diff --git a/e2e/react-start/basic/src/routeTree.gen.ts b/e2e/react-start/basic/src/routeTree.gen.ts
index b6fc9282f67..1298d9b2113 100644
--- a/e2e/react-start/basic/src/routeTree.gen.ts
+++ b/e2e/react-start/basic/src/routeTree.gen.ts
@@ -23,6 +23,7 @@ import { Route as StreamRouteImport } from './routes/stream'
 import { Route as ScriptsRouteImport } from './routes/scripts'
 import { Route as PostsRouteImport } from './routes/posts'
 import { Route as LinksRouteImport } from './routes/links'
+import { Route as InlineScriptsRouteImport } from './routes/inline-scripts'
 import { Route as DeferredRouteImport } from './routes/deferred'
 import { Route as LayoutRouteImport } from './routes/_layout'
 import { Route as SearchParamsRouteRouteImport } from './routes/search-params/route'
@@ -90,6 +91,11 @@ const LinksRoute = LinksRouteImport.update({
   path: '/links',
   getParentRoute: () => rootRouteImport,
 } as any)
+const InlineScriptsRoute = InlineScriptsRouteImport.update({
+  id: '/inline-scripts',
+  path: '/inline-scripts',
+  getParentRoute: () => rootRouteImport,
+} as any)
 const DeferredRoute = DeferredRouteImport.update({
   id: '/deferred',
   path: '/deferred',
@@ -264,6 +270,7 @@ export interface FileRoutesByFullPath {
   '/not-found': typeof NotFoundRouteRouteWithChildren
   '/search-params': typeof SearchParamsRouteRouteWithChildren
   '/deferred': typeof DeferredRoute
+  '/inline-scripts': typeof InlineScriptsRoute
   '/links': typeof LinksRoute
   '/posts': typeof PostsRouteWithChildren
   '/scripts': typeof ScriptsRoute
@@ -298,6 +305,7 @@ export interface FileRoutesByFullPath {
 export interface FileRoutesByTo {
   '/': typeof IndexRoute
   '/deferred': typeof DeferredRoute
+  '/inline-scripts': typeof InlineScriptsRoute
   '/links': typeof LinksRoute
   '/scripts': typeof ScriptsRoute
   '/stream': typeof StreamRoute
@@ -332,6 +340,7 @@ export interface FileRoutesById {
   '/search-params': typeof SearchParamsRouteRouteWithChildren
   '/_layout': typeof LayoutRouteWithChildren
   '/deferred': typeof DeferredRoute
+  '/inline-scripts': typeof InlineScriptsRoute
   '/links': typeof LinksRoute
   '/posts': typeof PostsRouteWithChildren
   '/scripts': typeof ScriptsRoute
@@ -372,6 +381,7 @@ export interface FileRouteTypes {
     | '/not-found'
     | '/search-params'
     | '/deferred'
+    | '/inline-scripts'
     | '/links'
     | '/posts'
     | '/scripts'
@@ -406,6 +416,7 @@ export interface FileRouteTypes {
   to:
     | '/'
     | '/deferred'
+    | '/inline-scripts'
     | '/links'
     | '/scripts'
     | '/stream'
@@ -439,6 +450,7 @@ export interface FileRouteTypes {
     | '/search-params'
     | '/_layout'
     | '/deferred'
+    | '/inline-scripts'
     | '/links'
     | '/posts'
     | '/scripts'
@@ -479,6 +491,7 @@ export interface RootRouteChildren {
   SearchParamsRouteRoute: typeof SearchParamsRouteRouteWithChildren
   LayoutRoute: typeof LayoutRouteWithChildren
   DeferredRoute: typeof DeferredRoute
+  InlineScriptsRoute: typeof InlineScriptsRoute
   LinksRoute: typeof LinksRoute
   PostsRoute: typeof PostsRouteWithChildren
   ScriptsRoute: typeof ScriptsRoute
@@ -552,6 +565,13 @@ declare module '@tanstack/react-router' {
       preLoaderRoute: typeof DeferredRouteImport
       parentRoute: typeof rootRouteImport
     }
+    '/inline-scripts': {
+      id: '/inline-scripts'
+      path: '/inline-scripts'
