cloudflare/workers-sdk @cloudflare/vite-plugin@1.66.0

on GitHub

Minor Changes

• #16539 046db08 Thanks @petebacondarwin! - Update the development registry to use the canonical Cloudflare path

  Upgrade Miniflare to 5.20261023.1-beta and Wrangler to 4.154.0. Vite plugin v1 now uses CLOUDFLARE_DEV_REGISTRY_PATH or <Cloudflare config directory>/dev-registry/v5 for Worker discovery. MINIFLARE_REGISTRY_PATH is no longer read. When mixing Vite and Wrangler development sessions, set the same CLOUDFLARE_DEV_REGISTRY_PATH for both because Wrangler retains its legacy default.

• #16407 9ec1101 Thanks @petebacondarwin! - Support remote Hyperdrive bindings in Vite plugin v1 development and preview

  Set remote: true on a Hyperdrive binding in wrangler.jsonc to connect to its deployed configuration without a local database connection string. The retained remote proxy exposes the binding's connection string and socket streams, and remote session cleanup preserves startup errors and shares one disposal attempt.

Patch Changes

• #16542 ef573d4 Thanks @petebacondarwin! - Preserve machine-readable error properties from remote bindings

  Enable enhanced error serialization on the remote proxy Worker used by Vite plugin v1. Combined with Miniflare 5.20261023.1-beta, remote binding errors retain properties such as code and numericCode so Worker code can handle them without parsing error messages.

• #16480 ccaa34a Thanks @petebacondarwin! - Prevent malformed token-exchange responses from crashing remote binding startup

  Update the Undici dependency bundled from the retained remote-bindings package to 7.30.1. Responses with excessive content encodings now reject without a later unhandled stream error when the server closes the connection early.

• #16502 6f2eda1 Thanks @petebacondarwin! - Update the retained asset configuration validator to Zod 4.6.6

  The Vite plugin validates _headers and _redirects through its private workers-shared package. Update that bundled copy to address excessive memory consumption when validating oversized collections.

• #16444 79678c4 Thanks @petebacondarwin! - Update Vite plugin v1 to the October 23 Workers runtime

  Use Miniflare 5.20261023.0-beta and the matching Wrangler release for local development and preview. Align bundled helpers and Workers types with this runtime, and use 2026-10-23 as the fallback compatibility date when none is configured. The runtime and helper updates also prevent malformed HTTP responses with excessive content encodings from causing unhandled stream errors. The published helpers also update their bundled Zod validator and fix Windows keyring setup for remote-binding credentials when the configuration path contains spaces.

• #16479 1d5354b Thanks @petebacondarwin! - Treat cloudflare:durable-objects as a built-in runtime module

  Workers can import retryable() from cloudflare:durable-objects to mark Durable Object methods as safe to retry. The plugin now leaves that import for the runtime to resolve, as it does for cloudflare:workers, instead of trying to resolve it as a package.

• #16493 4ce6176 Thanks @petebacondarwin! - Preserve a Worker response's statusText in Vite dev and preview

  Responses such as new Response(body, { status: 231, statusText: "Custom" }) now reach the browser as 231 Custom instead of 231 unknown. Empty status text is also preserved over HTTP/1.x.

• #16501 109844e Thanks @petebacondarwin! - Preserve separate Set-Cookie request headers in Vite dev and preview

  Workers now receive each incoming Set-Cookie value separately for HTTP requests and WebSocket upgrades, including values with commas in an Expires date. Previously, multiple values could be combined into one header.

• #16503 ca116f9 Thanks @petebacondarwin! - Fix a dev server failing to start when an earlier dev server in the same process had different Worker exports

  The Vite plugin now clears the Worker export types it detected when a dev server closes. A dev server created afterwards in the same process derives them from its own config again, so it no longer fails with Class extends value undefined for a Durable Object the earlier server's Worker did not export.

• #16504 436fa9a Thanks @petebacondarwin! - Fix Vite DevTools WebSocket connections closing unexpectedly

  Leave upgrades at /__devtools/__ws to Vite DevTools instead of forwarding them to the Worker. Sandbox preview requests continue to reach the Worker.