git:20260512.df85811 to git:20260729.3b91eed

5 added, 1 removed. Audit A to A.

---

name: seo-images

- description: Use when optimizing images for SEO. Covers alt text, descriptive filenames, modern formats (WebP/AVIF), lazy loading, responsive sizing (srcset), ImageObject schema.

+ description: Use when optimizing images for SEO — alt text, filenames, formats, lazy loading, responsive sizing.

user-invocable: false

related-skills: seo, seo-schema, seo-technical

---

+ <objective>

+ Checks image SEO fundamentals: descriptive `alt` text (empty only for decorative images), kebab-case descriptive filenames, modern formats (WebP/AVIF with JPG/PNG fallback), `loading="lazy"` on below-fold images, responsive `srcset`/`sizes`, explicit `width`/`height` to prevent CLS, ImageObject schema, and file-size/quality targets per image role (hero/content/thumbnail).

+ </objective>

# Image SEO

## Checks

- All `<img>` have descriptive `alt` (empty `alt=""` only for decorative)

- Filenames: kebab-case, descriptive (`red-running-shoes.webp` not `IMG_1234.jpg`)

- Formats: WebP/AVIF with JPG/PNG fallback

- Lazy loading: `loading="lazy"` on below-fold images

- Responsive: `srcset` + `sizes` for different viewports

- Dimensions: `width` + `height` set to prevent CLS

## File Optimization Targets

|------|--------|----------|---------|

| Hero | AVIF/WebP | 200 KB | 75-80 |

| Content | WebP | 100 KB | 75 |

| Thumbnail | WebP | 30 KB | 70 |

## References

- `skills/seo/02-onpage-seo/alt-text-images.md`