• Add experimental.reportSystemEnvInlining for Turbopack: #89304
• fix: use signal-based exit codes to prevent inspector blocking exit: #89351
• Add Instant Navigation Testing API: #89465
• Support MPA navigations in instant(): #89469
• Handle Pages data route skew with deployment id header, take 2: #89325
• Include owner stack for forwarded errors if available: #89493
• [CC] Rename "unstable_prefetch" to "unstable_instant": #89448

• chore(examples): remove with-tigris example: #81843

• Update Rspack production test manifest: #89423
• Update Rspack development test manifest: #89424
• Turbopack: improve suggestions for experimental.reportSystemEnvInlining: #89486
• docs: Fix syntax in proxy example code: #89395
• Add experimental flag to expose testing API in production builds: #89499

Huge thanks to @vercel-release-bot, @mischnic, @timneutkens, @acdlite, @JamBalaya56562, @ericrav, @huozhi, and @lubieowoce for helping!

[!NOTE] This release is backporting bug fixes. It does not include all pending features/changes on canary.

• fix unlock in publish-native

This is a re-release of v15.5.11 applying the turbopack changes.

• #9539 e0063070a63751efd40cf5e5d93da3c9536e64c8 Thanks @shadcn! - use tw-merge to transform-style

• #434 by @bobsingor – Fixed memory leak where image encoder workers were never terminated when the engine was destroyed:

  • Added optional destroy() method to ImageDataConverter interface for resource cleanup
  • Updated createWorkerPoolImageConverter and createHybridImageConverter to attach destroy() that terminates the encoder worker pool
  • Updated PdfEngine.destroy() to call imageConverter.destroy?.() to clean up encoder workers

  Previously, each viewer instance would leave 2 encoder workers running after destruction.

• #434 by @bobsingor – Fixed memory leak in EmbedPdfContainer where Preact components were not unmounted on disconnect:

  • Added render(null, this.root) in disconnectedCallback() to properly unmount Preact components
  • This triggers the cleanup chain: plugin destroy, engine destroy, and worker termination

  Previously, navigating between pages would leave workers running (1 PDFium + 2 encoder workers per viewer instance).

• Updated dependencies [240c317]:
  • @astrojs/internal-helpers@0.8.0-beta.0

• #15373 14252b2 Thanks @renovate! - Updates zod to v4

• #14888 4cd3fe4 Thanks @OliverSpeir! - Updates astro add cloudflare to better setup types, by adding ./worker-configuration.d.ts to tsconfig includes and a generate-types script to package.json

• #15349 a257c4c Thanks @ascorbic! - Passes collection name to live content loaders

  Live content collection loaders now receive the collection name as part of their parameters. This is helpful for loaders that manage multiple collections or need to differentiate behavior based on the collection being accessed.

  export function storeLoader({ field, key }) {
    return {
      name: 'store-loader',
      loadCollection: async ({ filter, collection }) => {
        // ...
      },
      loadEntry: async ({ filter, collection }) => {
        // ...
      },
    };
  }

• #15394 5520f89 Thanks @florian-lefebvre! - Fixes a case where using the Fonts API with netlify dev wouldn't work because of query parameters

• #15385 9e16d63 Thanks @matthewp! - Fixes content layer loaders that use dynamic imports

  Content collection loaders can now use await import() and import.meta.glob() to dynamically import modules during build. Previously, these would fail with "Vite module runner has been closed."

• #15386 a0234a3 Thanks @OliverSpeir! - Updates astro add cloudflare to use the latest valid compatibility_date in the wrangler config, if available

• #15362 dbf71c0 Thanks @jcayzac! - Fixes inferSize being kept in the HTML attributes of the emitted <img> when that option is used with an image that is not remote.

• Updated dependencies [240c317]:

  • @astrojs/internal-helpers@0.8.0-beta.0
  • @astrojs/markdown-remark@7.0.0-beta.4

• Updated dependencies [240c317]:
  • @astrojs/internal-helpers@0.8.0-beta.0

• #15373 14252b2 Thanks @renovate! - Updates zod to v4

• #15383 876b664 Thanks @matthewp! - Fixes Preact components failing to render when using the Cloudflare adapter in dev mode.