+      fullPath: '/inline-scripts'
+      preLoaderRoute: typeof InlineScriptsRouteImport
+      parentRoute: typeof rootRouteImport
+    }
     '/links': {
       id: '/links'
       path: '/links'
@@ -829,6 +849,13 @@ declare module '@tanstack/react-start/server' {
       preLoaderRoute: unknown
       parentRoute: typeof rootServerRouteImport
     }
+    '/inline-scripts': {
+      id: '/inline-scripts'
+      path: '/inline-scripts'
+      fullPath: '/inline-scripts'
+      preLoaderRoute: unknown
+      parentRoute: typeof rootServerRouteImport
+    }
     '/links': {
       id: '/links'
       path: '/links'
@@ -1148,6 +1175,23 @@ declare module './routes/deferred' {
     unknown
   >
 }
+declare module './routes/inline-scripts' {
+  const createFileRoute: CreateFileRoute<
+    '/inline-scripts',
+    FileRoutesByPath['/inline-scripts']['parentRoute'],
+    FileRoutesByPath['/inline-scripts']['id'],
+    FileRoutesByPath['/inline-scripts']['path'],
+    FileRoutesByPath['/inline-scripts']['fullPath']
+  >
+
+  const createServerFileRoute: CreateServerFileRoute<
+    ServerFileRoutesByPath['/inline-scripts']['parentRoute'],
+    ServerFileRoutesByPath['/inline-scripts']['id'],
+    ServerFileRoutesByPath['/inline-scripts']['path'],
+    ServerFileRoutesByPath['/inline-scripts']['fullPath'],
+    unknown
+  >
+}
 declare module './routes/links' {
   const createFileRoute: CreateFileRoute<
     '/links',
@@ -1858,6 +1902,7 @@ const rootRouteChildren: RootRouteChildren = {
   SearchParamsRouteRoute: SearchParamsRouteRouteWithChildren,
   LayoutRoute: LayoutRouteWithChildren,
   DeferredRoute: DeferredRoute,
+  InlineScriptsRoute: InlineScriptsRoute,
   LinksRoute: LinksRoute,
   PostsRoute: PostsRouteWithChildren,
   ScriptsRoute: ScriptsRoute,
diff --git a/e2e/react-start/basic/src/routes/__root.tsx b/e2e/react-start/basic/src/routes/__root.tsx
index 3283cb8a1ae..9c3a7138b0e 100644
--- a/e2e/react-start/basic/src/routes/__root.tsx
+++ b/e2e/react-start/basic/src/routes/__root.tsx
@@ -141,6 +141,14 @@ function RootDocument({ children }: { children: React.ReactNode }) {
           >
             Scripts
           </Link>{' '}
+          <Link
+            to="/inline-scripts"
+            activeProps={{
+              className: 'font-bold',
+            }}
+          >
+            Inline Scripts
+          </Link>{' '}
           <Link
             to="/deferred"
             activeProps={{
diff --git a/e2e/react-start/basic/src/routes/inline-scripts.tsx b/e2e/react-start/basic/src/routes/inline-scripts.tsx
new file mode 100644
index 00000000000..282cb93804c
--- /dev/null
+++ b/e2e/react-start/basic/src/routes/inline-scripts.tsx
@@ -0,0 +1,28 @@
+export const Route = createFileRoute({
+  head: () => ({
+    scripts: [
+      {
+        children:
+          'window.INLINE_SCRIPT_1 = true; console.log("Inline script 1 executed");',
+      },
+      {
+        children:
+          'window.INLINE_SCRIPT_2 = "test"; console.log("Inline script 2 executed");',
+        type: 'text/javascript',
+      },
+    ],
+  }),
+  component: InlineScriptsComponent,
+})
+
+function InlineScriptsComponent() {
+  return (
+    <div className="p-2">
+      <h3 data-testid="inline-scripts-test-heading">Inline Scripts Test</h3>
+      <p>
+        This route tests inline script duplication prevention. Two inline
+        scripts should be loaded.
