Agent skill

XLSX

Use this skill any time a spreadsheet file is the primary input or output.

ProprietaryAuto-check passedDocuments & Office

Install XLSX

skills CLI

$ npx skills add mateaix/mateclaw --skill xlsx -a claude-code

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

GitHub CLI

$ gh skill install mateaix/mateclaw xlsx --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/mateaix/mateclaw.git skills-src && mkdir -p .claude/skills && cp -r skills-src/mateclaw-server/src/main/resources/skills/xlsx .claude/skills/xlsx && 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 "xlsx" agent skill from https://github.com/mateaix/mateclaw/tree/dev/mateclaw-server/src/main/resources/skills/xlsx into .claude/skills/xlsx/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "xlsx", 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/mateaix/mateclaw/tree/dev/mateclaw-server/src/main/resources/skills/xlsx

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 mateaix/mateclaw --skill xlsx -a codex

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

GitHub CLI

$ gh skill install mateaix/mateclaw xlsx --agent codex

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

Manual copy

$ git clone --depth 1 https://github.com/mateaix/mateclaw.git skills-src && mkdir -p .agents/skills && cp -r skills-src/mateclaw-server/src/main/resources/skills/xlsx .agents/skills/xlsx && 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 "xlsx" agent skill from https://github.com/mateaix/mateclaw/tree/dev/mateclaw-server/src/main/resources/skills/xlsx into .agents/skills/xlsx/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "xlsx", 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 mateaix/mateclaw --skill xlsx -a cursor

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

GitHub CLI

$ gh skill install mateaix/mateclaw xlsx --agent cursor

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

Manual copy

$ git clone --depth 1 https://github.com/mateaix/mateclaw.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/mateclaw-server/src/main/resources/skills/xlsx .cursor/skills/xlsx && 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 "xlsx" agent skill from https://github.com/mateaix/mateclaw/tree/dev/mateclaw-server/src/main/resources/skills/xlsx into .cursor/skills/xlsx/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "xlsx", 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/mateaix/mateclaw.git --path mateclaw-server/src/main/resources/skills/xlsx

--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 mateaix/mateclaw --skill xlsx -a gemini-cli

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

GitHub CLI

$ gh skill install mateaix/mateclaw xlsx --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/mateaix/mateclaw.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/mateclaw-server/src/main/resources/skills/xlsx .gemini/skills/xlsx && 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 "xlsx" agent skill from https://github.com/mateaix/mateclaw/tree/dev/mateclaw-server/src/main/resources/skills/xlsx into .gemini/skills/xlsx/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "xlsx", 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 mateaix/mateclaw xlsx

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 mateaix/mateclaw --skill xlsx -a github-copilot

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

Manual copy

$ git clone --depth 1 https://github.com/mateaix/mateclaw.git skills-src && mkdir -p .github/skills && cp -r skills-src/mateclaw-server/src/main/resources/skills/xlsx .github/skills/xlsx && 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 "xlsx" agent skill from https://github.com/mateaix/mateclaw/tree/dev/mateclaw-server/src/main/resources/skills/xlsx into .github/skills/xlsx/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "xlsx", 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 mateaix/mateclaw --skill xlsx -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 mateaix/mateclaw xlsx --agent opencode

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

Manual copy

$ git clone --depth 1 https://github.com/mateaix/mateclaw.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/mateclaw-server/src/main/resources/skills/xlsx .opencode/skills/xlsx && 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 "xlsx" agent skill from https://github.com/mateaix/mateclaw/tree/dev/mateclaw-server/src/main/resources/skills/xlsx into .opencode/skills/xlsx/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "xlsx", 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: xlsx
GitHub stars: 1.1k
Token cost: ~1.5k tokens
SKILL.md length: 491 words
Files: 59 (incl. scripts)
Skills in repo: 17
Repo updated: Oct 5, 2026
First seen: Oct 7, 2026
Licence: Proprietary

At a glance

Use this skill any time a spreadsheet file is the primary input or output.

