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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

1.35x
Quality

87%

Does it follow best practices?

Impact

76%

1.35x

Average score across 10 eval scenarios

SecuritybySnyk

Passed

No findings from the security scan

The canonical home for this skill is xlsx in anthropics/skills

SKILL.md
Quality
Evals
Security

Quality

Content

75%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

The body is highly actionable with executable code and a clear validation feedback loop, but is somewhat verbose and inlines material that would benefit from separate reference files. Without any bundle files, progressive disclosure is only moderately organized.

Suggestions

Trim general-knowledge explanations (formula construction basics, off-by-one reminders, 'Common Pitfalls') that Claude already knows to improve conciseness.

Move detailed color-coding and number-formatting standards into a references/ file (e.g. FORMATTING.md) and link from the body to improve progressive disclosure.

Optionally extract the formula verification checklist into a separate reference file to keep SKILL.md as a lean overview.

DimensionReasoningScore

Conciseness

Content is mostly efficient with executable snippets, but includes padded material like formula-construction lessons, off-by-one explanations, and 'Common Pitfalls' lists that teach general Excel knowledge Claude already has.

3 / 5

Actionability

Provides copy-paste ready pandas and openpyxl snippets, concrete recalc.py commands, and a JSON output schema for interpreting results, covering the common cases.

5 / 5

Workflow Clarity

The Common Workflow lists an explicit 6-step sequence with a mandatory recalculation step and a verify/fix feedback loop ('Fix the identified errors and recalculate again'), plus a Formula Verification Checklist.

5 / 5

Progressive Disclosure

There is no bundle structure (references/scripts/assets absent), so all guidance is inlined in SKILL.md; section headers exist but material like full formatting standards and checklists could live in separate reference files.

3 / 5

Total

16

/

20

Passed

Description

100%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

The description is comprehensive and well-structured, clearly stating capabilities and an explicit enumerated 'when' trigger with natural keywords and file extensions. It is a strong, specific description with minimal conflict risk.

DimensionReasoningScore

Specificity

Lists multiple concrete actions (creating, reading/analyzing, modifying, data analysis/visualization, recalculating) across enumerated capabilities, giving comprehensive coverage.

5 / 5

Completeness

Clearly states what it does ('Comprehensive spreadsheet creation, editing, and analysis...') and an explicit 'when' trigger with enumerated use cases, satisfying both what and when.

5 / 5

Trigger Term Quality

Natural terms 'spreadsheets', plus file extensions (.xlsx, .xlsm, .csv, .tsv) and synonyms are all present and would be said by users.

5 / 5

Distinctiveness Conflict Risk

Niche is clearly scoped to spreadsheet formats and tasks with file-extension triggers, minimizing overlap with unrelated skills.

5 / 5

Total

20

/

20

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.

Validation16 / 16 Passed

Validation for skill structure

No warnings or errors.

Repository
majiayu000/claude-skill-registry
Reviewed

Table of Contents

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