+      </p>
+    </div>
+  )
+}
diff --git a/e2e/react-start/basic/tests/navigation.spec.ts b/e2e/react-start/basic/tests/navigation.spec.ts
index 5d21f2adbe1..62433a0134d 100644
--- a/e2e/react-start/basic/tests/navigation.spec.ts
+++ b/e2e/react-start/basic/tests/navigation.spec.ts
@@ -34,7 +34,7 @@ test('Navigating nested layouts', async ({ page }) => {
 
 test('client side navigating to a route with scripts', async ({ page }) => {
   await page.goto('/')
-  await page.getByRole('link', { name: 'Scripts' }).click()
+  await page.getByRole('link', { name: 'Scripts', exact: true }).click()
   await expect(page.getByTestId('scripts-test-heading')).toBeInViewport()
   expect(await page.evaluate('window.SCRIPT_1')).toBe(true)
   expect(await page.evaluate('window.SCRIPT_2')).toBe(undefined)
diff --git a/e2e/react-start/basic/tests/script-duplication.spec.ts b/e2e/react-start/basic/tests/script-duplication.spec.ts
new file mode 100644
index 00000000000..2ed98a3a73f
--- /dev/null
+++ b/e2e/react-start/basic/tests/script-duplication.spec.ts
@@ -0,0 +1,143 @@
+import { expect, test } from '@playwright/test'
+
+test.describe('Script Duplication Prevention', () => {
+  test('should not create duplicate scripts on SSR route', async ({ page }) => {
+    await page.goto('/scripts')
+
+    await expect(page.getByTestId('scripts-test-heading')).toBeInViewport()
+
+    const scriptCount = await page.evaluate(() => {
+      return document.querySelectorAll('script[src="script.js"]').length
+    })
+
+    expect(scriptCount).toBe(1)
+
+    expect(await page.evaluate('window.SCRIPT_1')).toBe(true)
+  })
+
+  test('should not create duplicate scripts during client-side navigation', async ({
+    page,
+  }) => {
+    await page.goto('/')
+
+    await page.getByRole('link', { name: 'Scripts', exact: true }).click()
+    await expect(page.getByTestId('scripts-test-heading')).toBeInViewport()
+
+    const firstNavCount = await page.evaluate(() => {
+      return document.querySelectorAll('script[src="script.js"]').length
+    })
+    expect(firstNavCount).toBe(1)
+
+    await page.getByRole('link', { name: 'Home' }).click()
+    await expect(page.getByRole('link', { name: 'Posts' })).toBeVisible()
+
+    await page.getByRole('link', { name: 'Scripts', exact: true }).click()
+    await expect(page.getByTestId('scripts-test-heading')).toBeInViewport()
+
+    const secondNavCount = await page.evaluate(() => {
+      return document.querySelectorAll('script[src="script.js"]').length
+    })
+    expect(secondNavCount).toBe(1)
+
+    expect(await page.evaluate('window.SCRIPT_1')).toBe(true)
+  })
+
+  test('should not create duplicate scripts with multiple navigation cycles', async ({
+    page,
+  }) => {
+    await page.goto('/')
+
+    for (let i = 0; i < 3; i++) {
+      await page.getByRole('link', { name: 'Scripts', exact: true }).click()
+      await expect(page.getByTestId('scripts-test-heading')).toBeInViewport()
+
+      await page.getByRole('link', { name: 'Home' }).click()
+      await expect(page.getByRole('link', { name: 'Posts' })).toBeVisible()
+    }
+
+    await page.getByRole('link', { name: 'Scripts', exact: true }).click()
+    await expect(page.getByTestId('scripts-test-heading')).toBeInViewport()
+
+    const finalCount = await page.evaluate(() => {
+      return document.querySelectorAll('script[src="script.js"]').length
+    })
+    expect(finalCount).toBe(1)
+
+    expect(await page.evaluate('window.SCRIPT_1')).toBe(true)
+  })
+
+  test('should not create duplicate inline scripts', async ({ page }) => {
+    await page.goto('/inline-scripts')
+
+    await expect(
+      page.getByTestId('inline-scripts-test-heading'),
+    ).toBeInViewport()
+
+    const script1Count = await page.evaluate(() => {
+      const scripts = Array.from(document.querySelectorAll('script:not([src])'))
+      return scripts.filter(
+        (script) =>
