Agent skill

Docx4j

A skill your agent uses when writing Java code that creates, reads or edits Word (.docx), PowerPoint (.pptx) or Excel (.xlsx) files with docx4j — including generating documents, editing existing…

No licenceAuto-check passedDocuments & Office

Install Docx4j

skills CLI

$ npx skills add plutext/docx4j --skill docx4j -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install plutext/docx4j docx4j --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/plutext/docx4j.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/docx4j .claude/skills/docx4j && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "docx4j" agent skill from https://github.com/plutext/docx4j/tree/VERSION_17_2_1/.claude/skills/docx4j into .claude/skills/docx4j/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "docx4j", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/plutext/docx4j/tree/VERSION_17_2_1/.claude/skills/docx4j

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add plutext/docx4j --skill docx4j -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install plutext/docx4j docx4j --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/plutext/docx4j.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/docx4j .agents/skills/docx4j && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "docx4j" agent skill from https://github.com/plutext/docx4j/tree/VERSION_17_2_1/.claude/skills/docx4j into .agents/skills/docx4j/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "docx4j", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add plutext/docx4j --skill docx4j -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install plutext/docx4j docx4j --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/plutext/docx4j.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/docx4j .cursor/skills/docx4j && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "docx4j" agent skill from https://github.com/plutext/docx4j/tree/VERSION_17_2_1/.claude/skills/docx4j into .cursor/skills/docx4j/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "docx4j", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/plutext/docx4j.git --path .claude/skills/docx4j

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add plutext/docx4j --skill docx4j -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install plutext/docx4j docx4j --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/plutext/docx4j.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/docx4j .gemini/skills/docx4j && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "docx4j" agent skill from https://github.com/plutext/docx4j/tree/VERSION_17_2_1/.claude/skills/docx4j into .gemini/skills/docx4j/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "docx4j", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install plutext/docx4j docx4j

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add plutext/docx4j --skill docx4j -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/plutext/docx4j.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/docx4j .github/skills/docx4j && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "docx4j" agent skill from https://github.com/plutext/docx4j/tree/VERSION_17_2_1/.claude/skills/docx4j into .github/skills/docx4j/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "docx4j", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add plutext/docx4j --skill docx4j -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install plutext/docx4j docx4j --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/plutext/docx4j.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/docx4j .opencode/skills/docx4j && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "docx4j" agent skill from https://github.com/plutext/docx4j/tree/VERSION_17_2_1/.claude/skills/docx4j into .opencode/skills/docx4j/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "docx4j", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: docx4j
GitHub stars: 2.4k
Token cost: ~2.5k tokens
SKILL.md length: 1,171 words
Files: 1
Skills in repo: 1
Repo updated: Oct 7, 2026
First seen: Oct 7, 2026
Licence: None found

At a glance

A skill your agent uses when writing Java code that creates, reads or edits Word (.docx), PowerPoint (.pptx) or Excel (.xlsx) files with docx4j — including generating documents, editing existing…

Works in 8 steps: Get the dependency and imports right first → Orientation: three layers → The recipes worth knowing → …
Writing Java code that creates
SKILL.md covers 1. Get the dependency and…, 2. Orientation: three layers, 3. The recipes worth knowing and 4. Editing someone else's…, plus 4 more sections
Calls soffice; reaches schemas.openxmlformats.org

What it does

Docx4j is an agent skill from plutext/docx4j. Use when writing Java code that creates, reads or edits Word (.docx), PowerPoint (.pptx) or Excel (.xlsx) files with docx4j — including generating documents, editing existing ones, tracked changes, styles, numbering, mail-merge-like content, and docx→PDF/HTML conversion. Also use when the user asks how to merge or concatenate docx/pptx, embed OLE objects, or asks which docx4j artifact or JAXB runtime to depend on.

Its SKILL.md is about 2.5k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Documents & Office, covering Word documents, PowerPoint presentations and Excel spreadsheets. It works with Microsoft PowerPoint, Microsoft Excel, Microsoft Word and Java. The repository describes itself as: JAXB-based Java library for Word docx, Powerpoint pptx, and Excel xlsx files.

When your agent uses it

Writing Java code that creates
Edits Word (.docx)
PowerPoint (.pptx)
Excel (.xlsx) files with docx4j — including generating documents

Example prompts

“/docx4j”

Workflow steps

8 steps, taken from the step headings in SKILL.md.

