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xlsx

Create/edit/analyze/verify spreadsheet workbooks including XLSX/CSV/TSV.

57

Quality

66%

Does it follow best practices?

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SecuritybySnyk

Passed

No findings from the security scan

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tessl review fix ./crates/tui/assets/skills/xlsx/SKILL.md
SKILL.md
Quality
Evals
Security

Quality

Content

57%

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

The body is appropriately concise and well-organized, but it lacks executable guidance — no library, code, or commands — and its workflow is a set of generic principles rather than a concrete, validated process. Adding specific tooling and a verification feedback loop would materially improve it.

Suggestions

Name a concrete library (e.g. openpyxl) and provide a copy-paste-ready snippet for reading/writing .xlsx files.

Turn the generic workflow into concrete steps with an explicit validation checkpoint and a fix-and-retry loop for failed verification.

Add specific, executable guidance for formulas and charts rather than abstract principles like "keep formulas auditable".

DimensionReasoningScore

Conciseness

The body is lean with no padded explanation of concepts Claude already knows; every line earns its place.

3 / 3

Actionability

The workflow offers only advisory principles ("Prefer structured tables", "Keep formulas auditable") with no library, code, or commands, describing rather than instructing.

1 / 3

Workflow Clarity

Steps are sequenced and include a verify step, but it is generic with no feedback loop for what to do when verification fails for potentially destructive edits.

2 / 3

Progressive Disclosure

Under 50 lines with no external references needed; content is organized into clear sections (When to use, Compatibility, Workflow), satisfying the simple-skill exception.

3 / 3

Total

9

/

12

Passed

Description

75%

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 concise and names concrete actions with good trigger terms, but it omits any explicit "Use when..." guidance and could overlap with generic tabular-data skills. Adding a trigger clause would lift both completeness and distinctiveness.

Suggestions

Add an explicit trigger clause, e.g. "Use when working with spreadsheet files (.xlsx/.csv/.tsv), formulas, pivot tables, or charts."

Mention common user phrasings like "Excel files" to improve trigger coverage and distinctiveness from general data skills.

Clarify the niche by noting workbook-level operations (formulas, charts, sheets) versus plain CSV/TSV text handling.

DimensionReasoningScore

Specificity

"Create/edit/analyze/verify spreadsheet workbooks" lists four concrete third-person actions, matching the anchor for multiple specific concrete actions.

3 / 3

Completeness

The description clearly states what the skill does but lacks a "Use when..." clause or equivalent explicit trigger guidance, so completeness is capped at 2.

2 / 3

Trigger Term Quality

"spreadsheets", "workbooks", "XLSX", "CSV", and "TSV" are natural terms users would say when needing this skill, giving good coverage.

3 / 3

Distinctiveness Conflict Risk

The spreadsheet/workbook niche is somewhat specific, but CSV/TSV are generic tabular formats that overlap with data-analysis skills and no explicit triggers are given to disambiguate.

2 / 3

Total

10

/

12

Passed

Validation

93%

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

Validation15 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

frontmatter_unknown_keys

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

Warning

Total

15

/

16

Passed

Repository
Hmbown/CodeWhale
Reviewed

Table of Contents

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