+          script.textContent &&
+          script.textContent.includes('window.INLINE_SCRIPT_1 = true'),
+      ).length
+    })
+
+    const script2Count = await page.evaluate(() => {
+      const scripts = Array.from(document.querySelectorAll('script:not([src])'))
+      return scripts.filter(
+        (script) =>
+          script.textContent &&
+          script.textContent.includes('window.INLINE_SCRIPT_2 = "test"'),
+      ).length
+    })
+
+    expect(script1Count).toBe(1)
+    expect(script2Count).toBe(1)
+
+    expect(await page.evaluate('window.INLINE_SCRIPT_1')).toBe(true)
+    expect(await page.evaluate('window.INLINE_SCRIPT_2')).toBe('test')
+  })
+
+  test('should not create duplicate inline scripts during client-side navigation', async ({
+    page,
+  }) => {
+    await page.goto('/')
+
+    await page.getByRole('link', { name: 'Inline Scripts' }).click()
+    await expect(
+      page.getByTestId('inline-scripts-test-heading'),
+    ).toBeInViewport()
+
+    const firstNavScript1Count = await page.evaluate(() => {
+      const scripts = Array.from(document.querySelectorAll('script:not([src])'))
+      return scripts.filter(
+        (script) =>
+          script.textContent &&
+          script.textContent.includes('window.INLINE_SCRIPT_1 = true'),
+      ).length
+    })
+    expect(firstNavScript1Count).toBe(1)
+
+    await page.getByRole('link', { name: 'Home' }).click()
+    await expect(page.getByRole('link', { name: 'Posts' })).toBeVisible()
+
+    await page.getByRole('link', { name: 'Inline Scripts' }).click()
+    await expect(
+      page.getByTestId('inline-scripts-test-heading'),
+    ).toBeInViewport()
+
+    const secondNavScript1Count = await page.evaluate(() => {
+      const scripts = Array.from(document.querySelectorAll('script:not([src])'))
+      return scripts.filter(
+        (script) =>
+          script.textContent &&
+          script.textContent.includes('window.INLINE_SCRIPT_1 = true'),
+      ).length
+    })
+    expect(secondNavScript1Count).toBe(1)
+
+    // Verify the scripts are still working
+    expect(await page.evaluate('window.INLINE_SCRIPT_1')).toBe(true)
+    expect(await page.evaluate('window.INLINE_SCRIPT_2')).toBe('test')
+  })
+})
diff --git a/e2e/solid-start/basic/src/routeTree.gen.ts b/e2e/solid-start/basic/src/routeTree.gen.ts
index 307552541dc..cf6db920d4e 100644
--- a/e2e/solid-start/basic/src/routeTree.gen.ts
+++ b/e2e/solid-start/basic/src/routeTree.gen.ts
@@ -16,6 +16,7 @@ import { Route as StreamRouteImport } from './routes/stream'
 import { Route as ScriptsRouteImport } from './routes/scripts'
 import { Route as PostsRouteImport } from './routes/posts'
 import { Route as LinksRouteImport } from './routes/links'
+import { Route as InlineScriptsRouteImport } from './routes/inline-scripts'
 import { Route as DeferredRouteImport } from './routes/deferred'
 import { Route as LayoutRouteImport } from './routes/_layout'
 import { Route as SearchParamsRouteRouteImport } from './routes/search-params/route'
@@ -74,6 +75,11 @@ const LinksRoute = LinksRouteImport.update({
   path: '/links',
   getParentRoute: () => rootRouteImport,
 } as any)
+const InlineScriptsRoute = InlineScriptsRouteImport.update({
+  id: '/inline-scripts',
+  path: '/inline-scripts',
+  getParentRoute: () => rootRouteImport,
+} as any)
 const DeferredRoute = DeferredRouteImport.update({
   id: '/deferred',
   path: '/deferred',
@@ -234,6 +240,7 @@ export interface FileRoutesByFullPath {
   '/not-found': typeof NotFoundRouteRouteWithChildren
   '/search-params': typeof SearchParamsRouteRouteWithChildren
   '/deferred': typeof DeferredRoute
+  '/inline-scripts': typeof InlineScriptsRoute
   '/links': typeof LinksRoute
   '/posts': typeof PostsRouteWithChildren
   '/scripts': typeof ScriptsRoute
@@ -265,6 +272,7 @@ export interface FileRoutesByFullPath {
 export interface FileRoutesByTo {
