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sirv-dynamic-imaging

Sirv dynamic imaging URL API for on-the-fly image transformation. Use when building image URLs with Sirv CDN, resizing images via URL parameters, adding watermarks/text overlays, cropping, applying filters, format conversion (WebP, AVIF), or any Sirv URL-based image manipulation. Covers 100+ URL parameters for scaling, cropping, effects, text, watermarks, frames, and optimization.

75

Quality

94%

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SecuritybySnyk

Passed

No findings from the security scan

SKILL.md
Quality
Evals
Security

Quality

Content

92%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.

A lean, highly actionable reference: Sirv-specific parameter tables and copy-paste URL/HTML examples, a workflow with explicit verification steps, and well-signaled one-level-deep references. The only cost is slight duplication between the inline tables/examples and the reference files.

DimensionReasoningScore

Conciseness

Efficient and Sirv-specific throughout with no explanations of known concepts, but each Quick Reference section pairs a parameter table with an example block repeating the same parameters, and the body's sizing/effects tables partially duplicate the reference files — minor trimming opportunities.

4 / 5

Actionability

Fully executable guidance: copy-paste-ready URL snippets ('?w=800&scale.option=fit', '?cw=500&ch=300&cx=100&cy=50', '?watermark=/logo.png&watermark.opacity=50'), complete <img srcset> and <picture> HTML patterns, and concrete verification commands ('curl -I') covering the common cases.

5 / 5

Workflow Clarity

The Workflow section sequences five steps with checkpoints ('Preserve existing query params', 'Add or update assertions for final URL shape when the transform is business-critical'), and the dedicated Verification section supplies explicit validation (content-type/length/cache headers, rendered dimensions vs DPR, visual crop comparison).

5 / 5

Progressive Disclosure

Clear overview with a 'When to Read Reference Files' section explicitly signaling four topical, one-level-deep references (sizing.md, effects.md, overlays.md, profiles.md — all verified present), with quick-reference values inline and detail appropriately delegated.

5 / 5

Total

19

/

20

Passed

Description

92%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.

Strong description: concrete, third-person, with an explicit 'Use when' trigger clause covering the main use cases and vendor-specific terms that prevent mis-triggering. Only minor gap is a couple of missing natural synonyms like 'compress' or 'responsive images'.

Suggestions

Add natural trigger synonyms such as 'compressing/optimizing images' and 'responsive images or srcset' to the 'Use when' clause, since those are common user phrasings the skill body already supports.

DimensionReasoningScore

Specificity

Names the domain ('Sirv dynamic imaging URL API for on-the-fly image transformation') and lists multiple concrete actions — 'building image URLs with Sirv CDN', 'resizing images via URL parameters', 'adding watermarks/text overlays', 'cropping', 'applying filters, format conversion (WebP, AVIF)' — with comprehensive coverage stated across 'scaling, cropping, effects, text, watermarks, frames, and optimization'.

5 / 5

Completeness

Clearly answers both what (first and third sentences: 'on-the-fly image transformation', 'Covers 100+ URL parameters...') and when, with an explicit 'Use when building image URLs with Sirv CDN, resizing images via URL parameters...' clause enumerating concrete triggers.

5 / 5

Trigger Term Quality

Good natural-term coverage ('resizing images', 'watermarks/text overlays', 'cropping', 'applying filters', 'WebP, AVIF') but a few phrases users would naturally say are missing, e.g. 'compress/optimize images' and 'responsive images/srcset' which the skill body explicitly supports.

4 / 5

Distinctiveness Conflict Risk

Clear niche with distinct triggers: 'Sirv CDN', 'Sirv URL-based image manipulation' are vendor-specific, so overlap risk with other image skills is minimal.

5 / 5

Total

19

/

20

Passed

Validation

100%

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

Validation — 16 / 16 Passed

Validation for skill structure

No warnings or errors.

Repository

IgorVaryvoda/image-optimization-skill

Path

skills/sirv-dynamic-imaging/SKILL.md

Reviewed

Table of Contents

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