XLSX
Build, clean, and analyze spreadsheets without dumping raw CSV into the chat.
Any agent Claude ChatGPT Grok ExcelCSVtables
What it is
XLSX handles workbooks, formulas, and multi-sheet cleanup. The agent should write a real file, not a markdown table pretending to be Excel.
When to use
Use when the user names a spreadsheet, a CSV, or a multi-tab workbook.
How to install
Install xlsx/SKILL.md and keep Python excel libraries available in the agent environment.
# Claude Code
.claude/skills/xlsx/SKILL.md
# Grok Build
.grok/skills/xlsx/SKILL.md
# Codex
.agents/skills/xlsx/SKILL.mdExample prompt
Merge these three CSVs on sku, drop duplicate rows, and write inventory.xlsx.
Source: Open Agent Skills ecosystem