Install in the Codex App

Option 1: Use the pet folder in Settings (recommended)

  1. Download or clone this repository:

    git clone https://github.com/Nitrogen216/awesome_pets.git
    
  2. Open the Codex App and go to Settings → Pets → Custom pets.

  3. Select Open folder to open the local custom-pet directory.

  4. Copy the repository's naifrog folder into that directory.

  5. Return to the Codex App and select Refresh.

  6. Select Nai Frog. If pets are currently hidden, select Wake Pet.

The final layout must be:

/pets/
└── naifrog/
    ├── pet.json
    └── spritesheet.webp

Do not copy the entire awesome_pets repository as a nested folder under pets; the Codex App looks for pet.json directly inside each pet directory.

Option 2: Install from a terminal

macOS or Linux

git clone https://github.com/Nitrogen216/awesome_pets.git
mkdir -p "${CODEX_HOME:-$HOME/.codex}/pets/naifrog"
cp -R awesome_pets/naifrog/. "${CODEX_HOME:-$HOME/.codex}/pets/naifrog/"

Windows PowerShell

git clone https://github.com/Nitrogen216/awesome_pets.git
$codexHome = if ($env:CODEX_HOME) { $env:CODEX_HOME } else { Join-Path $HOME ".codex" }
$petDir = Join-Path $codexHome "pets\naifrog"
New-Item -ItemType Directory -Force $petDir | Out-Null
Copy-Item ".\awesome_pets\naifrog\*" $petDir -Recurse -Force

After copying the files, open Settings → Pets and select Refresh, then choose Nai Frog. Restart the Codex App if the pet does not appear after refreshing.

By default, Codex home is ~/.codex on macOS and Linux and $HOME\.codex on Windows. If CODEX_HOME is set

Description

A growing collection of friendly companions for the Codex App.

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