Is the Book Editor skill free?

Yes. The skill itself is free from lfurze/claude-skills. SkillProof publishes the install command and an independent test verdict at no cost.

What is the Book Editor SkillProof Score?

9.6/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 9/10, docs & honesty 5/5.

How do I install Book Editor?

Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.

Can I use Book Editor with Cursor, Copilot, Gemini CLI, Codex or other AI tools?

The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.

Book Editor

Real docx track-changes and comments editing for manuscripts, via raw OOXML surgery

by lfurze · lfurze/claude-skills

Tested · Works

Install — copy the command Download source ↗

Test report

Verdict: Tested · Works
Score: 9.6/10
Tested: Jul 14, 2026
Environment: Claude Code 2.x (agent harness)
Upstream re-checked: Aug 10, 2026 · 8732350

Built a real 3-paragraph .docx and ran the skill's actual unzip/w:ins+w:del/comments.xml/rezip recipe by hand: produced a valid docx with genuine Word-readable track changes and a comment (confirmed via well-formed-XML checks and raw-XML inspection); the same task done the naive way — python-docx text overwrite, which has no track-changes API at all — silently destroyed the original text with zero accept/reject trail for the author.

Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works

Installs cleanly 5/5
Triggers reliably 5/5
Output vs. baseline 9/10
Docs & honesty 5/5

What Book Editor does

A structural/line/copy/polish four-pass manuscript editing workflow that produces genuine Word track changes and comments by unzipping the .docx, hand-editing document.xml with w:ins/w:del wrappers plus comments.xml, and rezipping — not a plain-text rewrite. Triggers on edit book, edit manuscript, proofread, copy edit, line edit, structural edit, developmental edit, or SPAG check requests.

How to install Book Editor

git clone https://github.com/lfurze/claude-skills
cd claude-skills
mkdir -p ~/.claude/skills
cp -r book-editor ~/.claude/skills/book-editor

Skills live in ~/.claude/skills/ (global) or .claude/skills/ (per-project). Restart Claude Code after installing.

Commands — how to trigger Book Editor

/book-editor Real docx track-changes and comments editing for manuscripts, via raw OOXML surgery

It also activates on plain-language prompts like these:

Edit my manuscript docx with real Word track changes
Leave editorial comments in this chapter without rewriting it
Mark up my book draft so my editor sees every change

Frequently asked questions

Is the Book Editor skill free?: Yes. The skill itself is free from lfurze/claude-skills. SkillProof publishes the install command and an independent test verdict at no cost.
Does Book Editor work with Claude Code?: We tested it with Claude Code 2.x (agent harness) on Jul 14, 2026. Verdict: Tested · Works. Built a real 3-paragraph .docx and ran the skill's actual unzip/w:ins+w:del/comments.xml/rezip recipe by hand: produced a valid docx with genuine Word-readable track changes and a comment (confirmed via well-formed-XML checks and raw-XML inspection); the same task done the naive way — python-docx text overwrite, which has no track-changes API at all — silently destroyed the original text with zero accept/reject trail for the author.
What is the Book Editor SkillProof Score?: 9.6/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 9/10, docs & honesty 5/5.
How do I install Book Editor?: Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
Can I use Book Editor with Cursor, Copilot, Gemini CLI, Codex or other AI tools?: The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.