Works in 6 steps: Choose tool: pandas for data, openpyxl… → Create/Load: Create new workbook or load… → Modify: Add/edit data, formulas, and… → …
Restructuring messy tabular data
SKILL.md covers All Excel files, Financial Models, Prerequisites and CRITICAL: Use Formulas, Not…, plus 7 more sections
Runs Python scripts from its folder; calls python

What it does

XLSX is an agent skill from mateaix/mateclaw. Use this skill any time a spreadsheet file is the primary input or output. This means any task where the user wants to: open, read, edit, or fix an existing .xlsx, .xlsm, .csv, or .tsv file; create a new spreadsheet from scratch or from other data sources; or convert between tabular file formats. Also trigger for cleaning or restructuring messy tabular data. The deliverable must be a spreadsheet file.

Its SKILL.md is about 1.5k tokens, which your agent loads only when the skill is triggered. The skill folder holds 63 other files, including scripts (for example `scripts/office/helpers/__init__.py`, `scripts/office/helpers/merge_runs.py` and `scripts/office/helpers/simplify_redlines.py`).

It sits in Documents & Office, covering Excel spreadsheets and CSV and tabular files. It works with Microsoft Excel, openpyxl and pandas. The repository describes itself as: 🤖 MateClaw — Your second brain with Multi-Agent Orchestration, MCP Protocol, Skills & Memory, Dream, and Multi-Channel Support. Built on Spring AI Alibaba.

When your agent uses it

Restructuring messy tabular data
Tasks that involve Excel spreadsheets
Tasks that involve CSV and tabular files

Example prompts

“/xlsx”

Requirements

Python 3

Workflow steps

6 steps, taken from the first numbered list in SKILL.md.

Choose tool: pandas for data, openpyxl for formulas/formatting
Create/Load: Create new workbook or load existing file
Modify: Add/edit data, formulas, and formatting
Save: Write to file
Recalculate formulas (MANDATORY IF USING FORMULAS)
Verify and fix any errors

What it can do on your machine

Read from SKILL.md and the folder at commit 3b5f7de. 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
Ships 14 files in scripts/ (Python, from the files we listed), which the agent can run.
Shell commands in SKILL.md call:
- python
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
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

XLSX loads about 1.5k tokens when it runs. Until then it costs about 102 tokens; SKILL.md has 491 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~102
When it runs · the whole SKILL.md, loaded when a task matches: ~1.5k

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); the scripts in this folder are not scanned.

SKILL.md

Its licence (Proprietary) doesn't allow us to republish the file, so here is its outline and opening line. It has 491 words (~1,540 tokens).

“Always use Excel formulas instead of calculating values in Python and hardcoding them.”

— opening of SKILL.md by mateaix, Proprietary

name: xlsx
dependencies.commands: python3
dependencies.tools: skillScriptTool, skillFileTool
platforms: macos, linux, windows

Outline of SKILL.md

Requirements for Outputs
All Excel files
Professional Font
Zero Formula Errors
Preserve Existing Templates
Financial Models
Color Coding Standards
Number Formatting Standards
Formula Construction Rules
XLSX creation, editing, and analysis
Prerequisites
CRITICAL: Use Formulas, Not Hardcoded Values
WRONG - Hardcoding
CORRECT - Using Formulas
Common Workflow
Reading and Analyzing Data
Data analysis with pandas
Excel File Workflows
Creating new Excel files
Editing existing Excel files
Unpack/Pack Workflow (Advanced XML editing)
Recalculating Formulas
Interpreting recalc.py Output
Formula Verification Checklist
Essential Verification
Common Pitfalls
Best Practices
Library Selection
Working with openpyxl

Read the full SKILL.md on GitHub

Files

SKILL.md and 58 other files (scripts) in mateclaw-server/src/main/resources/skills/xlsx of mateaix/mateclaw.

