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 jackli12/codex-game-studio --skill write-gddgit 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/write-gdd)<a href="https://agentmods.dev/skills/jackli12/codex-game-studio/write-gdd"><img src="https://agentmods.dev/badge/skills/jackli12/codex-game-studio/write-gdd/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/jackli12/codex-game-studio/write-gdd"><img src="https://agentmods.dev/badge/skills/jackli12/codex-game-studio/write-gdd.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 | $0.00051 | $0.00204 |
| Opus 5.5 | $0.00020 | $0.00082 |
| Sonnet 5.5 | $0.00010 | $0.00041 |
| Haiku 4.5 | $0.00005 | $0.00020 |
Grade A, and why
write-gdd 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 1mo 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
Write GDD
目标
把概念和玩法方向整理成结构化的游戏设计文档。
何时使用
- 项目需要正式的设计文档
- 现有设计笔记比较零散
工作流
- 收集概念与系统输入
- 按结构组织文档章节
- 标出缺失的设计决策
- 把实现计划交给
plan-production
输出要求
- 结构化 GDD 草稿
- 缺失决策
- 开放风险
- 下一步交接对象
参考资料
../shared/references/gdd-template.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.
- 1mo ago First seen · 34 lines · 51 tokens per session scan A 7ecf349f46ac
write-gdd is a skill published in the GitHub repository jackli12/codex-game-studio (20 stars, last pushed 4d ago), licensed MIT. It adds 51 tokens to every session and 204 once invoked, about $0.0002 per session on Opus 5.5. 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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