feat(sv): support vite 8

[sacrosanctic]

closes #988

core packages:

• svelte
• vite-plugin-svelte

addons:

• better-auth - unaffected
• devtools-json - to be deprecated by #1045 or #1047
• drizzle - unaffected
• eslint - unaffected
• mcp - unaffected
• mdsvex - unaffected
• paraglide - likely unaffected
• playwright - unaffected
• prettier - unaffected
• storybook
• sveltekit-adapter - unaffected
• tailwindcss
• vitest

others:

• sveltejs/kit
• vite-plugin-svelte-inspector - not an installable package anymore
• enhanced-img

[changeset-bot]

🦋 Changeset detected

Latest commit: 419e2bf

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

This PR includes changesets to release 1 package

Name	Type
sv	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

[pkg-pr-new]

Open in StackBlitz

npx https://pkg.pr.new/svelte-migrate@1005

npx https://pkg.pr.new/sv@1005

npx https://pkg.pr.new/@sveltejs/sv-utils@1005

commit: 419e2bf

[svelte-docs-bot]

Preview: https://svelte-dev-git-preview-cli-1005-svelte.vercel.app/

[jycouet]

Status update on the remaining items:

devtool-json: ✅ #1045 or #1047

vitest - ✅ v4.1.1 added Vite 8 support

paraglide - ✅ Likely unaffected. No vite peer dep, relies on unplugin which is a thin passthrough for Vite plugins. One Vite 8 bug report (opral/paraglide-js#637) was closed as not-reproducible. No explicit Vite 8 declaration yet, but no blockers.

playwright - ✅ Unaffected. @playwright/test has zero Vite dependency - it's a pure E2E runner that hits the dev server, doesn't care about the bundler.

sveltekit-adapter - ✅ @sveltejs/kit@2.56.1 already supports Vite 8 ("vite": "^5.0.3 || ^6.0.0 || ^7.0.0-beta.0 || ^8.0.0"). Adapters peer-depend on kit, not vite directly.

vite-plugin-svelte-inspector - ✅ N/A for Vite 8. The inspector was absorbed into @sveltejs/vite-plugin-svelte@7.0.0 (PR sveltejs/vite-plugin-svelte#1270). No separate package needed anymore.

---

Edit: maybe we can update the main description? Was a great job already 👍

[jycouet]

LGTM 🎉