chore: migrate from Vite v7 to v8 (Rolldown/Oxc) (#919)

## Summary

Vite 8 replaces Rollup+esbuild with Rolldown+Oxc as its bundler and
transformer. This PR adapts the codebase to all relevant breaking
changes.

### Config changes (all packages)
- Rename `build.rollupOptions` → `build.rolldownOptions` in every
`vite.config.ts` and `vitest.config.ts`
- Remove the `_commonjsHelpers` chunk-name special-case — Rolldown
handles CJS natively and this chunk no longer appears
- Update `vite-plugin-static-copy` targets with `rename: { stripBase:
true }` to match v4's new directory-structure-preserving behaviour
- Replace `vite-tsconfig-paths` plugin with the native
`resolve.tsconfigPaths: true` option (Vite 8 built-in)
- Replace deprecated `customResolver` alias with a `resolveId` plugin
hook for the `@metamask/kernel-shims/endoify` redirect
- Update `js-trusted-prelude.ts` plugin to read
`config.build.rolldownOptions?.input`

### `bundle-vat.ts` (kernel-utils)
- Use `RolldownOutput` / `OutputChunk` types from `rolldown` instead of
`Rollup.*` from `vite`
- Replace `output.inlineDynamicImports: true` (Rollup-only) with
`output.codeSplitting: false`
- Add `removeDynamicImportsPlugin`: Rolldown rejects IIFE format
whenever the bundle graph contains any `import()` expression, even with
`codeSplitting: false`. Some third-party packages (viem, `@endo/*`) use
lazy `await import(x)` for utilities that vats never call; the plugin
replaces all string-literal dynamic imports with `Promise.resolve({})`
to satisfy Rolldown's constraint
- Add a module-level promise-queue mutex to serialize concurrent
`bundleVat()` calls — Rolldown has global state that is corrupted when
multiple IIFE builds run concurrently via `Promise.all` (as `kernel-cli`
does when bundling a directory of vats)
- Add `rolldown` as a peer dependency and update the `vite` peer dep
range to `^8.0.6`

### `bundle-loader.ts` (ocap-kernel)
- Add `exports: {}` to the SES Compartment endowments — Rolldown
unconditionally emits `Object.defineProperty(exports,
Symbol.toStringTag, ...)` in every IIFE bundle preamble, even for
modules with no exports; without an `exports` endowment this throws
inside the Compartment

### `stringify.test.ts` (kernel-utils)
- Oxc serialises function declarations with tabs instead of spaces, so
the whitespace-sensitive string comparison is replaced with `String(fn)`
to stay bundler-agnostic

## Testing

All 24 build tasks and all 45 test tasks pass (`yarn build` + `yarn
test:dev:quiet` from the monorepo root, both cached and uncached).

The key non-obvious behaviour changes are covered by the existing vat
integration tests in `@ocap/kernel-test` (which build real vat bundles
via `bundleVat` and execute them in SES Compartments) and by the
`evm-wallet-experiment` build (which exercises the 4-vat `Promise.all`
path through `kernel-cli`).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Medium Risk**
> Medium risk because this upgrades the build/test toolchain
(Vite/Vitest/Rolldown) and changes bundling semantics for vats and
extension builds, which can cause subtle runtime or packaging
regressions.
> 
> **Overview**
> Upgrades the monorepo to **Vite 8 / Vitest 4.1** (plus related tool
bumps like Playwright, jsdom, and static-copy/checker plugins) and
updates package configs accordingly.
> 
> Migrates build/test configs from `build.rollupOptions` to
`build.rolldownOptions`, adjusts static asset copy behavior (adds
`rename.stripBase`), and replaces `vite-tsconfig-paths` with Vite’s
native `resolve.tsconfigPaths` plus a custom `resolveId` hook for the
`@metamask/kernel-shims/endoify` test redirect.
> 
> Updates vat bundling to Rolldown by switching types/output options,
adding a `removeDynamicImportsPlugin()` workaround for IIFE constraints,
and serializing `bundleVat()` builds to avoid Rolldown concurrency
issues; `loadBundle()` is hardened to support Rolldown-generated IIFE
preambles (`exports`, `globalThis`, `global`). Minor follow-ups include
exporting `register` from the OpenClaw plugin entrypoint and making
`stringify` function tests bundler-output-agnostic.
> 
> <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit
3fc36bd. Bugbot is set up for automated
code reviews on this repo. Configure
[here](https://www.cursor.com/dashboard/bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

