Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add merlinhu1/codex-game-studio --skill cgs-art-biblegit clone --depth 1 https://github.com/merlinhu1/codex-game-studioWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/merlinhu1/codex-game-studio/cgs-art-bible)<a href="https://agentmods.dev/skills/merlinhu1/codex-game-studio/cgs-art-bible"><img src="https://agentmods.dev/badge/skills/merlinhu1/codex-game-studio/cgs-art-bible/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/merlinhu1/codex-game-studio/cgs-art-bible"><img src="https://agentmods.dev/badge/skills/merlinhu1/codex-game-studio/cgs-art-bible.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00046 | $0.00571 |
| Opus 5 | $0.00023 | $0.00285 |
| Sonnet 5 | $0.00009 | $0.00114 |
| Haiku 4.5 | $0.00005 | $0.00057 |
Grade A, and why
cgs-art-bible scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
Codex Game Studio Art Bible
Use this skill for art bible work in Template Game.
Objective
Define visual identity, shape language, palette, camera, animation, UI style, and asset constraints.
Inputs
- AGENTS.md
- .codex/studio.json
- task-relevant files named by the user or task record
- design/gdd.md
- docs/market-overview.md
Arguments
- Objective or user request.
- Target files, scenes, assets, or docs.
- Constraints, deadlines, acceptance criteria, and verification command when known.
Procedure
- Clarify the requested define visual identity, shape language, palette, camera, animation, ui style, and asset constraints. and identify the current project stage.
- Collect evidence for Visual Identity, Shape Language, Palette.
- Draft or review the artifact in small sections, keeping player experience and scope visible.
- Produce the requested artifact or review with clear file paths and verification evidence.
Write Targets
- design/
Output Contract
- Summary
- Visual Identity
- Shape Language
- Palette
- Asset Constraints
- Risks
- Changed files or proposed files
- Verification evidence
- Next owner or decision
Quality Gates
- Visual Identity
- Shape Language
- Palette
- Asset Constraints
- Scope remains bounded to the current task and project stage.
- Report labels unverified assumptions separately from evidence.
Decision Gates
- Continue only when the expected output can be verified or clearly labeled as a plan.
- Escalate to producer or qa-playtester when scope, ownership, or acceptance evidence is ambiguous.
- Stop before broad rewrites, generated prompt mirrors, or hidden lifecycle behavior.
Handoff
Report changed files, verification evidence, remaining risks, and the next owner or decision. Do not imply hidden hooks or autonomous background work.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 11d ago First seen · 78 lines · 46 tokens per session scan A 39b5f572928c
cgs-art-bible is a skill published in the GitHub repository merlinhu1/codex-game-studio (54 stars, last pushed 1mo ago), licensed MIT. It adds 46 tokens to every session and 571 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
asset-gen
Generate visual assets from text prompts: PNG images (Gemini / xAI Grok), GLB 3D models (Tripo3D), rigged biped characters, retargeted animations, and frame-by-frame animated sprites, plus background removal. Use whenever a game needs generated art.
sprite-gen
A pipeline for turning generated 2D game-character images into transparent sprite sheets, which store animation frames for a game.
art-generate
Generates placeholder .aseprite files from asset specs using the Aseprite MCP. Reads asset specs and art bible, creates sprites with correct dimensions/palette/layers, exports PNGs. Run after /asset-spec has produced specs and /art-bible exists.
ai-asset-generation
Generate real game assets (images, skyboxes, 3D models, SFX, music, voice, video) from text prompts through the provider registry, with provenance and acceptance gates.
generated-raster-asset-pipeline
Define acceptance, validation, and runtime integration rules for raster assets generated with image models before they become real project content.
team-audio
Orchestrate audio team: audio-director + sound-designer + technical-artist + gameplay-programmer for full audio pipeline from direction to implementation.