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XLSX

XLSX is an agent skill (a SKILL.md file) from K-Dense-AI/claude-scientific-writer. Create, edit, analyze, or convert Excel spreadsheets (.xlsx, .xlsm, .xltx) where the workbook file is the primary deliverable. It works with Claude Code and Cursor and has 2,421 GitHub stars across a repository of 3 listed skills.

github.com/K-Dense-AI/claude-scientific-writer/skills/xlsx (opens in a new tab)

View on GitHub (opens in a new tab)

Add this skill

Claude

This repository is a Claude Code plugin marketplace. In Claude Code:

/plugin marketplace add K-Dense-AI/claude-scientific-writer
/plugin install claude-scientific-writer@claude-scientific-writer

In the Claude apps, zip the xlsx folder and upload it under Customize > Skills > + > Upload a skill (code execution must be on).

ChatGPT / Codex

Codex reads skills from .agents/skills/ in a repo or ~/.agents/skills/ for every project:

git clone --depth 1 https://github.com/K-Dense-AI/claude-scientific-writer.git
cp -r claude-scientific-writer/skills/xlsx .agents/skills/xlsx   # repo; ~/.agents/skills for all projects

Standalone skills also load in the ChatGPT desktop app.

Cursor

Cursor loads skills from .cursor/skills/ (or ~/.cursor/skills/) and also reads .claude/skills/:

git clone --depth 1 https://github.com/K-Dense-AI/claude-scientific-writer.git
cp -r claude-scientific-writer/skills/xlsx .cursor/skills/xlsx   # project; ~/.cursor/skills for all projects

Source (checked Oct 7, 2026): code.claude.com/docs/en/skills (opens in a new tab), code.claude.com/docs/en/plugin-marketplaces (opens in a new tab), support.claude.com/en/articles/12512180-using-skills-in-claude (opens in a new tab), learn.chatgpt.com/docs/build-skills (opens in a new tab), cursor.com/docs/context/skills (opens in a new tab)

What this skill does

Create, edit, analyze, or convert Excel spreadsheets (.xlsx, .xlsm, .xltx) where the workbook file is the primary deliverable. Use for formulas, formatting, financial models, multi-sheet workbooks, and tabular cleanup exported to Excel. Also applies to .csv/.tsv when the user wants spreadsheet output. Do NOT use for Word documents, HTML reports, standalone Python scripts, database pipelines, or Google Sheets API work.

When it triggers

  • Use for formulas, formatting, financial models, multi-sheet workbooks, and tabular cleanup exported to Excel.
  • use for Word documents, HTML reports, standalone Python scripts, database pipelines, or Google Sheets API work.

More skills in K-Dense-AI/claude-scientific-writer

3 skills are listed from this repository.

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FAQ

XLSX FAQ

Still curious? Email info@appsgit.com.

What is the XLSX skill?

XLSX is an agent skill (a SKILL.md file) from K-Dense-AI/claude-scientific-writer. Create, edit, analyze, or convert Excel spreadsheets (.xlsx, .xlsm, .xltx) where the workbook file is the primary deliverable. It works with Claude Code and Cursor and has 2,421 GitHub stars across a repository of 3 listed skills. Its SKILL.md lives at github.com/K-Dense-AI/claude-scientific-writer/skills/xlsx.

How do I install the XLSX skill?

In Claude Code, run /plugin marketplace add K-Dense-AI/claude-scientific-writer and then /plugin install claude-scientific-writer@claude-scientific-writer. For Codex or Cursor, copy the xlsx folder into .agents/skills/ or .cursor/skills/.

Is the XLSX skill free?

Yes. The repository is open source under the MIT license.

Is XLSX maintained?

The repository's most recent commit was on Sep 29, 2026. Its latest release is v2.22.0. appsgit only lists skills from repositories with a commit in the last six months.