xlsx (Anthropic Agent Skill)
Leading#1 in Skillshigh confidence
Anthropic's official spreadsheet skill (from the 163k-star anthropics/skills repo, used in production Claude) — reads, analyzes, and builds Excel with formulas, pivots, and charts; the recognized leader for AI file-based analysis.Our read
Why it ranks #1
Ships in Anthropic's official skills repository, which the existing source set records at roughly 163k GitHub stars, and is the canonical spreadsheet skill used by Claude's file workflow.Here is the catch
Requires a compatible agent runtime and spreadsheet tooling
Complex workbook fidelity still needs visual verification
Repository-level popularity does not measure adoption of this individual skill
Does this well
Official Anthropic implementation provides a strong reference workflow
Handles both analysis and production of deliverable workbooks
Plain skill instructions are inspectable and adaptable
Pricing
Checked by hand on 2026-07-23. Prices in this category change often — if this looks wrong, it probably is.
Key features
Excel workbook reading and creationFormula and pivot-table generationChart formattingSpreadsheet recalculation and validation workflow
Sources we read
Quick facts
More in this area
The rest of the Skills column.- 2K-Dense scientific-agent-skills (EDA)Automated exploratory-data-analysis and publication-quality visualization skills from the most-starred science skills library (31.6k★, 148 SKILL.md skills).
- 3nimrodfisher/data-analytics-skillsA small, focused community collection of Claude skills for the everyday analytics workflow — cleaning, aggregation, and charting on tabular data. Low star count, so ranked low.
- 4juanlurg/data-science-claude-skillsEnvironment-aware EDA skills (auto-eda, dataset-doctor) that detect your pandas/polars library and SQL dialect. Genuine but niche and low-star, so ranked low.