render_xlsx

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Build an Excel (.xlsx) workbook from a sheet spec: columns with keys, row objects keyed to those columns, optional Excel number formats and a formula-aware total row (bare 'SUM' / 'AVG' / 'COUNT' / 'MIN' / 'MAX' expands into a real formula over the column's data range). Choose this over render_pdf when the recipient will sort, filter or recompute the numbers, and over render_docx when the content is tabular rather than prose. Returns a stored render { id, url, bytes, durationMs, format } where url is a signed download link valid for one hour; the workbook is a .xlsx, so feed the id to convert_document if the next step needs a PDF. Header rows are always bold on a tinted fill — there is no flag for it. Counts one render against the monthly quota. Requires a Kamy API key with the `render` scope; without a key, returns dashboard setup instructions.