fix: respond to HEAD requests without a body

[Nic-Polumeyv]

Server.respond returns HEAD responses with a body. The HTTP layer in front of it has always discarded that body, so nothing noticed until Server.respond was called directly.

It now cancels the body and returns a bodiless copy of the response, after the dev-only error lookup keyed on the original response object. Headers, including content-length, are kept.

[pkg-svelte-dev]

Install the latest version of @sveltejs/kit from 11a48c9:

pnpm add https://pkg.svelte.dev/@sveltejs/kit/c/11a48c940e37d5bb210d490a33ff9518b4034af1

Open in pkg.svelte.dev: https://pkg.svelte.dev/repos/kit/pr/17036

[changeset-bot]

🦋 Changeset detected

Latest commit: 11a48c9

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

This PR includes changesets to release 1 package

Name	Type
@sveltejs/kit	Patch

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

[svelte-docs-bot]

Preview: https://svelte-dev-git-preview-kit-17036-svelte.vercel.app/

[coderabbitai]

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• .changeset/quiet-heads-rest.md
• packages/kit/src/runtime/server/index.js

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• sveltejs/vite-plugin-svelte (manual)
• vitejs/vite (manual)
• sveltejs/svelte (manual)

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📝 Walkthrough

Walkthrough

Server.respond now removes response bodies from direct HEAD requests by cancelling the body and returning an equivalent response with a null body. HTTP-layer handling remains unchanged. A patch Changeset entry records the fix for @sveltejs/kit.

Merge Risk: ⚪ Minimal · up to 11a48

Direct HEAD callers now receive bodyless responses while retaining response headers such as content-length. No current merge-blocking risk remains.

🚥 Pre-merge checks | ✅ 2

✅ Passed checks (2 passed)

Check name	Status	Explanation
Backward Compatibility Impact Disclosure	✅ Passed	PASS — The pull request does not introduce any listed breaking interface change. The public Server.respond(request, options): Promise<Response> declaration is unchanged. The diff removes no exports,…
Title check	✅ Passed	The title uses the required fix: prefix and accurately describes the change to return HEAD responses without a body.

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