Codex pet generator prompt
Pick the kind, style, mood, and details you want, then copy one workflow-ready brief into Codex. The AI handles the preflight, runs hatch-pet when available, and reports the finished package. If you want an existing package instead, start with the Codex pet gallery or the install guide.
Prompt builder
This does not generate images in the browser. It gives Codex a complete brief that asks the AI to check the skill, run hatch-pet, and verify the final package.
You only need to copy the brief. It tells the AI to check whether hatch-pet is available, then either run the workflow or stop and explain the missing setup.
Use the hatch-pet Codex skill to create a finished Codex pet package for this brief: playful pixel animal Codex pet: unicorn coding companion, small terminal badge, soft rainbow mane, readable silhouette, friendly idle and waving animations. Before generating, verify that hatch-pet is installed and discoverable in Codex. If it is missing, tell me the exact install/publish step and stop. If hatch-pet is available, run the full multi-step workflow instead of only rewriting the prompt: 1. Prepare the pet run from the brief. 2. Generate the base pet with imagegen. 3. Generate the shared atlas rows: idle, running-right, running-left, waving, jumping, failed, waiting, running, and review. 4. Finalize the package into ~/.codex/pets/<pet-id>/ with pet.json and spritesheet.webp. 5. Verify the spritesheet is 1536 x 1872, 8 columns x 9 rows, with 192 x 208 cells. When done, report the pet id, install folder, generated files, verification result, and how to enable it with /pet.
How to use
Select a kind, style, mood, and motion profile that match the Codex pet you want to hatch.
Describe the subject, silhouette, colors, accessories, and behavior in concrete language so the generated prompt is usable.
Paste the generated brief into Codex. The brief asks the AI to check hatch-pet first, so you do not need to manually verify the skill before copying.
After the AI reports a finished package, preview the spritesheet or check the manifest before using /pet.
Prompt FAQ
No. The generated brief includes an AI preflight step. It tells the AI to check whether hatch-pet is available, then either run the pet generation workflow or stop and explain the missing setup.
A good hatch-pet prompt should name the subject, kind, visual style, mood, and key readable details. It should also tell the AI to verify that hatch-pet is installed, run the full workflow, generate the base pet plus atlas rows, finalize the package, and report verification results.
No. hatch-pet has to be installed and discoverable as a Codex skill first. If the skill is missing, the AI should stop and explain how to install it instead of trying to invent a spritesheet.
No. Describe the character and the important behavior states, then let the generation workflow produce the frame set. Over-specifying every frame can make the prompt brittle and less visually consistent.
You should avoid publishing pets that depend on protected characters, logos, or brand assets unless you have the rights. Safer prompts describe an original companion with its own silhouette, colors, and personality.