SKILL.md
LICENSE.txt
scripts/office/helpers/__init__.py
scripts/office/helpers/merge_runs.py
scripts/office/helpers/simplify_redlines.py
scripts/office/pack.py
scripts/office/schemas/ISO-IEC29500-4_2016/dml-chart.xsd
scripts/office/schemas/ISO-IEC29500-4_2016/dml-chartDrawing.xsd
scripts/office/schemas/ISO-IEC29500-4_2016/dml-diagram.xsd
scripts/office/schemas/ISO-IEC29500-4_2016/dml-lockedCanvas.xsd
scripts/office/schemas/ISO-IEC29500-4_2016/dml-main.xsd
scripts/office/schemas/ISO-IEC29500-4_2016/dml-picture.xsd
scripts/office/schemas/ISO-IEC29500-4_2016/dml-spreadsheetDrawing.xsd
scripts/office/schemas/ISO-IEC29500-4_2016/dml-wordprocessingDrawing.xsd
scripts/office/schemas/ISO-IEC29500-4_2016/pml.xsd
scripts/office/schemas/ISO-IEC29500-4_2016/shared-additionalCharacteristics.xsd
… and 43 more

Open the folder on GitHubat commit 3b5f7de

Compare with similar skills

XLSX 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.

XLSX compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
XLSX this skillmateaix/mateclaw	1.1k	—	~1.5k	Automated safety check: Pass	Proprietary	2 days ago
Create Spreadsheettheexperiencecompany/gaia	308	—	~804	Automated safety check: Pass	Custom licence	today
Spreadsheetdavila7/claude-code-templates	32k	1 repos	~1.3k	Automated safety check: Notes	Apache-2.0	today
Streaming Export Safetydoccker/cc-use-exp	1.1k	—	~1.9k	Automated safety check: Pass	Custom licence	1 mo ago
Openai Spreadsheettrailofbits/skills-curated	512	—	~1.3k	Automated safety check: Notes	CC-BY-SA-4.0	2 mo ago
TableauLeoYeAI/openclaw-master-skills	2.2k	—	~4.8k	Automated safety check: Pass	MIT	2 mo ago

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Questions about XLSX

What does XLSX do?

Use this skill any time a spreadsheet file is the primary input or output. XLSX is an agent skill from mateaix/mateclaw. Use this skill any time a spreadsheet file is the primary input or output.

When should I use XLSX?

XLSX fits situations like: restructuring messy tabular data; tasks that involve Excel spreadsheets; tasks that involve CSV and tabular files.

How do I install XLSX in Claude Code?

Run `npx skills add mateaix/mateclaw --skill xlsx -a claude-code`. Or copy the skill folder (mateclaw-server/src/main/resources/skills/xlsx in mateaix/mateclaw) into .claude/skills/xlsx in your project. Claude Code loads it when a task matches its description.

How do I install XLSX in Codex?

Run `npx skills add mateaix/mateclaw --skill xlsx -a codex`. Or copy the skill folder (mateclaw-server/src/main/resources/skills/xlsx in mateaix/mateclaw) into .agents/skills/xlsx in your project. Codex loads it when a task matches its description.

Can I use XLSX 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 mateaix/mateclaw --skill xlsx -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/xlsx, .gemini/skills/xlsx, .github/skills/xlsx and .opencode/skills/xlsx in your project.

What does XLSX need to run?

Going by SKILL.md and its folder, XLSX needs Python for the scripts in its folder and the command-line tools its instructions call (python). Our summary lists: Python 3.

Does XLSX access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is XLSX 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. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.

What licence does XLSX use?

XLSX carries a proprietary licence (from the LICENSE file in the skill folder). It is published on GitHub, but it is not open source: read the licence file before using or sharing it.

How many tokens does XLSX use?

About 1.5k tokens (SKILL.md is roughly 6.2k 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 XLSX?

Skills that share tags, products or a category with XLSX: Create Spreadsheet (theexperiencecompany/gaia, 308 stars), Spreadsheet (davila7/claude-code-templates, 32k stars), Streaming Export Safety (doccker/cc-use-exp, 1.1k stars) and Openai Spreadsheet (trailofbits/skills-curated, 512 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains XLSX?

mateaix (a GitHub user) maintains it in mateaix/mateclaw, which has 1,147 GitHub stars. The repository holds 17 skills in this directory. The repository was last updated on October 5, 2026.

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

XLSX

Install XLSX

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

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

Create Spreadsheet

Spreadsheet

Streaming Export Safety

Openai Spreadsheet

Tableau

Excel Spreadsheet Creation and Editing

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Questions about XLSX

Install XLSX

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

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

More from mateaix/mateclaw

Related

Questions about XLSX