Vite 8 support

This release adds Vite 8 support to RedwoodSDK.

The SDK plugin layer now works with Vite 8's Rolldown-based build and dependency optimizer pipeline. Vite 8 is the default path in the SDK test apps going forward.

This is not intended to force every app to upgrade Vite on the same day. [email protected] still accepts Vite ^6.2.6, 7.x, and 8.x, so existing Vite 6/7 apps can update RedwoodSDK first and move to Vite 8 when ready.

Upgrade notes

For apps moving to Vite 8:

pnpm add [email protected]
pnpm add -D vite@latest

If your app uses @vitejs/plugin-react, upgrade that package too:

pnpm add -D @vitejs/plugin-react@latest

If your Vite config passes Babel plugins through react({ babel: ... }), move that config to @rolldown/plugin-babel. @vitejs/plugin-react v6 no longer accepts the babel option.

Before:

react({
  babel: {
    plugins: ['babel-plugin-react-compiler'],
  },
})

After:

import babel from '@rolldown/plugin-babel'
import react, { reactCompilerPreset } from '@vitejs/plugin-react'

export default defineConfig({
  plugins: [
    react(),
    babel({ presets: [reactCompilerPreset()] }),
    // redwood(), cloudflare(), etc.
  ],
})

If you do not use React Compiler or custom Babel options, react() is enough.

Also check any other Vite plugins in your app for Vite 8-compatible versions.

Compatibility notes

• Vite 8 is the recommended path for new upgrade work.
• Vite 6/7 compatibility remains available in this release so apps can migrate incrementally.
• The Vite 7 path has focused SDK smoke and playground coverage. The Vite 8 path has the full default SDK coverage.

Full Changelog: https://github.com/redwoodjs/sdk/compare/v1.4.1...v1.5.0