Clean a messy export into a board-ready report
You download the export, it comes out a mess, and you spend an hour turning it into something presentable. This removes that hour.
Reads, fixes, and builds spreadsheet files end to end — cleaning messy exports into proper, formatted workbooks with live formulas and zero formula errors.
The problem
- You download the revenue export and it arrives ugly: junk rows, dates in three formats, amounts typed as text (“R$ 1.234,56”), duplicates hiding in 220 rows.
- So you fix it by hand — delete, retype, hunt duplicates, rebuild the totals. An hour or two, every month.
How it works
You give Cowork the broken file and one sentence:
Clean this export into a board-ready revenue report — totals by plan and region — and flag anything I should look at.
And this is what comes back:
| Enterprise | R$ 338,100 |
| Pro | R$ 178,055 |
| Starter | R$ 55,370 |
| Flagged (5) | for review |
Why use it
- An hour or two back, every month — the cleanup follows rules, so it doesn't need you.
- Nothing silently guessed — the 5 odd rows went to a “Flagged for review” tab, not into your totals.
- A real Excel file, not a picture of one — the formulas work: change a number, the totals update.
- Repeatable — next month, same sentence, same clean report.
Do it yourself, step by step
Download the skill
Click here to download it — or use the Download button on its Claudinho page. A file called anthropics-skills-xlsx.skill lands in your Downloads folder.
Drag that file into Cowork
Open your Downloads folder and drag the file into the Claude desktop app window, like attaching a file to a chat. It shows up under Customize → Skills. Steps 1 and 2 are once — from now on you start at step 3.
Start a task and drop your export in
Broken as-is — no pre-cleaning, no renaming.
Type the sentence
You don't need to mention the skill: Claude sees a spreadsheet job and uses it on its own.
Clean this export into a board-ready revenue report — totals by plan and region — and flag anything I should look at.Review the spreadsheet
A real Excel file back: a Summary tab whose formulas still work — change a number and the totals update — the cleaned data behind it, and a “Flagged for review” tab with the rows it refused to fix silently.
Prefer a command? npx skills add https://github.com/anthropics/skills/tree/main/xlsx does the same.