Get the dependency and imports right first
Orientation: three layers
The recipes worth knowing
Editing someone else's document: decide before you code
Tracked changes
Verify before declaring success
What is not in open-source docx4j
Frequent wrong answers

What it can do on your machine

Read from SKILL.md and the folder at commit 0e8e763. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
- soffice
From the folder's file list and the shell code blocks in SKILL.md.
Network
Hosts in commands or code, which the agent is likely to contact:
- schemas.openxmlformats.org
Also links to:
- plutext.com
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Docx4j loads about 2.5k tokens when it runs. Until then it costs about 106 tokens; SKILL.md has 1,171 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~106
When it runs · the whole SKILL.md, loaded when a task matches: ~2.5k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Without a licence we can't republish the file, so here is its outline and opening line. It has 1,171 words (~2,518 tokens).

“This skill is for writing code that uses docx4j as a library. If you are working on docx4j itself, read CLAUDE.md in the repository root instead — it covers the module map, build, and internal architecture, and is the authority…”

— opening of SKILL.md by plutext

name: docx4j

Read the full SKILL.md on GitHub

Files

Just SKILL.md in .claude/skills/docx4j of plutext/docx4j.

Open the folder on GitHubat commit 0e8e763

Compare with similar skills

Docx4j next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Docx4j compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Docx4j this skillplutext/docx4j	2.4k	—	~2.5k	Automated safety check: Pass	None	today
MarkitdownImCa0/just-laws	781	14 repos	~3.2k	Automated safety check: Notes	MIT	yesterday
Cyber Pptcrazyykhllc-bit/CyberPPT	1.8k	—	~10k	Automated safety check: Pass	MIT	2 mo ago
Markitshift-labs-ai/markit	1.3k	—	~299	Automated safety check: Pass	MIT	1 mo ago
Markitdownjimmc414/Kosmos	594	2 repos	~1.7k	Automated safety check: Pass	None	4 days ago
Liteparsebastani-inc/atomic	846	—	~1.4k	Automated safety check: Pass	MIT	today

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Works with

Questions about Docx4j

What does Docx4j do?

A skill your agent uses when writing Java code that creates, reads or edits Word (.docx), PowerPoint (.pptx) or Excel (.xlsx) files with docx4j — including generating documents, editing existing…. Docx4j is an agent skill from plutext/docx4j.xlsx) files with docx4j — including generating documents, editing existing ones, tracked changes, styles, numbering, mail-merge-like content, and docx→PDF/HTML conversion.

When should I use Docx4j?

Docx4j fits situations like: writing Java code that creates; edits Word (.docx); powerPoint (.pptx); excel (.xlsx) files with docx4j — including generating documents.

How do I install Docx4j in Claude Code?

Run `npx skills add plutext/docx4j --skill docx4j -a claude-code`. Or copy the skill folder (.claude/skills/docx4j in plutext/docx4j) into .claude/skills/docx4j in your project. Claude Code loads it when a task matches its description.

How do I install Docx4j in Codex?

Run `npx skills add plutext/docx4j --skill docx4j -a codex`. Or copy the skill folder (.claude/skills/docx4j in plutext/docx4j) into .agents/skills/docx4j in your project. Codex loads it when a task matches its description.

Can I use Docx4j in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add plutext/docx4j --skill docx4j -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/docx4j, .gemini/skills/docx4j, .github/skills/docx4j and .opencode/skills/docx4j in your project.

What does Docx4j need to run?

Going by SKILL.md and its folder, Docx4j needs the command-line tools its instructions call (soffice).

Does Docx4j access the network?

SKILL.md names 2 domains. In commands or code: schemas.openxmlformats.org; the agent is likely to contact it when it follows the instructions. As links in the text: plutext.com. This is read from the text; nothing was executed.

Is Docx4j safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Docx4j use?

No licence was found for Docx4j or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Docx4j use?

About 2.5k tokens (SKILL.md is roughly 10k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Docx4j?

Skills that share tags, products or a category with Docx4j: Markitdown (ImCa0/just-laws, 781 stars), Cyber Ppt (crazyykhllc-bit/CyberPPT, 1.8k stars), Markit (shift-labs-ai/markit, 1.3k stars) and Markitdown (jimmc414/Kosmos, 594 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Docx4j?

plutext (a GitHub user) maintains it in plutext/docx4j, which has 2,386 GitHub stars. The repository was last updated on October 7, 2026.

Source: plutext/docx4j on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Docx4j

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Files

Compare with similar skills

Similar skills

Markitdown

Cyber Ppt

Markit

Markitdown

Liteparse

Document

Related

Questions about Docx4j