Individual skill
image-optimization
Expert guidance on image optimization for web performance. Use when auditing or improving image delivery, Core Web Vitals (LCP/CLS/INP), responsive images (srcset/sizes), lazy loading, preloading, image CDN pipelines (Sirv, Cloudinary, imgix, Vercel, Cloudflare), format choice (AVIF, WebP, JPEG XL, SVG, HDR), compression and quality settings, placeholders, image alt text, or image-heavy frontend code. For Sirv URL parameters, Sirv REST API calls, Sirv Media Viewer galleries, or video, the sibling skills own the details.
plugins/IgorVaryvoda/image-optimization-skill/skills/image-optimization/SKILL.md
Source commit d780783eba4ecc7c8b9429f95c9362df95f07c61
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- Matches the observed repository HEAD
- Yes
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- Yes
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- Observed behavior
- Network or broad shell
- Last checked
- Nov 4, 2026
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Repository context
- Repository stars (not skill ratings)
- 1,531
- Repository last updated
- Nov 6, 2026
- License
- Apache-2.0
Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.
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SKILL.mdcore · 8,163 bytesSKILL.mdcore · 8,163 bytesSKILL.mdcore · 8,163 bytesSKILL.mdcore · 8,163 bytesSKILL.mdcore · 8,163 bytesagents/openai.yamlasset · 303 bytesevals/evals.jsonasset · 6,300 bytesevals/files/broken-landing.htmlasset · 1,946 bytesreferences/formats.mddoc · 15,047 bytesreferences/optimization.mddoc · 12,852 bytesreferences/performance.mddoc · 13,391 bytesreferences/responsive.mddoc · 12,629 bytesreferences/sirv-workflows.mddoc · 9,354 bytesreferences/tools.mddoc · 7,154 bytesscripts/audit-images.mjsruns · 23,289 bytes
Read excerpt
# Image Optimization Expert
## Default Workflow
1. Inspect the real surface before prescribing changes: rendered HTML, framework image components, network waterfall, build output, CDN URLs, and asset inventory.
2. Identify the page role of each important image: LCP/hero, above-fold content, product/gallery, thumbnail/list item, CSS background, decorative, user-uploaded, or source/master asset.
3. Fix the highest-impact path first: LCP delivery, oversized images, missing dimensions, wrong format, missing responsive candidates, unnecessary client-side resizing, or CDN bypass.
4. Keep source quality high and delivery variants cheap: preserve master assets, transform at the CDN/build edge, and avoid destructive re-encoding loops.
5. Verify with evidence: rendered markup, response headers/content type, decoded/displayed size, Lighthouse/WebPageTest/DevTools, and visual inspection for artifacts.
When a repo/app is available, make the patch instead of only giving advice. Prefer local framework conventions over generic snippets.
## Fast Audit Checklist
