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diff --git a/crates/next-core/src/browser_variant_modules.rs b/crates/next-core/src/browser_variant_modules.rs
index 1e1b9295b4..133ef25ace 100644
--- a/crates/next-core/src/browser_variant_modules.rs
+++ b/crates/next-core/src/browser_variant_modules.rs
@@ -11,6 +11,8 @@
 #[rustfmt::skip]
 pub static BROWSER_VARIANT_MODULES: &[&str] = &[
     "client/components/client-boundary-params",
+    "client/components/instant-samples",
+    "client/components/instant-validation/impl",
     "client/components/navigation-dynamic-rendering",
     "client/components/server-async-storage",
     "client/components/unstable-rethrow",
diff --git a/packages/next/src/build/browser-variant-modules.ts b/packages/next/src/build/browser-variant-modules.ts
index bf7685e857..45563cf715 100644
--- a/packages/next/src/build/browser-variant-modules.ts
+++ b/packages/next/src/build/browser-variant-modules.ts
@@ -7,6 +7,8 @@
 // `packages/next/dist` (extension omitted).
 export const browserVariantModules = [
   'client/components/client-boundary-params',
+  'client/components/instant-samples',
+  'client/components/instant-validation/impl',
   'client/components/navigation-dynamic-rendering',
   'client/components/server-async-storage',
   'client/components/unstable-rethrow',
diff --git a/packages/next/src/client/components/instant-samples.browser.ts b/packages/next/src/client/components/instant-samples.browser.ts
new file mode 100644
index 0000000000..35c2fbf65a
--- /dev/null
+++ b/packages/next/src/client/components/instant-samples.browser.ts
@@ -0,0 +1,3 @@
+export const instrumentParamsForClientValidation = undefined
+export const expectCompleteParamsInClientValidation = undefined
+export const instrumentSearchParamsForClientValidation = undefined
diff --git a/packages/next/src/server/app-render/instant-validation/instant-samples-client.ts b/packages/next/src/client/components/instant-samples.ts
similarity index 88%
rename from packages/next/src/server/app-render/instant-validation/instant-samples-client.ts
rename to packages/next/src/client/components/instant-samples.ts
index 15101787cb..7bd30ba8b1 100644
--- a/packages/next/src/server/app-render/instant-validation/instant-samples-client.ts
+++ b/packages/next/src/client/components/instant-samples.ts
@@ -1,13 +1,13 @@
-import type { Params } from '../../request/params'
-import type { ReadonlyURLSearchParams } from '../../../client/components/readonly-url-search-params'
-import { workUnitAsyncStorage } from '../work-unit-async-storage.external'
-import { workAsyncStorage } from '../work-async-storage.external'
+import type { Params } from '../../server/request/params'
+import type { ReadonlyURLSearchParams } from './readonly-url-search-params'
+import { workUnitAsyncStorage } from '../../server/app-render/work-unit-async-storage.external'
+import { workAsyncStorage } from '../../server/app-render/work-async-storage.external'
 import {
   createExhaustiveParamsProxy,
   createExhaustiveURLSearchParamsProxy,
   trackMissingSampleErrorAndThrow,
-} from './instant-samples'
-import { InstantValidationError } from './instant-validation-error'
+} from '../../server/app-render/instant-validation/instant-samples'
+import { InstantValidationError } from '../../server/app-render/instant-validation/instant-validation-error'
 
