DOCUMENTS / Anthropic
Anthropic Spreadsheets
Keeps spreadsheet formulas editable and requires recalculation plus explicit inspection of formula-error results.
“Use this skill any time a spreadsheet file is the primary input or output. This means any task where the user wants to: open, read,”
01 / THE REASONING
Why this made the selection.
- Distinguishes formula expressions from cached calculated values, a common source of misleading workbook output.
- The inspected recalculation helper checks for vulnerable external-workbook links before rewriting the file.
02 / THE REVIEW RECORD
What we actually inspected.
Source review has boundaries.
A clear record is more useful than a “safe” badge.
Material inspected
- skills/xlsx/SKILL.md
- skills/xlsx/scripts/recalc.py
- skills/xlsx/LICENSE.txt
Our findings
- The helper creates an isolated LibreOffice profile, recalculates, saves, then reads cached cells for error values.
- It refuses a detected external-link risk unless forced and warns that its detection is not exhaustive.
- The instructions warn that saving a data_only workbook can replace formulas with values and that macro preservation needs explicit handling.
Not established by this review
- Source inspection only; no skill installation or workflow execution was performed.
The review applies to the material and revision named here. A newer upstream release can change its behavior.
03 / PUT IT TO WORK
Add a skill to your workflow.
DOCUMENTED COMMAND
/plugin install document-skills@anthropic-agent-skillsCopying does not execute this command. It may retrieve a newer version than the reviewed source.
- In Claude Code, first register the official marketplace with /plugin marketplace add anthropics/skills.
- Install the document-skills plugin under the applicable Anthropic agreement, or use the document capabilities supplied in Claude.
- This catalogue does not redistribute these restricted definitions or offer a cross-agent copying command.
Before you start
- Claude Code or an eligible Claude service
- Applicable Anthropic service access and terms
- A writable source copy and the complete spreadsheet helper package
04 / FOLLOW THE EVIDENCE
The source trail.
Our notes are separate from the original resource.
Check upstream before adopting a new version.
https://github.com/anthropics/skills/blob/34040c9c568585f6929bedeaad110ad08f079624/skills/xlsx/SKILL.md
Supports: summary, upstreamDescription, whySelected, bestFor, limitations, review, compatibility, access
https://github.com/anthropics/skills/blob/34040c9c568585f6929bedeaad110ad08f079624/skills/xlsx/scripts/recalc.py
Supports: review, limitations, access
https://github.com/anthropics/skills/blob/34040c9c568585f6929bedeaad110ad08f079624/skills/xlsx/LICENSE.txt
Supports: license
https://github.com/anthropics/skills/blob/34040c9c568585f6929bedeaad110ad08f079624/README.md
Supports: install, compatibility, access
https://github.com/vercel-labs/skills/blob/7407f3893ad4dceab546ac002c3ef806e4000c73/README.md
Supports: install