game-concept

game-concept is a skill for Claude Code, Codex from zenstory-ai/novel-to-game. It costs 139 tokens per session (937 once invoked), scanned A, original, MIT.

A design process for deciding what a novel should become as a game. It uses the novel and a product brief to compare three different playable directions and choose one.

In plain words
What is it for?
Use it to compare game concepts, define the player's role and repeating activities, identify pressures and failure, and select a prototype direction.
Why use it?
It helps turn a story into actual player actions and trade-offs instead of stopping at a general adaptation idea.

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 compare game concepts, define the player's role and repeating activities, identify pressures and failure, and select a prototype direction.

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

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/zenstory-ai/novel-to-game/game-concept"><img src="https://agentmods.dev/badge/skills/zenstory-ai/novel-to-game/game-concept.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 139 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 937 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 $0.00139 $0.00937
Opus 5 $0.00069 $0.00468
Sonnet 5 $0.00028 $0.00187
Haiku 4.5 $0.00014 $0.00094

Measured 4d ago against content hash 6e933a4de634, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

game-concept 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 4d 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-concept/SKILL.md · 57 lines

What it actually says

游戏概念设计

决定做成什么游戏,不写代码、数值表或逐场关卡脚本。

读取 concept-method.md。输入必须包含 SOURCE_BIBLE.mdPRODUCT_BRIEF.md;缺任一项就停止并说明缺口,不代替上游补写。

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。

决策边界

直接继承 brief 已锁的平台、输入、受众、分级、时长、目标市场和非目标;发现它们与原作明显冲突 时回总入口修订,不在概念阶段静默改值。原作语言、文化语境、目标市场和界面语言分别处理,不从 其中一个自动推出另一个。

互动叙事是成熟玩法,不因以阅读和对白承载就降低标准;它的动词可以是读局面、追问、比对信息、 表态、隐瞒、交出与承担回响。先例提供语法,原作规则负责改变动作对象、顺序、代价和世界回应, 不能只做 IP 换皮。

概念还要判断验证形态:可用成熟交互语法表达时说明“已有语法 + 原作如何改变它”;核心依赖实时手感、 空间、视线、物理或独特操作时明确走自定义灰盒。不要把文本原型当所有体验的统一前置层,也不要因有 模板可用就让模板替原作决定玩法。

比较范围

先列 brief 的锁定维度和仍开放的维度,只比较能揭示真实取舍的方向,不凑概念数量或差异维度。 仅在方向仍开放时考察可信替代;用户已选定方向或不存在有效替代时说明原因,改为验证该方向的风险, 不重开选择。

选择

先按 concept-method 的硬否决逐个淘汰,不计算总分,再按其比较维度选择。quick 自动选证据最强的 方向;director 只对尚未决定的方向给出推荐并等待用户选择。

输出

生成一个 concepts/CONCEPT.md,只含:

  1. brief 锁定值与开放维度;
  2. 体验承诺及其可观察现象和失败现象;
  3. 紧凑先例说明;
  4. 候选概念卡:主类型、experienceProfile、借用/拒绝的玩法先例、核心动作与循环、压力、失败、 世界响应;说明玩家身份如何形成反复行动、执行阻力与可观察变化,不要求独立的固定键名。 仅当自然语言能体现玩家身份时写 signature_commandidlabel 与候选 intents,否则写 N/A; 最后说明原作张力如何由玩家亲手 enact、招牌画面、最小验证切片、最大风险 和否决观察;
  5. 硬否决结果、关键取舍、推荐与选择状态;
  6. 选定方向的玩家能动性合同、不可妥协体验承诺;
  7. 最小验证问题与开放问题。

narrative-ledhybrid 的叙事层还要选择一种分支结构语法并说明内容预算。交接前确认选定方向 可在 brief 范围内做成完整切片。

Files

What ships with it

2 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. 4d ago Changed · -10 tokens per session 6e933a4de634
  2. 7d ago Changed · -16 lines a8d321eb3d64
  3. 13d ago First seen · 73 lines · 149 tokens per session scan A 7080002eb9aa

Subscribe to this mod's changes

game-concept is a skill published in the GitHub repository zenstory-ai/novel-to-game (775 stars, last pushed yesterday), licensed MIT. It adds 139 tokens to every session and 937 once invoked, about $0.0007 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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