Agent Skill
Codex Pet skill
codex-petprime-skills/runcomfy-agent-skillscodex-pet/SKILL.md
Codex Pet generator on RunComfy. Build a Codex-compatible Codex Pet spritesheet.webp + pet.json from a single reference image, drop it into `${CODEX_HOME:-$HOME/.codex}/pets/<name>/` and Codex picks it up as a custom Codex Pet next to the 8 built-ins. This skill produces the exact Codex Pet atlas Codex expects (1536x1872 PNG/WebP, 8 cols x 9 rows, 192x208 cells, 9 animation states — idle, running-right, running-left, waving, jumping, failed, waiting, running, review). Calls OpenAI GPT Image 2 edit ONCE via the local RunComfy CLI as `runcomfy run openai/gpt-image-2/edit` to produce a canonical Codex Pet pose, then assembles all 9 animation rows programmatically with ImageMagick micro-transforms — no Codex Pro, no `$imagegen`, no OPENAI_API_KEY required, only RUNCOMFY_TOKEN. Triggers on "codex pet", "create codex pet", "make codex pet", "hatch codex pet", "/hatch image", "desktop pet codex", "codex pets", "spritesheet.webp", or any explicit ask to build a custom pet for OpenAI Codex.
always on
279 tokname + description
once used
5,497 tokSKILL.md body
bundled files
0
installs
400kskills.sh
Install the Codex Pet skill
Skills CLI (Claude Code, Codex, Cursor and others)
npx skills add https://github.com/prime-skills/runcomfy-agent-skills --skill codex-pet
Claude Code, by hand (all projects)
git clone --depth 1 https://github.com/prime-skills/runcomfy-agent-skills.git /tmp/runcomfy-agent-skills mkdir -p ~/.claude/skills cp -R /tmp/runcomfy-agent-skills/codex-pet ~/.claude/skills/codex-pet
For one project only, copy the folder into .claude/skills/ in that project instead. The agent picks it up when a task matches its description.
What it costs your context
Agent Skills load in three steps. Tokens counted with the o200k tokenizer; your model's count will differ a little.
| When | What loads | Cost |
|---|---|---|
| Every session | Name and description | 279 tok |
| When the agent uses it | The SKILL.md instructions | 5,497 tok |
| Only if opened | No bundled files | — |
Until it is used, codex-pet costs about 4.9× less than the median MCP server we measured (1,362 tokens on every turn). Installing all 30 skills from prime-skills/runcomfy-agent-skills would load 5,840 tokens of descriptions. Skills vs MCP study
Checks
- The instructions are over 5,000 tokens, the Agent Skills specification's guideline for SKILL.md.
Checked 2026-10-22 · method
What's inside
The headings of its SKILL.md. Read the full file on GitHub.
- Codex Pet — Pro Pack on RunComfy
- What a Codex Pet is
- Why this Codex Pet skill (vs OpenAI's official hatch-pet)
- Codex Pet animation rows
- Codex Pet style
- Prerequisites
- Codex Pet pipeline (1 GPT Image 2 call, ~2 min)
- Step 1: Generate the canonical Codex Pet (1 call)
- Step 2: Normalize the canonical into a 192x208 Codex Pet cell
- Step 3: Build the 9 Codex Pet row strips programmatically
- Step 4: Compose the Codex Pet atlas
- Step 5: Write the Codex Pet manifest
- Step 6: Install the Codex Pet
- Prompting the canonical Codex Pet — what works
- Tuning the micro-animation
- FAQ — Codex Pet
- Limitations
- Exit codes
- How it works
- Credits
- What this skill is not
- Security & Privacy
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