   '/': typeof IndexRoute
   '/deferred': typeof DeferredRoute
+  '/inline-scripts': typeof InlineScriptsRoute
   '/links': typeof LinksRoute
   '/scripts': typeof ScriptsRoute
   '/stream': typeof StreamRoute
@@ -297,6 +305,7 @@ export interface FileRoutesById {
   '/search-params': typeof SearchParamsRouteRouteWithChildren
   '/_layout': typeof LayoutRouteWithChildren
   '/deferred': typeof DeferredRoute
+  '/inline-scripts': typeof InlineScriptsRoute
   '/links': typeof LinksRoute
   '/posts': typeof PostsRouteWithChildren
   '/scripts': typeof ScriptsRoute
@@ -333,6 +342,7 @@ export interface FileRouteTypes {
     | '/not-found'
     | '/search-params'
     | '/deferred'
+    | '/inline-scripts'
     | '/links'
     | '/posts'
     | '/scripts'
@@ -364,6 +374,7 @@ export interface FileRouteTypes {
   to:
     | '/'
     | '/deferred'
+    | '/inline-scripts'
     | '/links'
     | '/scripts'
     | '/stream'
@@ -395,6 +406,7 @@ export interface FileRouteTypes {
     | '/search-params'
     | '/_layout'
     | '/deferred'
+    | '/inline-scripts'
     | '/links'
     | '/posts'
     | '/scripts'
@@ -431,6 +443,7 @@ export interface RootRouteChildren {
   SearchParamsRouteRoute: typeof SearchParamsRouteRouteWithChildren
   LayoutRoute: typeof LayoutRouteWithChildren
   DeferredRoute: typeof DeferredRoute
+  InlineScriptsRoute: typeof InlineScriptsRoute
   LinksRoute: typeof LinksRoute
   PostsRoute: typeof PostsRouteWithChildren
   ScriptsRoute: typeof ScriptsRoute
@@ -502,6 +515,13 @@ declare module '@tanstack/solid-router' {
       preLoaderRoute: typeof LinksRouteImport
       parentRoute: typeof rootRouteImport
     }
+    '/inline-scripts': {
+      id: '/inline-scripts'
+      path: '/inline-scripts'
+      fullPath: '/inline-scripts'
+      preLoaderRoute: typeof InlineScriptsRouteImport
+      parentRoute: typeof rootRouteImport
+    }
     '/deferred': {
       id: '/deferred'
       path: '/deferred'
@@ -843,6 +863,7 @@ const rootRouteChildren: RootRouteChildren = {
   SearchParamsRouteRoute: SearchParamsRouteRouteWithChildren,
   LayoutRoute: LayoutRouteWithChildren,
   DeferredRoute: DeferredRoute,
+  InlineScriptsRoute: InlineScriptsRoute,
   LinksRoute: LinksRoute,
   PostsRoute: PostsRouteWithChildren,
   ScriptsRoute: ScriptsRoute,
diff --git a/e2e/solid-start/basic/src/routes/__root.tsx b/e2e/solid-start/basic/src/routes/__root.tsx
index 6598d8b3164..fe2dc996f04 100644
--- a/e2e/solid-start/basic/src/routes/__root.tsx
+++ b/e2e/solid-start/basic/src/routes/__root.tsx
@@ -103,6 +103,14 @@ function RootComponent() {
         >
           Scripts
         </Link>{' '}
+        <Link
+          to="/inline-scripts"
+          activeProps={{
+            class: 'font-bold',
+          }}
+        >
+          Inline Scripts
+        </Link>{' '}
         <Link
           to="/deferred"
           activeProps={{
diff --git a/e2e/solid-start/basic/src/routes/inline-scripts.tsx b/e2e/solid-start/basic/src/routes/inline-scripts.tsx
new file mode 100644
index 00000000000..a2833c2ae1e
--- /dev/null
+++ b/e2e/solid-start/basic/src/routes/inline-scripts.tsx
@@ -0,0 +1,30 @@
+import { createFileRoute } from '@tanstack/solid-router'
+
+export const Route = createFileRoute('/inline-scripts')({
+  head: () => ({
+    scripts: [
+      {
+        children:
+          'window.INLINE_SCRIPT_1 = true; console.log("Inline script 1 executed");',
+      },
+      {
+        children:
+          'window.INLINE_SCRIPT_2 = "test"; console.log("Inline script 2 executed");',
+        type: 'text/javascript',
+      },
+    ],
+  }),
+  component: InlineScriptsComponent,
+})
+
+function InlineScriptsComponent() {
+  return (
+    <div class="p-2">
+      <h3 data-testid="inline-scripts-test-heading">Inline Scripts Test</h3>
+      <p>
+        This route tests inline script duplication prevention. Two inline
+        scripts should be loaded.
