# XLSX

Excel workbooks with live formulas: build or edit .xlsx models with openpyxl...

- Repository: https://github.com/ginlix-ai/LangAlpha (2232 stars)
- Category: Documents
- License: Apache-2.0
- Last updated: 2026-11-01
- Runs scripts: yes, review before use

## Install

Claude Code: `npx skills add ginlix-ai/LangAlpha --skill xlsx -g -a claude-code -y`
Codex: `npx skills add ginlix-ai/LangAlpha --skill xlsx -g -a codex -y`
Cursor: `npx skills add ginlix-ai/LangAlpha --skill xlsx -g -a cursor -y`
Gemini CLI: `npx skills add ginlix-ai/LangAlpha --skill xlsx -g -a gemini-cli -y`

## Description

Excel workbooks with live formulas: build or edit .xlsx models with openpyxl, recalculate with IronCalc or LibreOffice, audit conventions, profile messy uploads, render for review

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

# XLSX

Build or edit an Excel workbook and write it into the task directory (e.g. `dcf_acme/acme_dcf.xlsx`). The user opens it in Excel, changes an input, and every dependent number moves. That is the whole point of the format: **a workbook the agent delivers is a model, not a table of results.** A cell that could be computed from other cells is a formula. A number typed into a formula's place is a defect, even when the value is right today.

This is the right output when the user wants something they will **keep working in**: a DCF, a comps sheet, a three-statement model, a screen they will re-sort, a schedule they will extend. It is the wrong output for a one-off table (put it in the chat or an HTML report) and for a document that will not be edited (see `.agents/skills/html-report/SKILL.md`).

> **User preferences override these defaults.** A house colour code, a template workbook, a sheet layout the user has described: those outrank every rule here. Inside a workbook the font colour code below outranks the general house palette in `ui-design` (green means a cross-sheet link here, not a gain). The rules below are for when nothing has been specified.

## Decide: Which Output?

| Want | Use |
|---|---|
| A model the user will edit, extend, or plug into their own workbook | **xlsx** (this skill) |
| A polished document to read, print, or share, possibly with charts | `html-report` |
| A dataset for another program | `.csv` via pandas, no styling |
| One table in the conversation | markdown table |

## Workflow

The rest: https://github.com/ginlix-ai/LangAlpha/blob/HEAD/plugins/langalpha_deliverables/skills/xlsx/SKILL.md