xlsx
Comprehensive spreadsheet creation, editing, and analysis with support for formulas, formatting, data analysis, and visualization. When Claude needs to work with spreadsheets (.xlsx, .xlsm, .csv, .tsv, etc) for: (1) Creating new spreadsheets with formulas and formatting, (2) Reading or analyzing data, (3) Modify existing spreadsheets while preserving formulas, (4) Data analysis and visualization in spreadsheets, or (5) Recalculating formulas
77
88%
Does it follow best practices?
Impact
76%
1.35xAverage score across 10 eval scenarios
Passed
No known issues
Quality
Discovery
100%Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.
This is a strong skill description that clearly defines its scope around spreadsheet operations, lists concrete capabilities, and provides explicit trigger conditions with a numbered use-case list. The inclusion of multiple file extensions and specific operations like formula preservation and recalculation makes it both discoverable and distinctive. Minor grammatical inconsistency ('Modify' should be 'Modifying') but this doesn't impact functionality.
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | Lists multiple specific concrete actions: creating spreadsheets with formulas and formatting, reading/analyzing data, modifying existing spreadsheets while preserving formulas, data analysis and visualization, and recalculating formulas. | 3 / 3 |
Completeness | Clearly answers both 'what' (comprehensive spreadsheet creation, editing, analysis with formulas, formatting, visualization) and 'when' (explicit numbered list of trigger scenarios prefaced by 'When Claude needs to work with spreadsheets'). | 3 / 3 |
Trigger Term Quality | Includes strong natural keywords users would say: 'spreadsheet', '.xlsx', '.xlsm', '.csv', '.tsv', 'formulas', 'formatting', 'data analysis', 'visualization'. These cover common file extensions and task-related terms users naturally use. | 3 / 3 |
Distinctiveness Conflict Risk | Clearly scoped to spreadsheet files with specific file extensions (.xlsx, .xlsm, .csv, .tsv) and spreadsheet-specific operations like formula recalculation and preservation. Unlikely to conflict with other document or data skills. | 3 / 3 |
Total | 12 / 12 Passed |
Implementation
77%Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
This is a solid, actionable skill with excellent workflow clarity including validation feedback loops and concrete, executable code examples throughout. Its main weakness is length — the financial modeling standards and detailed formatting rules make it verbose for a single SKILL.md file, and this content would benefit from being split into referenced sub-documents. The skill effectively balances breadth of coverage with practical guidance.
Suggestions
Move the financial model requirements (color coding, number formatting, formula construction, documentation standards) into a separate FINANCIAL_MODELS.md reference file to reduce the main skill's token footprint.
Trim the 'CRITICAL: Use Formulas' section — three wrong/right pairs is excessive; one clear example pair would suffice given Claude's competence.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The skill is moderately efficient but includes some unnecessary content. The 'CRITICAL: Use Formulas, Not Hardcoded Values' section with multiple wrong/right examples is somewhat verbose, and the financial model color coding/formatting standards section is lengthy. However, most content is relevant and not explaining things Claude already knows. | 2 / 3 |
Actionability | The skill provides fully executable, copy-paste ready code examples for all major operations (creating, editing, reading Excel files), specific bash commands for recalculation, concrete formula examples, and detailed JSON output format for the recalc script. The guidance is specific and immediately usable. | 3 / 3 |
Workflow Clarity | The common workflow is clearly sequenced (choose tool → create/load → modify → save → recalculate → verify and fix errors) with an explicit validation feedback loop: recalc.py returns error details, check error_summary, fix errors, recalculate again. The Formula Verification Checklist provides additional validation checkpoints. This is especially important given that spreadsheet operations can be destructive. | 3 / 3 |
Progressive Disclosure | The content is reasonably well-structured with clear sections, but it's quite long and monolithic. The financial model requirements section (color coding, number formatting, formula construction, documentation) could be split into a separate reference file. There are no references to external files for advanced topics, and the content mixes high-level workflow with detailed standards in one document. | 2 / 3 |
Total | 10 / 12 Passed |
Validation
100%Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.
Validation — 11 / 11 Passed
Validation for skill structure
No warnings or errors.
- Repository
- majiayu000/claude-skill-registry-data
- Commit
6770aaa
- Reviewed
Table of Contents
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