[petebacondarwin]

Backports the independently useful retained remote-binding portion of #16499 to Vite plugin v1, stacked on #16539, the canonical-registry runtime backport.

Enable enhanced_error_serialization on the remote proxy Worker uploaded by the retained @cloudflare/remote-bindings package. Without this flag, remote binding errors lose machine-readable properties before reaching v1's user Worker. Miniflare 5.20261023.1-beta, supplied by #16539, already supplies the public proxy/Node error serialization changes; no dependency bump is repeated here.

Only the retained source flag and a plugin patch changeset remain. Do not restore Miniflare source or copy its error-serialization tests into v1. The existing retained remote-binding tests and plugin test suites cover session startup and integration; live remote-account error validation requires Cloudflare credentials unavailable in this environment.

Validation: Node 22.22.1 / pnpm 10.33.0; pnpm build, pnpm check, pnpm test:ci, and pnpm test:fixtures against the published parent dependencies.

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• Tests
  • Tests included/updated
  • Automated tests not possible - manual testing has been completed as follows:
  • Additional testing not necessary because: this enables the upstream-tested serialization flag in retained session configuration; existing session/plugin suites pass and no upstream dependency test is duplicated.
• Public documentation
  • Cloudflare docs PR(s):
  • Documentation not necessary because: this restores error properties through the existing remote-binding API and is described in the plugin changeset.

Note

This is a contribution from an AI agent: Codex, under the authorized v1 backport automation.

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[changeset-bot]

🦋 Changeset detected

Latest commit: 2a73b54

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@cloudflare/vite-plugin	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[petebacondarwin]

@dinasaur404 (original author) @edmundhung (human ant-core approver): please check this v1 backport of #16499 and approve it if it looks good. Only the retained remote proxy Worker's enhanced_error_serialization flag and a plugin patch changeset remain here; #16539 already supplies the published Miniflare serialization changes. No dependency upgrade is repeated and no public dependency tests/source are copied. Build/checks and existing retained test suites pass; live remote-account error validation is unavailable without credentials.

[workers-devprod]

Codeowners approval required for this PR:

• ✅ @cloudflare/wrangler

[clanky-the-clanker]

✅ Approved — A small change that is easy to follow: it enables one compatibility flag and adds a correct changeset. No issues found.

_{The decision is advisory: this comment never approves, blocks or requests changes on the pull request.}

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✅ All checks passed

📋 Code Quality: ✅ LGTM

The added enhanced_error_serialization flag in start-remote-proxy-session.ts is small and has a comment explaining it. No issues found.

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📝 Documentation: ✅ LGTM

The changeset describes the user-facing behaviour accurately and gives the Miniflare version it depends on.

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_{Reviewed commit: 2a73b541 — same changes as 5b4d991a, so this is that commit's review (no new review was run; line numbers are as of 5b4d991a)}

[workers-devprod]

Codeowners reviews satisfied

[pkg-pr-new]

npm i https://pkg.pr.new/@cloudflare/vite-plugin@16542

commit: 2a73b54