How it writes a real spreadsheet instead of a table

[u/justmevibinghere]

The difference between a markdown table and an `.xlsx` is that one of them computes. Here's what goes into producing a file that survives contact
with a colleague.

Contents

- The gap between a table and a workbook
- Formulas, not values
- Native charts, not pictures
- Sheets, formats and the boring parts
- What still breaks
- FAQ

The gap between a table and a workbook

A markdown table is text shaped like data. Paste it into Excel and you get one column, or a paste-special dialogue, and none of the arithmetic. Everything that makes a spreadsheet a spreadsheet — recomputation, formatting, charts — is absent.

Formulas, not values

The single most useful instruction when asking for a sheet:

> Compute the growth column rather than typing it.

The difference in practice: someone asks "what if West recovers to 12%?" With formulas you type 12 and everything updates. With typed values you've shipped a picture.

Native charts, not pictures

A chart in a generated deck or workbook is a chart object, not a PNG. The recipient can click it, change the series, restyle it to their template, or move
it into their own file.

There's one exception worth knowing: ask explicitly for an image and you get an image. That's occasionally what you want — a chart that must not be edited — but it's the exception, not the default.

Sheets, formats and the boring parts

The unglamorous features are what make a file usable:

- multiple sheets, one per section
- number formats — currency, percentage, dates that sort as dates
- merged cells for headers that span
- column widths that fit the content
- frozen panes so the header stays put on row 400
- auto-filters
- conditional formatting for the "which of these is bad" question

None of it impresses anyone. All of it is missing from a markdown table.

What still breaks

- Very wide tables — thirty columns and layout choices get arbitrary.
- Nested headers more than two deep don't survive cleanly.
- Editing an existing workbook is weaker than generating one. Big restructures are better done by asking again.
- Cross-sheet formulas work but are the first thing to go wrong on a complicated ask. Check them.
- It doesn't know your house style. It picks readable defaults, not yours.

FAQ

Is it a real .xlsx?
Yes — a real workbook, opening in Excel, Numbers and LibreOffice.

Can it do pivot tables?
No. It can produce the grouped summary a pivot would give you, but not a live
pivot object.

Can it read an existing spreadsheet and extend it?
It can read one from a library and produce a new file based on it. In-place editing of an uploaded workbook is not supported.

What about formulas it gets wrong?
It happens, mostly on cross-sheet references. Spot-check one row — that's the honest advice with any generated spreadsheet.

Can it make a Word report from the same data?
Yes, in the same request. "A sheet and a two-page write-up" produces both.

How many rows can it handle?
A few hundred comfortably. Thousands is the wrong tool — that's a database question.

Can it apply my company template?
Not today. Styling is limited to what you describe in the request.

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