🐞 Patch Changes

• #17651 504333c Thanks @sxzz! - Refactors internal version handling to use a smaller, ESM-native dependency

• #17942 0bc5715 Thanks @matthewp! - Returns appropriate 400 and 404 responses from the image endpoint for invalid and missing local image paths

• #17700 b2222fc Thanks @winklemad! - Fixes Astro.preferredLocaleList returning an empty list when a locale is configured with the object form ({ path, codes }) and the browser sends the code with different casing or an underscore, such as en-US matching a configured en-us

• #17941 394ff79 Thanks @matthewp! - Fixes astro preview --ignore-lock (and astro dev --ignore-lock) being refused when run from an AI agent environment. The flag now starts the server in the foreground instead of erroring, since agent detection only inferred background mode and was never explicitly requested. An explicit --background combined with --ignore-lock still errors.

• #17928 3277927 Thanks @ArmandPhilippot! - Fixes TypeScript autocompletion for getImage() to suggest all available predefined options.

• #17928 3277927 Thanks @ArmandPhilippot! - Fixes a type error in getImage() options that allowed passing both widths and densities at the same time.

• #17857 2637ed1 Thanks @Princesseuh! - Improves rendering performance

• #17943 2fc7ce9 Thanks @matthewp! - Fixes a WebAssembly error when importing astro:actions in tests that run under @cloudflare/vitest-pool-workers

• #18018 1b5a234 Thanks @astro-factory! - Fixes trailing-slash redirect response body pointing to the incoming URL instead of the redirect target. The location header was correct, but the HTML body (<meta http-equiv="refresh">, <title>, and <a> tag) contained the original request path without the trailing-slash correction or query string.

• #17905 eaf70fa Thanks @SudoDevStudio! - Fixes custom dev toolbar apps losing their UI after client-side navigation with <ClientRouter />.

• #18011 558b301 Thanks @astro-factory! - Fixes prerendered Cloudflare pages rendering as [object Object] when nodejs_compat is enabled in wrangler.toml

• #17944 ba08e35 Thanks @matthewp! - Fixes a regression in astro dev where writes outside the module graph (for example, @astrojs/cloudflare’s .wrangler/state files) invalidated the middleware on every request, causing repeated SSR reloads. Such writes no longer invalidate the middleware.

• #17531 ae837db Thanks @danilloestrela! - Updates svgo to 4.0.2 to resolve a security advisory

• #17953 dbbf10e Thanks @astro-factory! - Fixes a one-time page reload shortly after the first load on cold dev-server starts when a project has framework components imported from MDX content entries. MDX files are now included in the dev dependency pre-bundling scan, so their framework dependencies are bundled up front instead of being discovered (and reloaded for) at runtime.

• #17955 4e8ad9a Thanks @matthewp! - Improves dev server startup time. The content config and dev server app module graphs now begin compiling during server creation without blocking the server from listening. Request handling waits for the shared setup result when needed, cutting astro dev ready time by roughly a third on projects with a content config.

• #17960 9838049 Thanks @Chy-Zaber-Bin-Zahid! - Improves the diagnostics of some Astro errors.

• #17998 0e5478d Thanks @astro-factory! - Fixes SVG <style> elements nested inside <defs> or other container elements not being hashed for CSP

• #17994 80f9f1d Thanks @astro-factory! - Fixes experimental.incrementalBuild restoring pages with stale CSS after a preprocessor partial changes or missing original images referenced by restored pages

• #17889 8ae6b46 Thanks @ajfAfg! - Fixes a bug where the dev server stripped the configured base from URLs that only share a prefix with it. With base: '/s', requests to /src/... were rewritten to /rc/... and failed, breaking those pages during development.

• #17980 cfccafa Thanks @gameroman! - Improves JSDoc for fonts api

• #17953 dbbf10e Thanks @astro-factory! - Fixes CSS HMR for framework components rendered through content entries after ClientRouter navigation

• #17970 0b4dc3a Thanks @matthewp! - Improves serialization of transition animation values in generated CSS

• #17999 30ef3cb Thanks @astro-factory! - Fixes content collection HMR not updating prerendered pages when an adapter enables a separate prerender environment (e.g. @astrojs/cloudflare with prerenderEnvironment: 'node')

• #18002 312ab49 Thanks @shoutoutuoadi325! - Fixes redirect targets being corrupted when a dynamic route parameter value contains $ replacement patterns like $&

• #17937 e294953 Thanks @matthewp! - Fixes a bug where the glob() content loader kept stale entries in the data store after the last file in a collection was deleted. Empty collections are now pruned correctly, and the file watcher is registered in dev so the first file added to an empty collection is picked up without a restart.

• #17945 750b4db Thanks @matthewp! - Pre-bundles renderer server entrypoints and the default console logger during dev so they are included in the initial optimization pass, preventing a mid-request re-optimization that could crash the dev server on Cloudflare (workerd).