GameDesignOS: Instructions file for Codex

AGENTS.md

GameDesignOS AGENTS.md is an instructions file for Codex, OpenCode from DY-2026/GameDesignOS. It costs 972 tokens per session, scanned A, original, MIT.

A project guide for GameDesignOS, a command-line tool that routes game-design requests to suitable workflows. It can also organize longer projects in a separate workspace.

In plain words
What is it for?
Use it to route game-design, research, translation, analysis, or planning requests, start a project workspace, and record decisions, assumptions, experiments, and workflow results.
Why use it?
It tells coding agents how to interpret requests, choose the relevant workflow, and decide when project files should be created or updated.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions Claude Code; mentions AGENTS.md; mentions Codex.

This is DY-2026/GameDesignOS's own configuration. It tells Codex and OpenCode how to work on GameDesignOS itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything GameDesignOS configures →

Reuse

Borrowing it

Nothing to install: this file belongs to DY-2026/GameDesignOS. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/DY-2026/GameDesignOS/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/DY-2026/GameDesignOS

Made for: Codex, OpenCode.

Wrote 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.

agentmods badge for GameDesignOS AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/dy-2026/gamedesignos/agents-md.svg)](https://agentmods.dev/instructions/dy-2026/gamedesignos/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/dy-2026/gamedesignos/agents-md"><img src="https://agentmods.dev/badge/instructions/dy-2026/gamedesignos/agents-md.svg" alt="Measured on agentmods" height="20"></a>
Per session 972 This file is loaded in full into every session.
When invoked 972 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00972 $0.00972
Opus 5 $0.00486 $0.00486
Sonnet 5 $0.00194 $0.00194
Haiku 4.5 $0.00097 $0.00097

Measured 7d ago against content hash 7a3b39697a81, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

GameDesignOS AGENTS.md 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 7d 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.

AGENTS.md · 69 lines

How it starts

The opening of the file, as written. The whole thing — 69 lines — stays where its author put it; the contents beside it link to each section on GitHub.

GameDesignOS Agent 入口

这份文件给 Codex、Claude Code、OpenCode 等支持 AGENTS.md 的 agent 使用。目标是让用户拉取项目后,不需要先读完整 README,也不需要知道每个 skill 名字。

默认接法

当用户在这个仓库里随便发一句游戏设计、立项、体验分析、资料整理、翻译、工作流升级或策划案需求时,先走自然语言入口:

python -m gamedesignos ask "<用户原话>"

如果用户没有写 ask,也可以直接执行:

python -m gamedesignos "<用户原话>"

这个入口会做三件事:

  • 推荐应该使用的 skill,并给出可审计的 Use $skill-name ... 提示词;
  • ask 默认只做路由和状态审计;只有用户显式提供 --destination / --workspace,或明确调用 start,才创建或恢复 Project-Ready workspace。
  • 给宿主 agent 一个明确的下一步执行线索。

默认 workspace 会放在公开仓库外侧的相邻目录,避免把真实项目资料写进本仓库。

Agent 执行规则

ask 的输出不是最终答案,也不是让用户自己复制提示词。拿到推荐路线后,agent 要继续把事情办完:

  • 如果需求已经明显属于某个 skill,agent 可以直接读取并调用该 skill,不必先让用户知道 skill 名。
  • 如果只缺少输入材料或边界,agent 自己问最少的问题;用户补充后继续调用对应 skill。
  • 如果使用了 ask,就把它当作路由和状态审计:按推荐 skill 读取 SKILL.md,必要时读取该 skill 指向的 reference/template,然后直接产出结果。
  • 如果 ask 创建了 Project-Ready workspace,就把 workspace 当作长期项目记忆;后续产物写回对应的 decision、evidence、experiment、workflow 或 learning。
  • 最终回复给用户的是本次任务的成果、下一步动作或需要确认的 Human Gate,不是“你可以使用某某 skill”。

什么时候用整个项目

用户想长期推进一个项目时,使用 GameDesignOS 项目模式:

python -m gamedesignos start "<项目名或一句话想法>"

它会自动准备第一条 Decision、Assumption、三分钟验证 Experiment、VOI Gate 和 Workflow Run。下一步只做终端输出里的那件事。

每个 Skill 单独怎么用

用户只想要一次性产出时,可以直接点名对应 skill;如果用户没有点名但意图已经明确,agent 自己选择并调用即可:

用户说法 单独使用
截图、录屏、PV、视频、商店页、试玩样本 Use $game-experience-analyzer ...
一句话游戏创意、玩法点子、核心循环、立项方向 Use $game-concept-architect ...
留存、首局、节奏、反馈、具身感、氛围、认知负荷、A/B、埋点 Use $game-experience-density-optimizer ...
商业策划案、独游设计案、pitch、GDD、vertical slice、决策 memo Use $game-design-proposal-writer ...
prompt、workflow、schema、eval、router、memory、skill 改造 Use $paranoia-ai-system-evolver ...
英文游戏设计章节、术语表、长文翻译 Use $game-design-book-translator ...
文章、视频、作者、栏目、网站、知识库整理 Use $game-design-source-curator ...

如果不确定,先运行 python -m gamedesignos ask "<用户原话>",用它的推荐路线;如果会触发 Human Gate、发布、删除、真实账号、长期规则升级或项目范围锁定,再停下来问用户确认。

安全边界

  • 不把用户真实项目资料提交到公开仓库。
  • 不替用户接受 Human Gate、发布承诺、删除资产或锁定项目范围。
  • 不把一次实验结果直接升级成长期规则;先保持 candidate。
  • 不做镜像覆盖、批量删除、强制迁移旧 workspace。

Read the full file on GitHub · 69 lines

Changes

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.

  1. 7d ago First seen · 69 lines · 972 tokens per session scan A 7a3b39697a81

Subscribe to this mod's changes

GameDesignOS AGENTS.md is an instructions file published in the GitHub repository DY-2026/GameDesignOS (378 stars, last pushed 20d ago), licensed MIT. It adds 972 tokens to every session, about $0.0049 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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