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mixed-content

Use when reviewing an HTTPS page for resources (scripts, images, stylesheets, iframes) that are loaded over plain HTTP.

60

Quality

71%

Does it follow best practices?

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Adds up to 20 points to the overall score

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SecuritybySnyk

Passed

No findings from the security scan

Fix and improve this skill with Tessl

tessl review fix ./skills/mixed-content/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.

A well-structured overview that correctly pushes implementation detail into a single one-level-deep reference. It is held back by minor internal redundancy and by deferring the executable commands, validation steps, and feedback loop to the reference without summarizing them inline.

Suggestions

Inline at least one executable check (e.g. the grep for `src="http://` / `url(http://`) and the CSP header value so the body is self-sufficient for the common case.

Add an explicit verification checkpoint in the body (confirm the response/header is enforced in a production-like environment) rather than only implying it in Code Review.

Deduplicate the upgrade-insecure-requests guidance — consolidate Quick Reference bullets 3 and 5 and avoid restating it in both Check and Fix.

DimensionReasoningScore

Conciseness

The body is mostly lean and assumes competence, but upgrade-insecure-requests is restated across Quick Reference, Check, and Fix, and bullets 3 and 5 overlap, so it could be tightened.

2 / 3

Actionability

Guidance names concrete targets (script/img/link/iframe src attributes, the CSP directive) but the executable commands and configs live in references/rule.md rather than inline, leaving the body's instructions somewhat incomplete.

2 / 3

Workflow Clarity

The Check → Fix → Explain → Code Review sequence is clear, but validation checkpoints are only implicit ("verify them against the effective production-like response") and the explicit validate-fix-retry loop is deferred to the reference.

2 / 3

Progressive Disclosure

The body is a concise overview with a single, clearly signaled one-level-deep pointer to references/rule.md (a real file), matching the well-signaled-reference anchor.

3 / 3

Total

9

/

12

Passed

Description

85%

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, concrete trigger description with an explicit "Use when" clause and a clearly bounded security niche. Its main weakness is omitting the standard "mixed content" term that practitioners most naturally use.

Suggestions

Include the canonical term "mixed content" so the description matches the wording users and developers actually say when they need this skill.

DimensionReasoningScore

Specificity

Names a concrete review action and enumerates specific resource types — "scripts, images, stylesheets, iframes" loaded over "plain HTTP" — matching the multiple-concrete-items anchor.

3 / 3

Completeness

Explicit "Use when reviewing an HTTPS page for resources ... loaded over plain HTTP" answers both what (review for HTTP resources) and when (the trigger), satisfying the both-answered anchor.

3 / 3

Trigger Term Quality

Covers natural terms like "HTTPS page", "plain HTTP", and the listed resource types, but omits the canonical term users most often say ("mixed content"), so common variation coverage is incomplete.

2 / 3

Distinctiveness Conflict Risk

The HTTPS-page-loading-HTTP-resources niche has distinct triggers and is unlikely to fire for unrelated skills, matching the clear-niche anchor.

3 / 3

Total

11

/

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

metadata_version

'metadata.version' is missing

Warning

Total

15

/

16

Passed

Repository
thedaviddias/Front-End-Checklist
Reviewed

Table of Contents

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