# Astro astro@5.15.6 — Release & Upgrade Intelligence
- **Product:** Astro (https://astro.build)
- **Version:** astro@5.15.6
- **Released:** Nov 13, 2025
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/astro/updates/astro-5.15.6/

## Executive Summary (TL;DR)
Astro astro@5.15.6. Source highlight: Fixes hydration of client components when running the dev server and using a barrel file that re-exports both Astro and UI framework components.

## Bug Fixes
- Fixes hydration of client components when running the dev server and using a barrel file that re-exports both Astro and UI framework components.
- Updates the experimental Fonts API to log a warning if families with a conflicting `cssVariable` are provided
- Fixes an error when using `transition:persist` with components that use declarative Shadow DOM. Astro now avoids re-attaching a shadow root if one already exists, preventing `"Unable to re-attach to existing ShadowDOM"` navigation errors.
- Updates the experimental Fonts API to allow for more granular configuration of remote font families

## Upgrade Command
```bash
npm install --save-exact astro@5.15.6
```