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excel-live-control

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Control an open or active Microsoft Excel workbook through the ChatGPT add-in or connected session. Use when the user tags the Microsoft Excel app in Codex or follows up on an established live Excel task. Do not use for standalone spreadsheet files or Google Sheets.

OpenAI/Codex/plugins/spreadsheets/skills/excel-live-control/SKILL.md

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Last checked
Nov 10, 2026

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Repository last updated
Nov 10, 2026
License
CC0-1.0

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# Excel Live Control

Inspect, edit, analyze, format, and verify the workbook in the selected live Microsoft Excel session. Use connected-document tools for workbook reads and writes; use Computer Use only for application setup, target confirmation, and focus management.

On initial entry, complete the setup gates in order before session discovery. On follow-ups, reuse only the verified target and rediscover after workbook or add-in lifecycle changes.

Resolve every referenced file relative to this skill folder. Do not load the sibling artifact skill or its artifact-tool instructions while this live route is active.

## 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.

## Hard Routing Rules
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