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avif-format

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

54

Quality

61%

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/avif-format/SKILL.md
SKILL.md
Quality
Evals
Security

Quality

Content

55%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 content is well-structured and lean with good progressive disclosure to a real reference file, but it lacks executable code and concrete review steps in the body itself, leaving the workflow and actionability largely to the referenced file.

Suggestions

Include at least one copy-paste-ready <picture> markup snippet with AVIF/WebP/JPEG sources in the Fix section so the body is independently actionable.

Add a concrete validation step in the Code Review section (e.g. specific DevTools checks or a command to compare encoded vs rendered size) to raise workflow clarity.

Reduce repetition of the '50% better than JPEG' claim so it appears once rather than across the intro, Quick Reference, and Explain sections.

DimensionReasoningScore

Conciseness

The body is short and mostly efficient with brief Quick Reference bullets, though the intro line repeats the 50%-better-than-JPEG claim three times across sections, a minor redundancy that could be trimmed.

4 / 5

Actionability

Guidance is high-level ('Use picture element with WebP and JPEG fallbacks', 'Implement AVIF support with proper fallbacks') with no executable code or concrete markup in the body itself; the actual example lives only in the referenced file.

2 / 5

Workflow Clarity

The Check/Fix/Explain/Code Review sections give a rough review sequence, but there are no validation checkpoints or feedback loops (e.g. how to confirm the fix in DevTools is only mentioned, not specified), so the workflow stays implicit.

3 / 5

Progressive Disclosure

The body is a concise overview with a single clearly signaled one-level-deep reference to references/rule.md (a real file), and content is appropriately split rather than inlined.

5 / 5

Total

14

/

20

Passed

Description

67%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 specific and includes an explicit 'Use when' trigger with concrete review dimensions, but trigger-term coverage is somewhat thin and the 'when' clause largely rephrases the rule title rather than naming natural user requests.

Suggestions

Add natural user-facing trigger phrases and file extensions (e.g. '.avif', 'WebP fallback', 'picture element') to broaden trigger-term coverage.

Make the 'when' clause name concrete user scenarios (e.g. 'Use when the user mentions image format choice, AVIF/WebP, or large image payloads') rather than restating the rule title.

DimensionReasoningScore

Specificity

Lists several specific concrete actions ('reviewing image assets, markup, and CDN or build transforms' and 'Check encoded size, rendered size, loading strategy, and above-the-fold impact') but is slightly limited by reusing the rule title phrasing rather than naming a fuller action set.

4 / 5

Completeness

Has a clear 'what' (review image assets, markup, CDN/build transforms) and an explicit 'Use when...' trigger clause; the 'when' could be more specific about concrete user scenarios rather than restating the rule title.

4 / 5

Trigger Term Quality

Contains relevant terms like 'image assets', 'markup', 'CDN or build transforms', and 'AVIF', but lacks common natural user phrasings and file extensions (e.g. '.avif', 'WebP', 'picture element') that a user would actually say.

3 / 5

Distinctiveness Conflict Risk

Scoped to AVIF format review with explicit dimensions (encoded/rendered size, loading strategy, above-the-fold impact), making it mostly distinct from other image skills with only minor overlap risk.

4 / 5

Total

15

/

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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