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Petdex is three things working together:

1. A web gallery at petdex.dev where the community submits, reviews, and showcases animated pets in the Codex sprite format.
2. A CLI that installs any pet on your machine with one command and ships them straight into Codex.
3. A desktop app that floats a pet on your screen and reacts to your coding agent's activity in real time.

Every pet is a folder. Every folder is a Pokédex entry. Every entry is one npx petdex install away.

Quick start

Follow this checklist to get a pet installed, visible in Codex, and connected to the desktop app.

1. Install a known pet:

npx petdex install boba

You should see ~/.petdex/pets/boba/ with pet.json and a spritesheet.

2. Get the desktop app from petdex.dev/download. It runs on macOS, Linux and Windows.

3. Open it, then hit Cmd+, over the pet to open Settings. Pick your pet under Pets, and connect your coding agents under Agents with one click each. No terminal involved.

The pet floats above your workspace and animates on every tool call your agent makes.

For users

You want to...	Do this
Browse pets	Visit petdex.dev
Install a pet	npx petdex install <slug>
Switch active mascot	Open Settings in the desktop app (Cmd+,)
Run the desktop floater	Download it from petdex.dev/download
Make a pet	Use the hatch-pet skill inside Codex, or build one with the Petdex creator tools
Submit a pet	npx petdex submit ./my-pet/ or drop it through the web submitter
Join the community	Discord

Full CLI reference: packages/petdex-cli/README.md.

For builders

If you want to build on top of Petdex (a desktop client, a wearable, an SDK, a Discord bot, anything), you have two stable surfaces:

• The HTTP API. petdex.dev/api/manifest returns every approved pet with its slug, spritesheet URL, animation states, and metadata.
• The pet package format. Every pet is a pet.json plus a spritesheet.{webp,png} rendered as an 8×9 grid of 192×208 frames.

21 open-source and source-available projects already build on these. See petdex.dev/built-with for the catalog, then submit yours via the issue template.

Architecture

crafter-station/petdex
├── src/
│   ├── app/[locale]/          Public site: gallery, /pets/<slug>, /collections, /built-with, /community, /create, /download, /submit, /u/<handle>, ...
│   ├── app/api/cli/           CLI endpoints: OAuth config, submit (zip → presigned R2), dedup check, register
│   ├── app/api/manifest/      Public manifest: every approved pet with its spritesheet URL
│   ├── app/api/admin/         Admin review surface for submissions, edits, collection requests
│   └── lib/db/schema.ts       Drizzle schema (Postgres)
├── packages/
│   ├── petdex-cli/            npm `petdex` (auth, list, install, select, submit, hooks, init)
│   ├── petdex-desktop/        Zig + WebKit floating mascot for macOS
│   └── discord-bot/           Discord.js bot for the Petdex server
├── public/built-with/         Screenshots for the community page
├── public/brand/              Logos, OS icons, Discord icon
└── drizzle/                   SQL migrations (Postgres schema history)

Web stack: Next.js 16, React 19, Tailwind, Drizzle, Postgres, Redis, Clerk, R2.
CLI: Bun + TypeScript, ships as a single npm binary. Auth via Clerk OAuth + PKCE.
Desktop: Zig on a fork of vercel-labs/zero-native, HTTP sidecar in Node for agent hooks.

Develop locally

Two paths are supported.

Goal	Command	Setup
Local full stack	bun run dev:docker	Docker or Podman, ~30s warm-up.
Run against real services	bun run dev	.env.local filled (maintainers only).

git clone https://github.com/crafter-station/petdex.git
cd petdex
bun install
bun run dev:docker

Open localhost:3000. Full guide in CONTRIBUTING.md.

Pet package format

Every pet is two files:

my-pet/
├── pet.json                Metadata: name, slug, tags, vibes, kind, frame size, animation states
└── spritesheet.webp        9 rows × 8 cols = 72 frames of 192×208 px each (or .png)

Animation states are the rows: idle, wave, run, failed, review, jump, extra1, extra2. Codex maps these to its agent activity hooks. Loop timing defaults to 1100ms at 6 frames per state.

Contribute

• Submit a pet: petdex.dev/submit or npx petdex submit <path>.
• List your project: open a Built with Petdex issue.
• Fix a bug or add a feature: read CONTRIBUTING.md, then open a PR.
• Hang out: Discord has channels for shipping (#wip, #ship-or-sink), feedback (#cli-feedback), and showcases (#showcase).

Pet IP and takedowns

Pets are user-submitted fan art. Petdex does not claim rights to any underlying IP. If you hold rights to a character and want a pet removed, file a takedown request and we review within 48 hours.

License

The source code is MIT. Pet assets are owned by their submitters under whatever license they choose to declare.

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