What problem does it solve? Building and maintaining polished Google Sheets by hand is slow and error-prone, especially when formulas, formatting conventions, and structural edits must stay consistent across tabs. This Skill gives an AI agent the operational rules, formula standards, and gws command recipes needed to create, inspect, edit, and audit spreadsheets reliably. ## Core Features & Use Cases - Full spreadsheet lifecycle: Create, read, update, append, clear, and structurally edit sheets via gws, including batchUpdate operations for merges, named ranges, conditional formatting, and dimension changes. - Formula discipline: Enforces auditable formula practices such as native functions, SUBTOTAL for filterable totals, named ranges for parameters, LET for readability, and a single calculation engine per metric. - Formatting conventions: Applies a documented color palette, number formats, alignment, row hierarchy, workbook architecture, and README tab layout so output matches professional spreadsheet standards. - Use Case: Ask the agent to build a financial model workbook with a Params tab, source data, scenario comparisons, and a README, then have it verify totals, formulas, and formatting after every edit. ## Quick Start Ask the agent to create a Google Sheet with a revenue model including input parameters, monthly projections, and a formatted summary tab using gws.