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webpagetest

Use when reviewing templates, rendered HTML, or shared components related to Analyze performance with WebPageTest. Validate the final browser-facing markup, not just the source framework abstraction.

56

Quality

65%

Does it follow best practices?

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SecuritybySnyk

Low

Low-risk findings worth noting

Fix and improve this skill with Tessl

tessl review fix ./skills/webpagetest/SKILL.md
SKILL.md
Quality
Evals
Security

Quality

Content

61%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 well-structured and token-efficient with a clean one-level reference to a real bundle file, but it reads more as a descriptive overview than an actionable guide. Adding concrete commands, example output, and an explicit validate-then-fix loop would lift actionability and workflow clarity.

Suggestions

Add a concrete example invocation or the key WebPageTest CLI/API call and a sample metrics readout so the guidance is copy-paste executable.

Sequence the Check section into explicit numbered steps with a validation checkpoint (e.g., 'Run 3+ tests; if results vary >X%, rerun before interpreting').

Replace the high-level 'Implement recommended optimizations...' in Fix with specific, named actions tied to common WebPageTest findings (compress, cache, defer third-party scripts).

DimensionReasoningScore

Conciseness

The body is lean and assumes competence, but the opening sentence and the 'Explain' section partially restate the same synthetic-vs-real-world point, leaving minor trimmable redundancy.

4 / 5

Actionability

Quick Reference gives concrete moves ('Run 3+ tests', 'Use filmstrip view', 'Check waterfall') but the Fix/Explain sections stay high-level and there are no executable commands or example outputs, leaving guidance incomplete.

3 / 5

Workflow Clarity

A rough sequence exists in Quick Reference and a Check/Fix/Explain/Code Review frame, but there are no explicit validation checkpoints or feedback loops, so the workflow has gaps.

3 / 5

Progressive Disclosure

Clear overview sections with a well-signaled one-level-deep pointer to the real 'references/rule.md'; structure is good, though the body itself is thin and only references a single file.

4 / 5

Total

14

/

20

Passed

Description

70%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 clearly states a trigger ('Use when reviewing...') and a concrete what ('Validate the final browser-facing markup'), giving it solid completeness and distinctiveness. It is slightly limited on specificity by offering only two actions and could add a couple more natural trigger synonyms.

Suggestions

Add one or two more concrete actions (e.g., 'identify render-blocking resources and slow third parties') to lift specificity toward comprehensive coverage.

Include more natural user phrasings such as 'page performance', 'Core Web Vitals', or 'loading waterfall' to broaden trigger-term coverage.

Tighten the 'when' clause to name the specific triggering contexts (e.g., 'when the user asks to audit page load performance or diagnose slow rendering') for stronger completeness.

DimensionReasoningScore

Specificity

Names the domain and two concrete actions ('reviewing templates, rendered HTML, or shared components' and 'Validate the final browser-facing markup') but the action set is not comprehensive, matching the 1-2 concrete actions anchor.

3 / 5

Completeness

Both 'what' (validate the final browser-facing markup) and 'when' (explicit 'Use when reviewing templates, rendered HTML, or shared components') are present, though the 'when' could be more specific.

4 / 5

Trigger Term Quality

Good natural keyword coverage with 'templates, rendered HTML, shared components, WebPageTest, browser-facing markup'; a few common variations a user might say are missing, fitting the above-midpoint anchor.

4 / 5

Distinctiveness Conflict Risk

The WebPageTest + rendered-HTML review niche is mostly distinct, but 'reviewing templates, rendered HTML, or shared components' has minor overlap risk with closely related HTML-review skills.

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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