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Spreadsheets

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Use skill when user requests to create, modify, analyze, visualize, or work with spreadsheet files (`.xlsx`, `.xls`, `.csv`, `.tsv`) or Google Sheets with formulas, formatting, charts, tables, and recalculation. Do not use for live controlling Microsoft Excel app or a live Excel session.

OpenAI/Codex/plugins/spreadsheets/skills/spreadsheets/SKILL.md

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Network or broad shell
Last checked
Nov 10, 2026

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71,170
Repository last updated
Nov 10, 2026
License
CC0-1.0

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# Spreadsheets skill
Read entirely for spreadsheet creation, editing, analysis, or visualization.

## Decision Boundary
- Google Sheets targeted outputs also require `routing/google_sheets.md`. Otherwise, author local files with artifact tool.

## Important Instructions
- For new workbooks or authorized redesigns, plan the simplest correct workbook that meets the task, audience, actual data and domain. If formulas become hard to read, first reconsider whether the workbook's structure, layout, or logic is overcomplicated before simplifying individual formulas. Remove unnecessary or duplicated logic while preserving calculation correctness, required business relationships, and financial reconciliation
- Instruction precedence for workbook content, layout, and formatting is: user request > reference/template > domain defaults/conventions > general defaults.

## Tools + Contract Requirements
- Author the spreadsheet with `@oai/artifact-tool` JS and only `load_workspace_dependencies` executables/dependencies, never repo-local deps. If unavailable, check `~/.cache/codex-runtimes/codex-primary-runtime/dependencies/`. Never modify dependency directories.
- In a writable, conversation-specific or tmp directory, create a `node_modules` symlink or Windows junction to the loader `node_modules`.
- Prefer to patch/rerun one `.mjs` builder. No heredocs or duplicate builders.
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