# Astro astro@6.3.6 — Release & Upgrade Intelligence
- **Product:** Astro (https://astro.build)
- **Version:** astro@6.3.6
- **Released:** May 20, 2026
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/astro/updates/astro-6.3.6/

## Executive Summary (TL;DR)
Astro astro@6.3.6. Source highlight: Fixes markdown images with empty alt text (`![](image.jpg)`) in content collections dropping the `alt` attribute entirely. The `alt=""` attribute is now correctly preserved in the rendered HTML output, which is important for accessibility (indicating decorative images).

## Bug Fixes
- Fixes markdown images with empty alt text (`![](image.jpg)`) in content collections dropping the `alt` attribute entirely. The `alt=""` attribute is now correctly preserved in the rendered HTML output, which is important for accessibility (indicating decorative images).
- Fixes HMR serving stale content when components are passed as props via `getStaticPaths()`
- Improved the printing of the build time if it goes over the 60 seconds.
- Fixes remote SVG sources erroring with `dangerouslyProcessSVG` after the v6.3 SVG-processing gate. The default Sharp service now resolves the output format from the source up-front when it can (URL extension, `data:` MIME, ESM metadata), and from the actual buffer at request time when it can't, so SVG sources pass through untouched without needing to set `image.dangerouslyProcessSVG: true` or an explicit `format="svg"`.
- Fixes HMR serving stale content for dynamically imported components through barrel files
- Fixes an issue where the `file()` content loader did not generate a valid JSON Schema for collections whose JSON or YAML data is a top-level array instead of an object.

## Upgrade Command
```bash
npm install --save-exact astro@6.3.6
```