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 cabbage2000-lab/textbook-writer-skills --skill textbookgit clone --depth 1 https://github.com/cabbage2000-lab/textbook-writer-skillsWrote 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/cabbage2000-lab/textbook-writer-skills/textbook)<a href="https://agentmods.dev/skills/cabbage2000-lab/textbook-writer-skills/textbook"><img src="https://agentmods.dev/badge/skills/cabbage2000-lab/textbook-writer-skills/textbook/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/cabbage2000-lab/textbook-writer-skills/textbook"><img src="https://agentmods.dev/badge/skills/cabbage2000-lab/textbook-writer-skills/textbook.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00159 | $0.04716 |
| Opus 5.5 | $0.00064 | $0.01886 |
| Sonnet 5.5 | $0.00032 | $0.00943 |
| Haiku 4.5 | $0.00016 | $0.00472 |
Grade A, and why
textbook 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.
How it starts
The opening of the file, as written. The whole thing — 107 lines — stays where its author put it; the contents beside it link to each section on GitHub.
textbook
写教材的主 skill（orchestrator）：驱动五阶段流程，管理 .progress.json 状态实现中断可续，在阶段间传递交接契约，最终交付一本有主线、有梯度、可评估的多章节 Markdown 教材。契约、落盘布局、状态机的权威定义见 references/handoff-contract.md（下称"契约文档"）。
学科差异（题型集、验证手段、认知动词、章内段义）不在本 skill 里分支，收拢在学科档案中：阶段 1 判定一次，落盘为 .progress.json 的 subject_profile，逐章原样透传。规格与索引见 references/subject-profile-spec.md。
作者提供现有素材或要求修订项目内已完成章时，按 references/source-material-workflow.md 登记、切片和回写；无素材项目不增加材料提问或文件。素材仅为内容依据，不改变双 gate、答案验证和状态单一写者纪律。
何时不触发
- 单篇教程/图文教程（用 tutorial-writer）
- 只写一章或一篇深度文章（用 textbook-chapter）
- 只要例题/习题（用 textbook-exercises）
- 只做大纲不写正文（直接用 textbook-outline）
工作流总览
| 阶段 | 名称 | 执行者 | 产出 | Gate? |
|---|---|---|---|---|
| 1 | 教学定位确认 | textbook-outline | 学科/读者起点/深度/篇幅 → 00-教材设计.md | 否（一轮提问） |
| 2 | UbD 预期结果设计 | textbook-outline | UbD 五件套 | 是（核心 gate） |
| 3 | 评估与章节设计 | textbook-outline | 章节树+例题计划+梯度报告+表现性任务 | 是（次要 gate） |
| 4 | 章节正文编写 | textbook-chapter（逐章） | NN-章.md × N + 术语表增量 | 否 |
| 5 | 审核定稿 | 本 skill | 自检报告 + 00-前言.md + 99-表现性任务.md + 交付摘要 | 否 |
gate 之外的阶段只打印一行进度（格式见契约文档第 5 节），不打断作者。
启动与重入（每次触发的第一件事）
-
确定教材项目目录：用户指定则用之；未指定则询问一次（默认
./<教材名>/）。 -
找
.progress.json：- 不存在 → 全新项目：确认教材名 → 建目录 → 初始化
.progress.json（schema 见契约文档第 4 节，current_stage=1，gates 全 false，answer_layout="separate"，subject_profile待阶段 1 判定后补写）→ 从阶段 1 开始； - 存在 → 按契约文档第 4 节重入规则表定位续点，打印续写行：阶段 4 用
▶ 续写：<教材名>，从第 N 章继续，其余阶段用▶ 续写：<教材名>，从阶段 N 继续；同时读出subject_profile与answer_layout供后续透传，字段缺失时按存量语义兜底并在续写行后各补一句说明，不阻塞：subject_profile缺失（v0.3.x 及更早）按stem处理、补「按 stem 学科档案续写」；answer_layout缺失（v0.4.x 及更早）按inline处理、补「按内嵌答案排版续写」——已写的章不迁移答案，一本书两种排版比统一用旧排版更糟。特别地：current_stage=2/3且对应 gate 未确认时，从00-教材设计.md读出已有产出（阶段 2 为五件套、阶段 3 为章节树/例题习题计划/梯度报告/表现性任务四项）重新呈现并等确认，不推倒重做；作者提出修改时委托 textbook-outline 执行修改与再确认循环。
- 不存在 → 全新项目：确认教材名 → 建目录 → 初始化
-
状态纪律：
.progress.json只由本 skill 读写（子 skill 一律不碰）；每完成一个阶段、每完成一章立即更新写盘，绝不批量延迟。
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.
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.
- 8d ago Changed · +8 lines · -17 tokens per session 06f0e478a2b9
- 1mo ago Changed · +4 lines · +46 tokens per session 76520b4644aa
- 1mo ago First seen · 95 lines · 130 tokens per session scan A 6353dd314a0e
textbook is a skill published in the GitHub repository cabbage2000-lab/textbook-writer-skills (39 stars, last pushed 9d ago), licensed MIT. It adds 159 tokens to every session and 4,716 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.
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