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 textbook-initgit 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-init)<a href="https://agentmods.dev/skills/cabbage2000-lab/textbook-writer-skills/textbook-init"><img src="https://agentmods.dev/badge/skills/cabbage2000-lab/textbook-writer-skills/textbook-init/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-init"><img src="https://agentmods.dev/badge/skills/cabbage2000-lab/textbook-writer-skills/textbook-init.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 | $0.00155 | $0.01650 |
| Opus 5 | $0.00077 | $0.00825 |
| Sonnet 5 | $0.00031 | $0.00330 |
| Haiku 4.5 | $0.00015 | $0.00165 |
Grade A, and why
textbook-init 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 6d 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 — 80 lines — stays where its author put it; the contents beside it link to each section on GitHub.
textbook-init
动笔前的工作目录规划师：一轮提问弄清作者要写一本还是多本、放在哪里、要不要版本管理，呈现目录方案等确认后创建目录骨架（可含 git 仓库与 README 工作说明），最后把作者交给 textbook 主流程开写。教材项目内部的文件构成以 ../textbook/references/handoff-contract.md（下称"契约文档"）第 3 节为唯一权威定义，本 skill 只引用不重复定义。
何时不触发
- 已有教材项目要续写（目录里有
.progress.json）——直接用 textbook，它会按状态文件定位续点； - 作者直接开写、不关心目录规划——textbook 启动时自会询问一次并默认
./<教材名>/，无需先走本 skill； - 整理与教材写作无关的目录——本 skill 只服务教材项目的开局。
与流水线的关系
本 skill 只独立触发：不被 textbook 调度，不进五阶段契约链，产出是"就绪的空工作目录 + 启动指引"。
流水线文件一律不建不改：.progress.json（主 skill 是唯一写者，这是项目红线）、00-前言.md（阶段 5 派生生成）、00-教材设计.md（textbook-outline 写入）、NN-<章标题>.md（逐章生成）、98-参考答案.md（逐章追加）、99-表现性任务.md（阶段 5 派生生成）、术语表.md（主 skill 追加维护）。动机：主 skill 的重入判定靠"这些文件存不存在、内容有没有"定位续点（契约文档第 4 节），预建空文件会让它把全新项目误判成半成品；空壳文件混进交付物也违背"交付即可用"的底线。本 skill 创建的只有目录本身、.gitignore 和 README 工作说明——均在契约之外。
工作流
第 1 步：一轮提问
用 AskUserQuestion 一轮收集四项（触发语已说明的项不再问）：
- 教材名：如《线性代数入门》——将成为项目目录名；
- 规划范围：a) 只写这一本 b) 未来还会写多本（追加：工作区名，默认"教材工作区"）；
- 位置：项目/工作区建在哪个目录下，默认当前目录
./； - git 版本管理：默认要（教材写作周期以周计，版本保护值回票价）；作者明确不要则跳过。
若当前环境没有 AskUserQuestion 工具，降级为编号提问并等待文本回复：
请回答以下问题（回复格式如 "1 线性代数入门 2b 教材工作区 3 ./ 4 要"）：
1. 教材名？
2. 规划范围？ a) 只写这一本 b) 未来还会写多本（请给工作区名，默认"教材工作区"）
3. 建在哪个目录下？（默认当前目录 ./）
4. 要 git 版本管理吗？（默认要）
按语义宽松解析回复，只就有歧义的一项追问。
第 2 步：方案呈现与确认
按 references/workspace-layout.md 第 1、2 节的布局规则组装方案，完整呈现后停下：
- 目录树预览：含流水线随后会生成的文件，逐项注明"由 textbook 流水线创建"——让作者看到最终形态，同时不误以为本 skill 会建它们；
- 关键选择及理由：单本还是工作区分层、git 建在哪一层、
.gitignore为什么不忽略.progress.json； - 停点格式沿用契约文档第 5 节：
⏸ 等待确认：工作目录方案（回复"确认"开始创建，或直接提出修改）
作者提出修改 → 更新方案后重新完整呈现再等确认，循环直到明确确认；"确认，但把位置改一下"这类混合答复按修改分支处理（修改优先于确认，判定语义同契约文档第 5 节）。确认前不创建任何东西。
第 3 步：创建与交接
- 建目录：按确认的方案
mkdir -p； - git 判重：在目标位置检查是否已处于某个 git 仓库内（方法见 references/workspace-layout.md 第 3 节）——已在，则跳过 git init 并向作者说明原因；
- git 初始化（作者要 git 且未命中判重）：git init + 写
.gitignore+ 首次提交，层级与内容规范见 references/workspace-layout.md 第 3、4 节； - README 工作说明：按 references/workspace-layout.md 第 5 节模板实例化——所有字段填当前项目的真实值，写完通读确认没有残留尖括号或待填空白；
- 打印成果与下一步指引：
What ships with it
1 file 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.
- 6d ago Changed · +4 lines · +13 tokens per session 4ba39b4cdbd5
- 10d ago First seen · 76 lines · 142 tokens per session scan A 0e86b969ebbc
textbook-init is a skill published in the GitHub repository cabbage2000-lab/textbook-writer-skills (27 stars, last pushed 7d ago), licensed MIT. It adds 155 tokens to every session and 1,650 once invoked, about $0.0008 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.
Other skills, from other repositories
diffler
Generate and deliver a graded comprehension quiz from the current Git branch diff, either in the local terminal or through Google Forms. Use when a user asks to prove, test, or verify understanding of branch changes, a feature branch, or a pull request.
study-deps
Use when pulling upstream source or cloning a dependency at its installed version to study internals, read code, or create pinned worktrees.
baoyu-comic
A tool for creating original educational comics that explain knowledge or ideas through multiple illustrated panels. It supports different art styles and tones and can create several comics in one batch.
skill-creation-walkthrough
Step-by-step guide for creating your own Claude Skills, from deciding whether a skill is the right tool to writing the SKILL.md file, structuring reference material, and making it trigger reliably. Use when you want to package a workflow, framework, or repeated task into a reusable Skill, when an existing skill is not…
git-workflow
A guide for handling Git repository work safely, including status checks, branches, commits, pushes, pull requests, and rebasing. Git is a version-control system that records code changes and coordinates work between developers.
history-portability
Import Claude Code or Codex history and move complete CCAM datasets between machines. Use when rescanning provider history, importing a copied directory, uploading JSONL or archives, exporting a backup, restoring it idempotently, or verifying that tokens, workflows, runs, rules, and pricing survived.