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

Quality

88%

Does it follow best practices?

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Securityby

Passed

No findings from the security scan

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

Quality

Content

77%

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

Highly actionable content with a clear, validated workflow and concrete code, but it is monolithic with no progressive disclosure and carries some redundancy across the recalculation sections.

Suggestions

Consolidate the recalc.py explanations into a single section to remove redundancy across Common Workflow, Recalculating formulas, and the Verification Checklist.

Extract the financial-model color-coding and number-formatting standards into a reference file (e.g. financial-modeling.md) and link to it from SKILL.md to improve progressive disclosure.

Tighten the WRONG/CORRECT formula comparison into a more compact do/don't table to reduce token overhead while preserving the lesson.

Dimension	Reasoning	Score
Conciseness	Mostly efficient with concrete code and no explaining of basic concepts, but recalc.py usage is repeated across three sections and the wrong/correct-formula blocks plus inline financial-model color/number standards add padding that could be tightened or split out.	2 / 3
Actionability	Provides fully executable pandas and openpyxl snippets, exact recalc commands, and precise formats (RGB values, '$#,##0', '0.0%') that are copy-paste ready.	3 / 3
Workflow Clarity	The numbered Common Workflow includes an explicit mandatory recalculation step and a validate/fix/re-recalculate feedback loop, reinforced by a Formula Verification Checklist, matching the score-3 anchor.	3 / 3
Progressive Disclosure	The ~280-line body is a single monolithic file with no bundle references, and content that could be separate (financial-modeling standards, recalc details) is inline; organization is clear but the skill exceeds the simple-skill exemption.	2 / 3
	Total	10 / 12 Passed

Description

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.

A strong, third-person description that clearly states capabilities and enumerates explicit use-when triggers with natural keywords and file extensions. It mirrors the structure of the rubric's good examples with no padding or over-claims.

Dimension	Reasoning	Score
Specificity	Lists multiple concrete actions—'creation, editing, and analysis' plus formulas, formatting, data analysis, and visualization—mirroring the score-3 anchor that enumerates specific actions rather than vague verbs.	3 / 3
Completeness	Explicitly answers both 'what' (creation/editing/analysis capabilities) and 'when' via the numbered 'When Claude needs to work with spreadsheets ... for: (1)...(5)' clause, matching the score-3 anchor with explicit triggers.	3 / 3
Trigger Term Quality	Includes natural terms users would say ('spreadsheets', 'formulas', 'formatting') and concrete file extensions ('.xlsx, .xlsm, .csv, .tsv'), giving good coverage of common variations.	3 / 3
Distinctiveness Conflict Risk	Spreadsheet-specific niche anchored by file extensions and formula/recalculation triggers makes it clearly distinguishable and unlikely to trigger for unrelated skills.	3 / 3
	Total	12 / 12 Passed

Validation

93%

Warnings & errors only

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 15 / 16 Passed

Validation for skill structure

Criteria	Description	Result
frontmatter_unknown_keys	Unknown frontmatter key(s) found; consider removing or moving to metadata	Warning

	Total	15 / 16 Passed

Repository: netease-youdao/LobsterAI
Path: SKILLs/xlsx/SKILL.md
Commit: 2921c1e

Reviewed: about 10 hours ago

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