Astro release calendar: all versions, dates and updates

Adds the astro preview --background flag to start preview servers as background processes.

Fixes concurrent static builds failing to generate i18n rewrite fallbacks for dynamic routes

Fixes a bug where an error while finalizing a request could prevent a response from being sent

Fixes duplicate CSS files being emitted in server output when a prerendered page and a server-rendered page share the same styles (e.g. a shared la...

Fixes image optimization during astro build using too many parallel processes in CPU-limited containers. Builds now respect the container's CPU lim...

Updates dependency cookie to v2. Cookie values made entirely of URL-safe characters are no longer percent-encoded in Set-Cookie headers; encoded va...

Fixes encoded request paths being routed incorrectly when using domain-based i18n

Adds a new deferRender option to the glob() content loader

Fixes the first browser visit after astro dev starts triggering an immediate full page reload

Fixes astro preview --open not opening a browser when using an adapter with a custom preview entrypoint, such as @astrojs/cloudflare

Fixes CSS module scoped-name hash mismatch in astro dev when using vite.css.transformer: 'lightningcss' with content collections. Previously, a com...

Fixes a false deprecation warning for markdown.gfm and markdown.smartypants when using the Container API

Fixes an error that could occur after the dev server restarts when using an adapter such as @astrojs/cloudflare, where a request would fail with a ...

Ensures transition directive values are HTML-escaped when rendered on hydrated islands

Fixes a bug where an error thrown inside one route's getStaticPaths() would prevent other valid routes from being matched in dev mode

Updated dependencies

Fixes astro dev incorrectly starting in background mode for Warp terminal users. Hybrid environments like Warp are no longer treated as AI agents f...

Stabilizes route caching, removing the experimental.cache and experimental.routeRules flags and replacing them with the top-level cache and routeRu...

Makes 'jsx' the default value for compressHTML

Harden the limits on the number of decoding on the URL.

Makes Sätteri the default Markdown processor

Fixes getRelativeLocaleUrl, getAbsoluteLocaleUrl, and getAbsoluteLocaleUrlList to strip trailing slashes when trailingSlash: 'never' is configured

Fixes an issue where renaming an image file while the dev server is running triggers a build error. Now Astro correctly hot-reloads the image witho...

Removes the astro db, astro login, astro logout, astro link, and astro init CLI commands.

Fixes the experimental.logger destination not being used for the "Server listening on..." startup message. The logger is now resolved before the se...

Adds background dev server management for AI coding agents.

Prevents App.match() from throwing on request paths that contain an invalid percent-sequence.

Bumps devalue dependency to v5.8.1

Fixes a plugins is not iterable crash when using a pre-6.0 @astrojs/mdx alongside integrations (e.g. Starlight) that set markdown.remarkPlugins, ma...

Adds a new preserveBuildServerDir adapter feature

Fixes 404s for dynamically imported JS chunks when using an adapter with assetQueryParams (e.g. Vercel skew protection)

Populates styles in the SSR manifest for prerendered routes. Previously, prerendered routes had styles: [] in the manifest, making it impossible fo...

Fixes request body handling in the Node adapter when req.body is a Buffer, Uint8Array, or ArrayBuffer. Previously, binary body data was incorrectly...

Fixes markdown images with empty alt text () in content collections dropping the alt attribute entirely. The alt="" attribute is now ...