/astro-assets

name: astro-assets
description: Use when optimizing images or other assets in Astro — <Image />, <Picture />, getImage(), Fonts API, or OG image generation.
versions:
  astro: "7"
user-invocable: true
references: references/image-component.md, references/picture-responsive.md, references/remote-images.md, references/fonts-api.md, references/og-satori.md, references/cdn-integration.md, references/templates/image-setup.md, references/templates/og-image-route.md
related-skills: astro-7, astro-seo, astro-deployment

<objective> Handles image and asset optimization in Astro 7 via the `astro:assets` module: `<Image />` and `<Picture />` components (automatic WebP/AVIF conversion, responsive `srcset`/`sizes`, required `alt`), `getImage()` for server-side generation (API routes, CSS backgrounds), remote image handling with `inferSize`, and `@astrojs/sharp` as the default processing service.

Also covers the built-in Fonts API (stable since Astro 6.0) for zero-layout-shift font loading, dynamic OG image generation with Satori at build time, and CDN integration (Cloudinary, Imgix). Does not cover general SEO meta tags (astro-seo) or deployment-specific image CDN config beyond the adapter itself (astro-deployment). </objective>

Astro Assets

Production-ready image optimization and asset management with `astro:assets` in Astro 7.

Agent Workflow (MANDATORY)

Before ANY implementation, spawn 3 agents in parallel, one `Agent` call each with a `name`:

1. **fuse-ai-pilot:explore-codebase** - Analyze existing image usage and asset patterns 2. **fuse-ai-pilot:research-expert** - Verify astro:assets API via Context7/Exa 3. **mcp__context7__query-docs** - Check Astro 7 Fonts API and image component docs

After implementation, run **fuse-ai-pilot:sniper** for validation.

---

Overview

When to Use

• Displaying optimized images with automatic WebP/AVIF conversion
• Building responsive images with multiple breakpoints
• Loading remote images from external CDNs
• Configuring custom fonts without layout shift
• Generating OG images dynamically with Satori
• Integrating Cloudinary or Imgix as image CDN

Key Modules

| Module | Exports | |--------|---------| | `astro:assets` | `<Image />`, `<Picture />`, `getImage()` | | `@astrojs/sharp` | Default image processing service | | Fonts API (stable, Astro 6.0+) | Built-in `fonts` config |

---

Core Concepts

Image Component

`<Image />` automatically optimizes local and remote images. Always provide `alt`. Use `priority` for above-the-fold images. Defaults to WebP output.

Picture Component

`<Picture />` generates `<source>` elements for multiple formats. Use `formats={['avif', 'webp']}` for best compression with fallback.

getImage()

For server-side image generation (API routes, CSS background images). Returns `{ src, attributes }` object.

Fonts API (stable, Astro 6.0+)

Built-in font optimization via the top-level `fonts` config in `astro.config.mjs` (stable since Astro 6.0 — no experimental flag). Zero layout shift, automatic preloading, supports Google Fonts and local fonts.

---

Reference Guide

Concepts

| Topic | Reference | When to Consult | |-------|-----------|-----------------| | **Image Component** | [image-component.md](references/image-component.md) | Local/remote image display | | **Responsive Images** | [picture-responsive.md](references/picture-responsive.md) | Multi-format, srcset, sizes | | **Remote Images** | [remote-images.md](references/remote-images.md) | External URLs, inferSize | | **Fonts API** | [fonts-api.md](references/fonts-api.md) | Zero-CLS font loading | | **OG with Satori** | [og-satori.md](references/og-satori.md) | Dynamic OG image generation | | **CDN Integration** | [cdn-integration.md](references/cdn-integration.md) | Cloudinary, Imgix setup |

Templates

| Template | When to Use | |----------|-------------| | [image-setup.md](references/templates/image-setup.md) | Full image optimization setup | | [og-image-route.md](references/templates/og-image-route.md) | Dynamic OG image API route |

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Best Practices

1. **Always provide `alt`** - Required for accessibility and SEO 2. **Use `priority` for LCP** - Above-the-fold images load eagerly 3. **`inferSize` for remote** - Avoids layout shift without known dimensions 4. **Fonts API over @font-face** - Built-in optimization, no manual preload 5. **Satori at build time** - Run OG generation during SSG, not SSR