What is book_map.update?

A book-structure maintenance workflow for keeping a book map and its chapter files in the same order. A book map is a file that defines a book's chapter outline and related file names.

Use it to renumber chapters, align a detailed table of contents with a shorter one, update the roadmap, rename lecture and tutorial files, and fix their references.

Reordering chapters can leave numbering, tables, file names, and links inconsistent. This workflow plans the changes first and updates those related parts together after approval.

book_map.update — Skill for Claude Code by causify-ai/helpers

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 causify-ai/helpers --skill book_map.update

Clone the repo

git clone --depth 1 https://github.com/causify-ai/helpers

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/causify-ai/helpers/book_map.update/github.svg)](https://agentmods.dev/skills/causify-ai/helpers/book_map.update)

Your own site

<a href="https://agentmods.dev/skills/causify-ai/helpers/book_map.update"><img src="https://agentmods.dev/badge/skills/causify-ai/helpers/book_map.update/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/causify-ai/helpers/book_map.update"><img src="https://agentmods.dev/badge/skills/causify-ai/helpers/book_map.update.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 26 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,246 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.

Origin 91% copy Near-identical to another mod 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.

Model	Per session	Once invoked
Fable 5.1	$0.00026	$0.02246
Opus 5.5	$0.00010	$0.00898
Sonnet 5.5	$0.00005	$0.00449
Haiku 4.5	$0.00003	$0.00225

Measured 19d ago against content hash 5ceb10a5d06a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

book_map.update 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 19d 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

This is a copy

91% identical to book_map.update — 12 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.claude/skills/book_map.update/SKILL.md · 185 lines

How it starts

The opening of the file, as written. The whole thing — 185 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Goal

Given a book map <BOOK_MAP> (e.g., book_Modern_AI_for_Finance/book_map.md), make it follow .claude/skills/book_map.rules.md:
- Renumber the chapters
- Reorder # Detailed TOC to follow ## Short TOC
- Keep the Roadmap table in sync
- Rename the numbered files in <BOOK>/lectures_source/ and <BOOK>/tutorials/, and fix the references to them
Write a plan, wait for the user to approve it, then apply it

Inputs

<BOOK_MAP>: the book map to update
<BOOK>: the directory that contains <BOOK_MAP>

Workflow

Read

Read .claude/skills/book_map.rules.md and <BOOK_MAP> in full
Use .claude/templates/book_map.template.md for the structure of new chapters
Follow .claude/skills/markdown.rules.md and .claude/skills/text.rules.md for any text you add

Compute the New Numbers

## Short TOC is the source of truth for the order of the chapters, the parts, and the part names
- Do not trust the chapter numbers in the file
Match chapters across Short TOC, Detailed TOC, and Roadmap by title
- Treat titles that differ only in case, and, or a trailing s as equal
Number the chapters 01, 02, ... in Short TOC order, with no gaps
- Number the entries marked ? too
Keep the map old number -> new number

Map the Files

Look recursively in <BOOK>/lectures_source/ and <BOOK>/tutorials/
A name is numbered when Lesson or L is followed by <NN> and . or _
- E.g., Lesson05.01_Forecasting.smd, L05_forecasting/, L05_01_forecasting.ipynb, figures/L05.01.Drawdown.png
Skip __pycache__/, *.pyc, *.log, OLD/, old/, and names with no number
Assign each file to a chapter:
- First by the file name in the Roadmap, ### Slides, or ### Tutorials
- Then by the old number in the name
Build the new name by replacing only <NN>
- Keep <MM>, the title, and the extension
Do not rename a file when the two rules disagree or no chapter matches: ask under ## Questions

Read the full file on GitHub · 185 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.

19d ago First seen · 185 lines · 26 tokens per session scan A 5ceb10a5d06a

Subscribe to this mod's changes

book_map.update is a skill published in the GitHub repository causify-ai/helpers (0 stars, last pushed 5d ago), licensed Apache-2.0. It adds 26 tokens to every session and 2,246 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 91% identical to book_map.update, differing in 12 lines, and is treated as a copy.

Planning Writing and docs

book_map.update next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
book_map.updatecausify-ai/helpers	Skill	0	5d ago	Apache-2.0	A	26	Claude Code
imagegenopenai/codex	Skill	134k	today	Apache-2.0	A	113	Codex
local-ai-agentsmicrosoft/ai-agents-for-beginners	Skill	79k	today	MIT	A	200	Claude Code, Codex
playwright-climicrosoft/playwright	Skill	99k	today	Apache-2.0	A	19	Claude Code
systematic-debuggingobra/superpowers	Skill	314k	3d ago	MIT	A	21	Claude Code
next-cache-components-adoptionvercel/next.js	Skill	143k	today	MIT	A	95	Claude Code
chat-pet-sprite-creationmicrosoft/vscode	Skill	195k	today	MIT	A	53	Claude Code, Codex