What problem does it solve? Editing a workbook that is already open in Microsoft Excel normally requires manual clicking or switching to a separate file-authoring workflow. This Skill connects to the live Excel desktop session through the ChatGPT add-in for Excel, so you can read, write, format, chart, and verify the exact workbook on your screen without exporting or re-uploading files. ## Core Features & Use Cases - Guided live-session setup: Walks through an ordered checklist (Excel open, target workbook identified, ChatGPT add-in installed and signed in, connected-document tools available, workbook registered) with exact user-facing guidance when any gate fails. - Live workbook operations: Reads ranges, searches workbooks, writes and clears ranges, formats cells, and creates charts, tables, and PivotTables through the connected session's advertised tools, with an Office.js fallback for batch or API-only operations. - Verification and quality control: Inspects formulas and values after writes, renders ranges as images to catch clipped labels or blank charts, and applies domain guidance for finance, FP&A, healthcare, marketing, and scientific workbooks. - Use Case: You have a financial model open in Excel and ask to add a variance column and a trend chart. The Skill verifies the live session, writes formula-driven columns matching existing formatting, creates the chart, and visually confirms the result in the open workbook. ## Quick Start Tag the Microsoft Excel app and ask to update the open workbook, for example: add a totals row and a bar chart to the active sheet in my open Excel workbook.
