Excel spreadsheet builder
Builds and edits .xlsx workbooks with live formulas, formatting, dropdowns and named ranges
- Repository
- spinabot/brigade
- Stars
- 11,367
- Licence
- MIT
- Files
- 1 file
What it does
Once installed, the agent can create or change Excel workbooks for you, including tables, multi-sheet files and simple financial models. It is instructed to write real Excel formulas instead of pasting computed numbers, so the spreadsheet stays live when inputs change, and to add formatting, dropdown lists, conditional formatting and named ranges. It can also make surgical edits to a workbook you already have, matching its existing layout.
Great for
- Analysts or finance staff who need a quick model with live formulas and standard banker-style colour conventions
- Anyone who wants a formatted data table or multi-sheet workbook generated from a description
- People editing an existing spreadsheet who want changes made without disturbing other sheets
Skip it if
- Workbooks where formula errors would cause real harm, since the skill does not evaluate formulas unless LibreOffice happens to be installed, so errors may only show when the file is opened
- Users who expect a guaranteed-correct financial model without reviewing it, because the skill itself warns that formulas are stored but not computed
Try asking
- “Make a 3-year revenue model with a growth-rate input cell and formulas that reference it”
- “Create an expense tracker workbook with a dropdown for category and currency-formatted totals”
- “Add a row of Q3 figures to the sales table in my existing workbook without changing the other sheets”
- “Build a multi-sheet budget with frozen header rows and conditional formatting for negative values”
Install in 3 steps
- 1
Download the skill
The ZIP contains the 1 original files, the MIT licence and an attribution note.
xlsx.zip - 2
Add it to your agent
Claude Code (all projects)
mkdir -p ~/.claude/skills && unzip xlsx.zip -d ~/.claude/skills/Claude Code / Agent SDK (this project only)
mkdir -p .claude/skills && unzip xlsx.zip -d .claude/skills/Claude apps (web/desktop): Settings → Capabilities → Skills → Upload skill, and choose the ZIP.
- 3
Ask for the task
No special command needed — the agent reads the skill's description and loads it when your request matches. Try one of the prompts above.
Get better results
- Describe the inputs and assumptions up front so the agent can place them in their own labelled cells and reference them with formulas
- When editing an existing workbook, tell the agent to follow its current column order, units and formats
- Install LibreOffice if you want the agent to recalculate and check for #REF! or #DIV/0! errors before delivery
What's inside
- SKILL.md
Redistributed unmodified from spinabot/brigade under the MIT licence. The assessment was drafted with AI from the skill's files on 2026-10-29. Skills can instruct your agent to run code — read SKILL.md and any scripts before installing.