---------

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: sirtimid

package.json

@@ -72,8 +72,8 @@
     "@typescript-eslint/eslint-plugin": "^8.29.0",
     "@typescript-eslint/parser": "^8.29.0",
     "@typescript-eslint/utils": "^8.29.0",
-    "@vitest/coverage-v8": "^4.0.16",
-    "@vitest/eslint-plugin": "^1.6.5",
+    "@vitest/coverage-v8": "^4.1.3",
+    "@vitest/eslint-plugin": "^1.6.14",
     "@yarnpkg/types": "^4.0.1",
     "depcheck": "^1.4.7",
     "eslint": "^9.23.0",
@@ -90,7 +90,7 @@
     "lint-staged": "^15.5.0",
     "lodash": "^4.17.21",
     "patch-package": "^8.0.0",
-    "playwright": "^1.58.2",
+    "playwright": "^1.59.1",
     "prettier": "^3.5.3",
     "prettier-plugin-packagejson": "^2.5.10",
     "rimraf": "^6.0.1",
@@ -101,9 +101,8 @@
     "typedoc": "^0.28.1",
     "typescript": "~5.8.2",
     "typescript-eslint": "^8.29.0",
-    "vite": "^7.3.0",
-    "vite-tsconfig-paths": "^6.0.3",
-    "vitest": "^4.0.16",
+    "vite": "^8.0.6",
+    "vitest": "^4.1.3",
     "vitest-fetch-mock": "^0.4.5"
   },
   "packageManager": "yarn@4.12.0",
@@ -130,7 +129,9 @@
       "@metamask/kernel-cli>@metamask/kernel-shims>@libp2p/webrtc>node-datachannel": false,
       "@metamask/kernel-cli>@metamask/kernel-utils": false,
       "vitest>jsdom>ws>bufferutil": false,
-      "vitest>jsdom>ws>utf-8-validate": false
+      "vitest>jsdom>ws>utf-8-validate": false,
+      "@vitest/coverage-v8>@vitest/browser>ws>bufferutil": false,
+      "@vitest/coverage-v8>@vitest/browser>ws>utf-8-validate": false
     }
   },
   "resolutions": {

packages/create-package/package.json

@@ -60,7 +60,7 @@
     "@typescript-eslint/eslint-plugin": "^8.29.0",
     "@typescript-eslint/parser": "^8.29.0",
     "@typescript-eslint/utils": "^8.29.0",
-    "@vitest/eslint-plugin": "^1.6.5",
+    "@vitest/eslint-plugin": "^1.6.14",
     "depcheck": "^1.4.7",
     "eslint": "^9.23.0",
     "eslint-config-prettier": "^10.1.1",
@@ -77,8 +77,8 @@
     "typedoc": "^0.28.1",
     "typescript": "~5.8.2",
     "typescript-eslint": "^8.29.0",
-    "vite": "^7.3.0",
-    "vitest": "^4.0.16",
+    "vite": "^8.0.6",
+    "vitest": "^4.1.3",
     "yargs": "^17.7.2"
   },
   "engines": {

packages/evm-wallet-experiment/openclaw-plugin/index.ts

@@ -140,4 +140,5 @@ const entry: PluginEntry = {
   register,
 };
 
+export { register };
 export default entry;

packages/evm-wallet-experiment/package.json

@@ -99,7 +99,7 @@
     "@typescript-eslint/eslint-plugin": "^8.29.0",
     "@typescript-eslint/parser": "^8.29.0",
     "@typescript-eslint/utils": "^8.29.0",
-    "@vitest/eslint-plugin": "^1.6.5",
+    "@vitest/eslint-plugin": "^1.6.14",
     "depcheck": "^1.4.7",
     "eslint": "^9.23.0",
     "eslint-config-prettier": "^10.1.1",
@@ -116,8 +116,8 @@
     "typedoc": "^0.28.1",
     "typescript": "~5.8.2",
     "typescript-eslint": "^8.29.0",
-    "vite": "^7.3.0",
-    "vitest": "^4.0.16"
+    "vite": "^8.0.6",
+    "vitest": "^4.1.3"
   },
   "engines": {
     "node": ">=22"

packages/evm-wallet-experiment/test/integration/openclaw-plugin.integration.test.ts

@@ -6,7 +6,7 @@ import { dirname, resolve } from 'node:path';
 import { fileURLToPath } from 'node:url';
 import { afterAll, beforeAll, describe, expect, it } from 'vitest';
 
-import register from '../../openclaw-plugin/index.ts';
+import { register } from '../../openclaw-plugin/index.ts';
 import { makeWalletClusterConfig } from '../../src/cluster-config.ts';
 
 type ToolResponse = {

packages/evm-wallet-experiment/test/openclaw-plugin.test.ts

@@ -2,7 +2,7 @@ import { spawn } from 'node:child_process';
 import { EventEmitter } from 'node:events';
 import { beforeEach, describe, expect, it, vi } from 'vitest';
 
-import pluginEntry from '../openclaw-plugin/index.ts';
+import { register } from '../openclaw-plugin/index.ts';
 
 vi.mock('node:child_process', () => ({ spawn: vi.fn() }));
 
@@ -107,7 +107,7 @@ function setupPlugin(): Map<string, ToolDefinition> {
     },
   };
 
