Sheet Generation API: Structured JSON In, Formatted Spreadsheet Out

Spreadsheet Generation Is Still Painful Every application eventually needs to export data as a spreadsheet. Financial reports, inventory lists, invoices, analytics dashboards — at some point, someone asks for an Excel file and you start searching for libraries. If you work in JavaScript, you find ExcelJS or SheetJS. Python has openpyxl. Ruby has caxlsx. Java has Apache POI. Each one has a different API surface, different quirks, and different failure modes. The common thread: they're all verbose