game-build

game-build is a skill for Claude Code, Codex from zenstory-ai/novel-to-game. It costs 151 tokens per session (1,413 once invoked), scanned A, original, MIT.

A process for turning an approved game design into a playable whitebox or production game for its target device and runtime. A whitebox is a rough version used to test the most important design risk.

In plain words
What is it for?
Use it to build or specify prototypes and complete games, choose between template and custom implementation, and handle approved text, voice, and generated media requirements.
Why use it?
It keeps implementation aligned with the approved product, gameplay, visual, platform, and accessibility boundaries.

Skill for Claude CodeCodex

Written for Claude Code and Codex: shipped in a Claude Code plugin, but also agents/openai.yaml present.

Part of the novel-to-game plugin — 7 skills shipped together

Good fit Use it to build or specify prototypes and complete games, choose between template and custom implementation, and handle approved text, voice, and generated media requirements.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/zenstory-ai/novel-to-game/game-build
Install

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.

Any agent
npx skills add zenstory-ai/novel-to-game --skill game-build
Clone the repo
git clone --depth 1 https://github.com/zenstory-ai/novel-to-game

Made for: Claude Code, Codex.

Or install novel-to-game, the plugin that ships this one along with the rest of its 7 skills.

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 game-build

README.md
[![agentmods](https://agentmods.dev/badge/skills/zenstory-ai/novel-to-game/game-build/github.svg)](https://agentmods.dev/skills/zenstory-ai/novel-to-game/game-build)
Your own site
<a href="https://agentmods.dev/skills/zenstory-ai/novel-to-game/game-build"><img src="https://agentmods.dev/badge/skills/zenstory-ai/novel-to-game/game-build/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.

agentmods 80×15 button for game-build

Your own site · 80×15
<a href="https://agentmods.dev/skills/zenstory-ai/novel-to-game/game-build"><img src="https://agentmods.dev/badge/skills/zenstory-ai/novel-to-game/game-build.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 151 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,413 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00151 $0.01413
Opus 5.5 $0.00060 $0.00565
Sonnet 5.5 $0.00030 $0.00283
Haiku 4.5 $0.00015 $0.00141

Measured 8d ago against content hash 4a1b79ed036d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

game-build 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 8d 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

skills/game-build/SKILL.md · 75 lines

How it starts

The opening of the file, as written. The whole thing — 75 lines — stays where its author put it; the contents beside it link to each section on GitHub.

游戏构建执行

保护已批准的体验边界;正式生产时再保护已批准的美术边界。驱动实现模型完成真实可玩的候选,不在 构建阶段重新做概念、关卡或美术方向。

读取 build-brief-contract.md。白盒阶段必须已有 GAME_DESIGN.md; 完整候选还必须已有 ART_DIRECTION.md。缺产品决定时回对应 owner,不在 BUILD_BRIEF 就地发明。

产物语言由 PRODUCT_BRIEF.md 锁定;未锁定时跟随对话语言,不默认产出中文。

目标与自由

按 PRODUCT_BRIEF 锁定的平台、生产引擎、目标运行时、显示/输入、范围、分级和联网边界交付。 目标工具链不可用时不得自动改做网页;只有 brief 已批准替代运行时才可使用,并分开记录 targetRuntime、testedRuntime 与未覆盖项。

正式生产继承 ART_DIRECTION.md 的可观察视觉约束与批准目标图,在实际运行中验证焦点资产。

BUILD_BRIEF 只压缩产品边界、必须保真的体验事实、运行方式与完成证据,实现细节交给实现模型。

先声明 buildStage: whitebox|production 与 buildPath: template|custom。已有交互语法只有在能保留原作 独有动作、代价和世界回应时才采用;实时手感、空间、视线、物理或模板覆盖不了的核心动词走 custom。 白盒也必须选择能验证最大风险的形态,不能把所有项目降成文游。

当前会话能编码时直接实现;外部模型不可用时只交付构建说明,不声称游戏已生成。不要发送与原型 无关的完整受版权保护原文。

按能力读取可选合同

共同构建循环

  1. 先实现一个最小但完整的核心循环:启动、真实输入、状态变化、结果和重开。范围不足时修范围, 不先堆审计材料。
  2. 实现 GAME_DESIGN 的状态、动作与结果;使用生成模型时,模型只解释输入和结果,规则器拥有提交权。 存在 signature_command 时再执行可选合同的专属边界。
  3. 保留能复现问题的初态与输入路径,涉及随机性时固定 seed;修订后重放失败路径与相邻反例。 同一手感或表现问题连续两次修复无效时停止换方案,先查成熟作品处理同类问题的公开资料(开发者 演讲、技术复盘或开源实现),理解其原理后再实现。
  4. 回写实际工具链、install/build/start 命令和版本;未知值写 NOT_AVAILABLE: 原因,不猜。 实际候选与 GAME_DESIGN、ART_DIRECTION 的事实描述不符时,交回对应 owner 修订或在 BUILD_BRIEF 标明冲突, 不留下描述已不存在的玩法、表现或声音的文档。

whitebox 到此按 build-brief-contract「完成证据」运行最窄检查并交回 design owner;设计修订后 重放受影响路径,直到最大风险已被实际暴露或当前方向被否决。

production 继续:

  1. 提供一条权威验证命令和最小可观察状态,使 game-qa 能一次走完 clean start → 核心动作 → 设计结果 → restart。
  2. 运行最窄的开发检查与启动 smoke,修复构建失败、阻断日志、资源失败和崩溃;替代运行时未覆盖的 目标平台输入、性能、打包或设备项写入 limitation。
  3. 达到 brief 的 targetFinish;更高完成度只处理已批准的焦点资产和招牌时刻,不制造与可玩闭环 无关的发布审计。有批准目标图的界面与焦点资产,在目标视口截取实际运行画面与目标图并排比对, 逐项列出布局、比例、字体、色光与层级差异后修正;连续两轮没有改善就停止,把剩余差异写进 BUILD_BRIEF 的限制,不修改目标图去迁就实现。
  4. 交给 game-qa;诊断、复跑与事实源规则见契约「完成证据」。

Read the full file on GitHub · 75 lines

Files

What ships with it

7 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 8d ago Changed · +6 lines 4a1b79ed036d
  2. 24d ago Changed · +2 lines 895ab4669782
  3. 1mo ago Changed · -2 lines a3b01dfc8dff
  4. 1mo ago Changed · +1 lines 858623b8f652
  5. 1mo ago Changed · -17 lines 09d235ef85d5
  6. 1mo ago First seen · 85 lines · 151 tokens per session scan A 4aaf579704e8

Subscribe to this mod's changes

game-build is a skill published in the GitHub repository zenstory-ai/novel-to-game (933 stars, last pushed 7d ago), licensed MIT. It adds 151 tokens to every session and 1,413 once invoked, about $0.0006 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.