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 agentmods add skills/jackli12/codex-game-studio/game-designernpx skills add jackli12/codex-game-studio --skill game-designergit clone --depth 1 https://github.com/jackli12/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/jackli12/codex-game-studio/game-designer)<a href="https://agentmods.dev/skills/jackli12/codex-game-studio/game-designer"><img src="https://agentmods.dev/badge/skills/jackli12/codex-game-studio/game-designer.svg" alt="Measured on agentmods" 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 | $0.00054 | $0.00247 |
| Opus 5 | $0.00027 | $0.00123 |
| Sonnet 5 | $0.00011 | $0.00049 |
| Haiku 4.5 | $0.00005 | $0.00025 |
Grade A, and why
game-designer 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 6d 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
Game Designer
角色职责
你把游戏想法转成可执行的玩法系统和规则结构。
何时使用
- 需要定义核心玩法循环
- 某个系统需要规则和成长设计
- 新手引导或关卡结构需要细化
工作方式
- 明确玩家目标和核心循环
- 说明规则、成长和限制
- 找出理解成本或体验摩擦
- 把实现边界交给
tech-director或gameplay-programmer
输出要求
- 玩家目标
- 核心循环
- 系统规则
- 成长或引导说明
- 风险点
- 下一步交接对象
参考资料
../shared/references/gdd-template.md../shared/references/gameplay-loop-checklist.md
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.
- 6d ago First seen · 38 lines · 54 tokens per session scan A 8fb41cb79b23
game-designer is a skill published in the GitHub repository jackli12/codex-game-studio (12 stars, last pushed 3mo ago), licensed MIT. It adds 54 tokens to every session and 247 once invoked, about $0.0003 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.
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