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webp-format

Use when reviewing image assets, markup, and CDN or build transforms related to Use WebP format with fallbacks. Check encoded size, rendered size, loading strategy, and above-the-fold impact together.

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 ./skills/webp-format/SKILL.md
SKILL.md
Quality
Evals
Security

Quality

Content

50%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.

Well-structured overview with excellent progressive disclosure to a single reference file, but the body is overly vague on executable steps and repeats known concepts. Inlining a minimal code snippet and removing redundant stats would lift actionability and conciseness.

Suggestions

Inline one minimal executable snippet (e.g. a <picture> element with WebP source and JPEG fallback) so the body is actionable without forcing a reference hop.

Remove the redundant 25-35% compression restatement from the intro, Quick Reference, and Explain sections; state it once.

Add an explicit verification checkpoint to the workflow (e.g. 'Confirm WebP is served via the Network tab and fallback renders in Safari < 14') to close the validation gap.

DimensionReasoningScore

Conciseness

Mostly efficient and short, but it explains a concept Claude already knows ('WebP is smaller than JPEG and PNG at similar quality') and repeats the 25-35% compression stat across the intro, Quick Reference, and Explain sections.

3 / 5

Actionability

The body itself offers only high-level hints ('Convert images to WebP format and implement proper fallback strategies') with no executable code or commands; all concrete, copy-paste-ready guidance lives in references/rule.md rather than inline.

2 / 5

Workflow Clarity

The Check/Fix/Explain/Code Review sections give a rough sequence and the Code Review section hints at DevTools confirmation, but there are no explicit validation checkpoints or feedback loops for verifying the fix.

3 / 5

Progressive Disclosure

The body is a lean overview that clearly signals a single one-level-deep reference ('see references/rule.md') for full implementation details, code examples, and framework-specific guidance; the bundle confirms rule.md is real and holds the detail.

5 / 5

Total

13

/

20

Passed

Description

83%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.

A strong, third-person description that concretely states both capability and trigger conditions with a clear niche. It could be tightened by adding file extensions and synonyms to improve trigger-term coverage.

DimensionReasoningScore

Specificity

Names the domain (image assets, markup, CDN/build transforms) and several concrete checks ('encoded size, rendered size, loading strategy, and above-the-fold impact'), but stops short of fully comprehensive coverage of actions like converting or serving headers.

4 / 5

Completeness

Explicitly answers both 'what' ('Check encoded size, rendered size, loading strategy, and above-the-fold impact together') and 'when' ('Use when reviewing image assets, markup, and CDN or build transforms related to Use WebP format with fallbacks') with concrete trigger phrases.

5 / 5

Trigger Term Quality

Includes natural terms users would say ('image assets', 'markup', 'CDN or build transforms', 'WebP format'), but omits synonyms and file extensions like '.webp', 'modern image formats', or 'AVIF'.

4 / 5

Distinctiveness Conflict Risk

The WebP-with-fallbacks niche is clearly distinct with specific triggers, but broad 'image assets' framing carries minor overlap risk with related image-format skills (e.g. AVIF, lazy-loading).

4 / 5

Total

17

/

20

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

metadata_version

'metadata.version' is missing

Warning

Total

15

/

16

Passed

Repository
thedaviddias/Front-End-Checklist
Reviewed

Table of Contents

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