Individual skill
spreadsheet-ops
Use when working a spreadsheet programmatically — writing or repairing a formula, generating an .xlsx with Python including charts and conditional formats, driving Google Sheets from a script, building a read-transform-write pipeline, or writing an in-sheet macro or trigger. Covers formula errors, Sheets API quota, service-account permissions, and formulas that read back blank. NOT pure dedupe or normalisation with no sheet output (that is `data-cleaning`), NOT scraping a web table into rows (that is `data-scraper`), NOT multi-app event wiring (that is `automation-flows`).
skills/spreadsheet-ops/SKILL.md
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- Last checked
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- Nov 4, 2026
- License
- MIT
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- spreadsheet Declared skill tag
- excel Declared skill tag
- google-sheets Declared skill tag
- openpyxl Declared skill tag
- gspread Declared skill tag
- apps-script Declared skill tag
- formulas Declared skill tag
- automation Declared skill tag
- writing Derived category
- data Derived category
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SKILL.mdcore · 11,805 bytesSKILL.mdcore · 11,805 bytesSKILL.mdcore · 11,805 bytesSKILL.mdcore · 11,805 bytesSKILL.mdcore · 11,805 bytesSKILL.mdcore · 11,805 bytesevals/README.mddoc · 2,158 bytesevals/cases.yamlasset · 3,685 bytesreferences/formula-cookbook.mddoc · 2,760 bytesreferences/python-excel.mddoc · 3,864 bytesreferences/sheets-api-appsscript.mddoc · 4,270 bytesscripts/verify.shruns · 5,125 bytes
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# spreadsheet-ops — the spreadsheet as a programmable surface
A spreadsheet is a runtime, not a document. Your job is to emit a **checkable artifact** — a `.xlsx`
file that opens, a script that compiles, a cell range you can re-read — never a hand-waved formula in
prose. Pick the tool that matches the runtime (local file vs cloud sheet, one-shot vs event-driven),
write the formula with comma arguments, and verify before you claim it works.
The trap that bites everyone first: **openpyxl writes formulas but does not compute them.** The string
is stored; Excel evaluates it on open. If you read the cell back with Python it is `None` until a real
Excel/LibreOffice session has saved it. Internalize that before you touch a workbook.
## Pick the tool first (this branches, so decide before coding)
| Your situation | Reach for | Why |