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xlsx

Read, edit, or create Microsoft Excel `.xlsx` workbooks. Trigger this skill whenever the user mentions a spreadsheet, .xlsx file, workbook, sheet, formula, pivot table, or asks to extract tabular data, modify a sheet, or build a workbook from rows. Three execution paths: structured inspection, in-place cell edits, and create-from-scratch via openpyxl. Values starting with `=` are written as formulas; everything else is a literal value with type preserved (int / float / str / datetime).

72

Quality

90%

Does it follow best practices?

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SKILL.md
Quality
Evals
Security

Quality

Content

80%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 and well-structured with good progressive disclosure, but the in-place edit workflow lacks an explicit validation step before output, which caps workflow clarity per the destructive/batch rule.

Suggestions

Add an explicit validation step to Path B (e.g., re-open edited.xlsx with inspect_xlsx.py or verify defined_names integrity) before declaring the edit done, to satisfy the destructive/batch validation requirement.

Tighten the OOXML prose introduction ('a zip container of XML parts. Treat each cell as a typed value...') since Claude already knows the xlsx format, saving context budget.

Consider a one-line verification step in Path C (open out.xlsx and assert sheet/row counts) to give all three paths a feedback checkpoint.

DimensionReasoningScore

Conciseness

Efficient and largely assumes Claude's competence, but the prose OOXML intro ('a zip container of XML parts') and a few explanatory sentences could be trimmed slightly. Not a 5 because minor over-explanation remains.

4 / 5

Actionability

Every path gives a copy-paste-ready command line, a concrete JSON spec, and an executable openpyxl snippet covering the common cases, plus a symptom/cause/fix pitfalls table — fully executable.

5 / 5

Workflow Clarity

The decision table cleanly routes to paths A/B/C with explicit commands, but the destructive/batch edit path (B) lacks an explicit validate-then-verify checkpoint; per the rubric, missing validation in destructive or batch operations caps workflow clarity at 3.

3 / 5

Progressive Disclosure

Clear overview body with a single well-signaled one-level reference to references/openpyxl.md (verified to exist), with advanced topics appropriately offloaded rather than inlined.

5 / 5

Total

17

/

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 exemplary: concrete actions, comprehensive natural trigger terms, explicit what-and-when guidance, and a clear niche. It hits every anchor at the top of the rubric.

DimensionReasoningScore

Specificity

Lists multiple concrete actions across three explicit execution paths (structured inspection, in-place cell edits, create-from-scratch via openpyxl), with type/formula semantics specified — comprehensive coverage.

5 / 5

Completeness

Explicitly answers both what ('Read, edit, or create... three execution paths') and when ('Trigger this skill whenever the user mentions...') with concrete trigger phrases.

5 / 5

Trigger Term Quality

Comprehensive natural terms including synonyms and the file extension: 'spreadsheet, .xlsx file, workbook, sheet, formula, pivot table', plus user-intent verbs like 'extract tabular data, modify a sheet, build a workbook'.

5 / 5

Distinctiveness Conflict Risk

Scoped to .xlsx (OOXML SpreadsheetML) with a distinct trigger set; boundaries note excludes .xls/.xlsm/Google Sheets, minimizing overlap with adjacent skills.

5 / 5

Total

20

/

20

Passed

Validation

81%

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

Validation13 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

metadata_version

'metadata.version' is missing

Warning

metadata_field

'metadata' should map string keys to string values

Warning

frontmatter_unknown_keys

Unknown frontmatter key(s) found; consider removing or moving to metadata

Warning

Total

13

/

16

Passed

Repository
TokenRhythm/opensquilla
Reviewed

Table of Contents

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