# XLSX (agent 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.

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.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/K-Dense-AI/claude-scientific-writer |
| Skill path | skills/xlsx/SKILL.md |
| Skill name | xlsx |
| GitHub stars | 2,421 |
| Installs on skills.sh | not listed |
| License | MIT |
| Skills in repo | 3 |
| Plugin marketplace | claude-scientific-writer |
| Official | no |
| Works with | Claude Code, Cursor |
| Category | Data & analysis |
| Last commit | Sep 29, 2026 |

## 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.

## Add this skill

### Claude Code

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

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

### ChatGPT / Codex

```sh
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
```

### Cursor

```sh
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
```

Sources (checked 2026-10-07): https://code.claude.com/docs/en/skills, https://support.claude.com/en/articles/12512180-using-skills-in-claude, https://learn.chatgpt.com/docs/build-skills, https://cursor.com/docs/context/skills

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Canonical page: https://appsgit.com/skills/k-dense-ai-xlsx
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