Codex Pet Generator
Create Codex desktop pets from character references by defining row semantics, generating tiny-UI-readable loops, approving or rejecting rows, following slicing guidance, packing a 1536x1872 spritesheet with the bundled packer, validating it, and installing under ~/.codex/pets.
Install
npx skills add wyddy7/codex-pet-generator --skill codex-pet-generatorgit clone --depth 1 https://github.com/wyddy7/codex-pet-generator.git /tmp/codex-pet-generator
mkdir -p ~/.claude/skills
cp -r /tmp/codex-pet-generator/. ~/.claude/skills/codex-pet-generatorPersonal skills live in ~/.claude/skills. Use .claude/skills in a project folder to share a skill with your team.
From the SKILL.md
# Codex Pet Generator
Use this skill when the user wants to create, revise, validate, package, or install a custom Codex desktop pet.
## Core Principles
- Animation direction first, image generation second, deterministic packing third.
- Optimize for tiny UI readability, not for how pretty a large strip looks in isolation.
- Treat each row as one loopable state machine, not eight poster poses.
- Keep canon anchors: one approved scale reference, one seated-body reference, one standing-body reference, and one prop-language reference.
- Every generated row must be marked `approved` or `unapproved` before it can advance.
## Codex Format
Custom pets live at:
```text
~/.codex/pets/<pet-id>/
pet.json
spritesheet.png|webp
```
Required spritesheet:
- `1536x1872`
- `8x9` grid
- `192x208` per frame
- transparent final background
- PNG or WebP
Required `pet.json`:
```json
{
"id": "<pet-id>",
"displayName": "<Display Name>",
"description": "<one-line description>",
"spritesheetPath": "spritesheet.webp"
}
```
`spritesheetPath` is resolved relative to the `pet.json` file. Use the same `<pet-id>` as the parent directory name.
Row order is fixed:
1. `idle`
2. `running-right`
3. `running-left`
4. `waving`
5. `jumping`
6. `failed`
7. `waiting`
8. `running`
9. `review`
For row-by-row semantics, common failure modes, and tiny-UI design guidance, read [references/row-semantics.md](references/row-semantics.md) before prompting.
## WorkflowDetails
- Skill name
codex-pet-generator- Repository
- wyddy7/codex-pet-generator
- License
- MIT
- Repo updated
- 5 May 2026
FAQ
What does the Codex Pet Generator skill do?
Create Codex desktop pets from character references by defining row semantics, generating tiny-UI-readable loops, approving or rejecting rows, following slicing guidance, packing a 1536x1872 spritesheet with the bundled packer, validating it, and installing under ~/.codex/pets.
How do I install the Codex Pet Generator skill?
skills CLI (Claude Code, Cursor, Codex and more): npx skills add wyddy7/codex-pet-generator --skill codex-pet-generator. Skills go in ~/.claude/skills (personal) or .claude/skills (project), and Claude loads them automatically when a task matches the description.
Is Codex Pet Generator popular?
It lives in wyddy7/codex-pet-generator, which has 16 GitHub stars and 1 forks.
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