 export function instrumentParamsForClientValidation<TPArams extends Params>(
   underlyingParams: TPArams
diff --git a/packages/next/src/client/components/instant-validation/boundary.tsx b/packages/next/src/client/components/instant-validation/boundary.tsx
index cf39318c3a..8ed8ccd7fe 100644
--- a/packages/next/src/client/components/instant-validation/boundary.tsx
+++ b/packages/next/src/client/components/instant-validation/boundary.tsx
@@ -1,29 +1,9 @@
 'use client'
-
-// This facade ensures that the boundary code is DCE'd in browser bundles.
-//
-// It also exists to satisfy `browser-chunks.test.ts`, which looks for
-// references to code in `packages/next/src/server` in browser bundles and errors if it finds any.
-// A "use client" module seems to always have always have an entry in the browser bundle,
-// so this module cannot be colocated with the rest of the instant validation code,
-// because it ends up looking like it's importing server code in the browser
-// even though all the server code inside is actually DCE'd.
-
-const {
-  InstantValidationBoundaryContext,
-  PlaceValidationBoundaryBelowThisLevel,
-  RenderValidationBoundaryAtThisLevel,
-  SlotMarker,
-} =
-  typeof window === 'undefined' && process.env.__NEXT_CACHE_COMPONENTS
-    ? // TODO(browser-variant): migrate to a .ts/.browser.ts split so the browser bundle drops the server branch; see scripts/generate-browser-variant-aliases.mjs
-      // ast-grep-ignore: no-typeof-window-require-tsx
-      (require('../../../server/app-render/instant-validation/boundary-impl') as typeof import('../../../server/app-render/instant-validation/boundary-impl'))
-    : ({} as typeof import('../../../server/app-render/instant-validation/boundary-impl'))
-
+// We can't fork a `use client` boundary based on node-client vs browser-client.
+// We need to fork one level deeper.
 export {
   InstantValidationBoundaryContext,
   PlaceValidationBoundaryBelowThisLevel,
   RenderValidationBoundaryAtThisLevel,
   SlotMarker,
-}
+} from './impl'
diff --git a/packages/next/src/client/components/instant-validation/impl.browser.tsx b/packages/next/src/client/components/instant-validation/impl.browser.tsx
new file mode 100644
index 0000000000..fad4049807
--- /dev/null
+++ b/packages/next/src/client/components/instant-validation/impl.browser.tsx
@@ -0,0 +1,4 @@
+export const InstantValidationBoundaryContext = null
+export const PlaceValidationBoundaryBelowThisLevel = null
+export const RenderValidationBoundaryAtThisLevel = null
+export const SlotMarker = null
diff --git a/packages/next/src/client/components/instant-validation/impl.tsx b/packages/next/src/client/components/instant-validation/impl.tsx
new file mode 100644
index 0000000000..62e291f209
--- /dev/null
+++ b/packages/next/src/client/components/instant-validation/impl.tsx
@@ -0,0 +1,6 @@
+export {
+  InstantValidationBoundaryContext,
+  PlaceValidationBoundaryBelowThisLevel,
+  RenderValidationBoundaryAtThisLevel,
+  SlotMarker,
+} from '../../../server/app-render/instant-validation/boundary-impl'
diff --git a/packages/next/src/client/components/layout-router.tsx b/packages/next/src/client/components/layout-router.tsx
index efdd8d9187..52019013c5 100644
--- a/packages/next/src/client/components/layout-router.tsx
+++ b/packages/next/src/client/components/layout-router.tsx
@@ -33,6 +33,10 @@ import { ErrorBoundary } from './error-boundary'
 import { disableSmoothScrollDuringRouteTransition } from '../../shared/lib/router/utils/disable-smooth-scroll'
 import { RedirectBoundary } from './redirect-boundary'
 import { HTTPAccessFallbackBoundary } from './http-access-fallback/error-boundary'
+import {
+  InstantValidationBoundaryContext,
+  RenderValidationBoundaryAtThisLevel,
+} from './instant-validation/boundary'
 import { createRouterCacheKey } from './router-reducer/create-router-cache-key'
 import {
   useRouterBFCache,
@@ -670,10 +674,6 @@ export default function OuterLayoutRouter({
 
   let maybeValidationBoundaryId: string | null = null
   if (typeof window === 'undefined' && process.env.__NEXT_CACHE_COMPONENTS) {
-    const { InstantValidationBoundaryContext } =
-      // TODO(browser-variant): migrate to a .ts/.browser.ts split so the browser bundle drops the server branch; see scripts/generate-browser-variant-aliases.mjs
-      // ast-grep-ignore: no-typeof-window-require-tsx
-      require('./instant-validation/boundary') as typeof import('./instant-validation/boundary')
     maybeValidationBoundaryId = use(InstantValidationBoundaryContext)
   }
 
@@ -812,10 +812,6 @@ export default function OuterLayoutRouter({
       process.env.__NEXT_CACHE_COMPONENTS &&
       typeof maybeValidationBoundaryId === 'string'
     ) {
-      const { RenderValidationBoundaryAtThisLevel } =
-        // TODO(browser-variant): migrate to a .ts/.browser.ts split so the browser bundle drops the server branch; see scripts/generate-browser-variant-aliases.mjs
-        // ast-grep-ignore: no-typeof-window-require-tsx
-        require('./instant-validation/boundary') as typeof import('./instant-validation/boundary')
       templateValue = (
         <RenderValidationBoundaryAtThisLevel id={maybeValidationBoundaryId}>
           {templateValue}
diff --git a/packages/next/src/client/components/navigation.ts b/packages/next/src/client/components/navigation.ts
index 0c7dc84d32..2e1df203d8 100644
--- a/packages/next/src/client/components/navigation.ts
+++ b/packages/next/src/client/components/navigation.ts
@@ -27,12 +27,9 @@ const {
   instrumentParamsForClientValidation,
   instrumentSearchParamsForClientValidation,
   expectCompleteParamsInClientValidation,
-} =
-  typeof window === 'undefined' && process.env.__NEXT_CACHE_COMPONENTS
-    ? // TODO(browser-variant): migrate to a .ts/.browser.ts split so the browser bundle drops the server branch; see scripts/generate-browser-variant-aliases.mjs
-      // ast-grep-ignore: no-typeof-window-require
-      (require('../../server/app-render/instant-validation/instant-samples-client') as typeof import('../../server/app-render/instant-validation/instant-samples-client'))
-    : {}
+} = process.env.__NEXT_CACHE_COMPONENTS
+  ? (require('./instant-samples') as typeof import('./instant-samples'))
+  : {}
 
 /**
  * A [Client Component](https://nextjs.org/docs/app/building-your-application/rendering/client-components) hook