-  pluginEntry.register(api);
+  register(api);
   return tools;
 }
 

packages/extension/package.json

@@ -63,7 +63,7 @@
     "@metamask/eslint-config-typescript": "^15.0.0",
     "@ocap/kernel-test": "workspace:^",
     "@ocap/repo-tools": "workspace:^",
-    "@playwright/test": "^1.58.2",
+    "@playwright/test": "^1.59.1",
     "@testing-library/jest-dom": "^6.6.3",
     "@types/chrome": "^0.0.313",
     "@types/react": "^18.3.18",
@@ -72,7 +72,7 @@
     "@typescript-eslint/parser": "^8.29.0",
     "@typescript-eslint/utils": "^8.29.0",
     "@vitejs/plugin-react": "^5.1.2",
-    "@vitest/eslint-plugin": "^1.6.5",
+    "@vitest/eslint-plugin": "^1.6.14",
     "depcheck": "^1.4.7",
     "eslint": "^9.23.0",
     "eslint-config-prettier": "^10.1.1",
@@ -82,19 +82,19 @@
     "eslint-plugin-n": "^17.17.0",
     "eslint-plugin-prettier": "^5.2.6",
     "eslint-plugin-promise": "^7.2.1",
-    "jsdom": "^27.4.0",
-    "playwright": "^1.58.2",
+    "jsdom": "^29.0.2",
+    "playwright": "^1.59.1",
     "prettier": "^3.5.3",
     "rimraf": "^6.0.1",
     "tsx": "^4.20.6",
     "turbo": "^2.9.1",
     "typedoc": "^0.28.1",
     "typescript": "~5.8.2",
     "typescript-eslint": "^8.29.0",
-    "vite": "^7.3.0",
-    "vite-plugin-checker": "^0.9.1",
-    "vite-plugin-static-copy": "^2.3.2",
-    "vitest": "^4.0.16"
+    "vite": "^8.0.6",
+    "vite-plugin-checker": "^0.12.0",
+    "vite-plugin-static-copy": "^4.0.1",
+    "vitest": "^4.1.3"
   },
   "engines": {
     "node": ">=22"

packages/extension/vite.config.ts

@@ -64,7 +64,7 @@ export default defineConfig(({ mode }) => {
       outDir,
       minify: !isDev,
       sourcemap: isDev ? 'inline' : false,
-      rollupOptions: {
+      rolldownOptions: {
         input: {
           background: path.resolve(sourceDir, 'background.ts'),
           offscreen: path.resolve(sourceDir, 'offscreen.html'),
@@ -79,13 +79,7 @@ export default defineConfig(({ mode }) => {
         },
         output: {
           entryFileNames: '[name].js',
-          chunkFileNames: (chunkInfo) => {
-            // Rename _commonjsHelpers to avoid underscore prefix extension issues
-            if (chunkInfo.name === '_commonjsHelpers') {
-              return 'commonjsHelpers.js';
-            }
-            return '[name].js';
-          },
+          chunkFileNames: '[name].js',
           assetFileNames: '[name].[ext]',
         },
       },
@@ -107,7 +101,9 @@ export default defineConfig(({ mode }) => {
       jsTrustedPrelude({ trustedPreludes }),
       viteStaticCopy({
         targets: staticCopyTargets.map((src) =>
-          typeof src === 'string' ? { src, dest: './' } : src,
+          typeof src === 'string'
+            ? { src, dest: './', rename: { stripBase: true } }
+            : src,
         ),
         watch: { reloadPageOnChange: true },
         silent: isDev,

packages/kernel-agents-repl/package.json

@@ -59,7 +59,7 @@
     "@typescript-eslint/eslint-plugin": "^8.29.0",
     "@typescript-eslint/parser": "^8.29.0",
     "@typescript-eslint/utils": "^8.29.0",
-    "@vitest/eslint-plugin": "^1.6.5",
+    "@vitest/eslint-plugin": "^1.6.14",
     "depcheck": "^1.4.7",
     "eslint": "^9.23.0",
     "eslint-config-prettier": "^10.1.1",
@@ -75,8 +75,8 @@
     "typedoc": "^0.28.1",
     "typescript": "~5.8.2",
     "typescript-eslint": "^8.29.0",
-    "vite": "^7.3.0",
-    "vitest": "^4.0.16"
+    "vite": "^8.0.6",
+    "vitest": "^4.1.3"
   },
   "engines": {
     "node": ">=22"

packages/kernel-agents/package.json

@@ -169,7 +169,7 @@
     "@typescript-eslint/eslint-plugin": "^8.29.0",
     "@typescript-eslint/parser": "^8.29.0",
     "@typescript-eslint/utils": "^8.29.0",
-    "@vitest/eslint-plugin": "^1.6.5",
+    "@vitest/eslint-plugin": "^1.6.14",
     "depcheck": "^1.4.7",
     "eslint": "^9.23.0",
     "eslint-config-prettier": "^10.1.1",
@@ -185,8 +185,8 @@
     "typedoc": "^0.28.1",
     "typescript": "~5.8.2",
     "typescript-eslint": "^8.29.0",
-    "vite": "^7.3.0",
-    "vitest": "^4.0.16"
+    "vite": "^8.0.6",
+    "vitest": "^4.1.3"
   },
   "engines": {
     "node": ">=22"