Plugin
Data analyst
Explore datasets, write SQL, build visualizations and validate analyses.
◌ Claude ecosystemData & finance
Does Spreadsheets work with Claude Duet?
Not verified. Spreadsheets is a skill from Anthropic’s Claude ecosystem. We have not verified this exact package inside Duet.
The announcement says Duet carries over account skills and connected apps and can use marketplace plugins, but it does not individually validate this repository package.
The skill repository documents Claude usage. Its presence in a repository is not evidence that this exact version is active in your Duet account.
How to interpret compatibility labels →When to use it
Working with a workbook that needs to remain editable after delivery.
What the source says
This sentence is quoted word for word from the stored source snapshot. It is the evidence behind the label above.
Use this skill any time a spreadsheet file is the primary input or output.
skill-xlsx retrieved ; SHA-256 6712b39718fe…Described tasks
- open, read, edit, or fix an existing .xlsx, .xlsm, .xltx, .csv, or .tsv file
- cleaning or restructuring messy tabular data files
Sections in SKILL.md
- Recalculate (mandatory whenever the file contains formulas)
- Requirements for every output
- Financial models
Limitations to know about
- The skill is for spreadsheet files. It says not to use it when the main deliverable is a Word document, an HTML report or a Google Sheets API integration.
- The source marks recalculation as mandatory whenever the file contains formulas. A workbook that has not been recalculated can show stale cached values.
Also: Recalculate and check formulas before using a workbook for decisions. Source-available does not mean unrestricted redistribution.
When it is not the right fit
- The work is a live Google Sheets integration, which the skill’s description excludes.
- You cannot recalculate and inspect the final file before relying on its numbers.
A small task to start with
This is our suggested evaluation prompt, not a tested result or an installation command.
Review this workbook for formula errors and produce a summary of the assumptions. Do not overwrite the original.
Use non-sensitive sample data first. Compare the answer with the original inputs and record what needed correction before expanding the workflow.
Before you rely on it
- Work on a copy and ask for a separate output file.
- Ask Claude to list assumptions, missing rows and any formula it changed.
- Reconcile the final totals to a number you already trust before relying on the workbook.
Where to get started
- Read the upstream skill source, dependencies and license.
- In Claude, check Customize for the relevant skill or plugin. Follow the current official installation guide rather than guessing a Duet command.
- Verify availability in your own environment and run a small, reversible task.
Quick answers
Can I use Spreadsheets with Claude Duet?
Not verified. Spreadsheets is a skill from Anthropic’s Claude ecosystem. We have not verified this exact package inside Duet.
What is Spreadsheets good for?
Read, edit and analyze spreadsheet files, with attention to formulas and recalculation. Working with a workbook that needs to remain editable after delivery.
Where does this information come from?
Anthropic skill repository, reviewed 24 October 2026. The quoted text comes from a stored snapshot retrieved 24 October 2026.