+      </p>
+    </div>
+  )
+}
diff --git a/e2e/solid-start/basic/tests/navigation.spec.ts b/e2e/solid-start/basic/tests/navigation.spec.ts
index 5d21f2adbe1..62433a0134d 100644
--- a/e2e/solid-start/basic/tests/navigation.spec.ts
+++ b/e2e/solid-start/basic/tests/navigation.spec.ts
@@ -34,7 +34,7 @@ test('Navigating nested layouts', async ({ page }) => {
 
 test('client side navigating to a route with scripts', async ({ page }) => {
   await page.goto('/')
-  await page.getByRole('link', { name: 'Scripts' }).click()
+  await page.getByRole('link', { name: 'Scripts', exact: true }).click()
   await expect(page.getByTestId('scripts-test-heading')).toBeInViewport()
   expect(await page.evaluate('window.SCRIPT_1')).toBe(true)
   expect(await page.evaluate('window.SCRIPT_2')).toBe(undefined)
diff --git a/e2e/solid-start/basic/tests/script-duplication.spec.ts b/e2e/solid-start/basic/tests/script-duplication.spec.ts
new file mode 100644
index 00000000000..b6c9e9e2fd4
--- /dev/null
+++ b/e2e/solid-start/basic/tests/script-duplication.spec.ts
@@ -0,0 +1,138 @@
+import { expect, test } from '@playwright/test'
+
+test.describe('Script Duplication Prevention', () => {
+  test('should not create duplicate scripts on SSR route', async ({ page }) => {
+    await page.goto('/scripts')
+
+    await expect(page.getByTestId('scripts-test-heading')).toBeInViewport()
+
+    const scriptCount = await page.evaluate(() => {
+      return document.querySelectorAll('script[src="script.js"]').length
+    })
+
+    expect(scriptCount).toBe(1)
+    expect(await page.evaluate('window.SCRIPT_1')).toBe(true)
+  })
+
+  test('should not create duplicate scripts during client-side navigation', async ({
+    page,
+  }) => {
+    await page.goto('/')
+
+    await page.getByRole('link', { name: 'Scripts', exact: true }).click()
+    await expect(page.getByTestId('scripts-test-heading')).toBeInViewport()
+
+    const firstNavCount = await page.evaluate(() => {
+      return document.querySelectorAll('script[src="script.js"]').length
+    })
+    expect(firstNavCount).toBe(1)
+
+    await page.getByRole('link', { name: 'Home' }).click()
+    await expect(page.getByRole('link', { name: 'Posts' })).toBeVisible()
+
+    await page.getByRole('link', { name: 'Scripts', exact: true }).click()
+    await expect(page.getByTestId('scripts-test-heading')).toBeInViewport()
+
+    const secondNavCount = await page.evaluate(() => {
+      return document.querySelectorAll('script[src="script.js"]').length
+    })
+    expect(secondNavCount).toBe(1)
+    expect(await page.evaluate('window.SCRIPT_1')).toBe(true)
+  })
+
+  test('should not create duplicate scripts with multiple navigation cycles', async ({
+    page,
+  }) => {
+    await page.goto('/')
+
+    for (let i = 0; i < 3; i++) {
+      await page.getByRole('link', { name: 'Scripts', exact: true }).click()
+      await expect(page.getByTestId('scripts-test-heading')).toBeInViewport()
+
+      await page.getByRole('link', { name: 'Home' }).click()
+      await expect(page.getByRole('link', { name: 'Posts' })).toBeVisible()
+    }
+
+    await page.getByRole('link', { name: 'Scripts', exact: true }).click()
+    await expect(page.getByTestId('scripts-test-heading')).toBeInViewport()
+
+    const finalCount = await page.evaluate(() => {
+      return document.querySelectorAll('script[src="script.js"]').length
+    })
+    expect(finalCount).toBe(1)
+    expect(await page.evaluate('window.SCRIPT_1')).toBe(true)
+  })
+
+  test('should not create duplicate inline scripts', async ({ page }) => {
+    await page.goto('/inline-scripts')
+
+    await expect(
+      page.getByTestId('inline-scripts-test-heading'),
+    ).toBeInViewport()
+
+    const script1Count = await page.evaluate(() => {
+      const scripts = Array.from(document.querySelectorAll('script:not([src])'))
+      return scripts.filter(
+        (script) =>
+          script.textContent &&
+          script.textContent.includes('window.INLINE_SCRIPT_1 = true'),
+      ).length
+    })
+
+    const script2Count = await page.evaluate(() => {
+      const scripts = Array.from(document.querySelectorAll('script:not([src])'))
+      return scripts.filter(
+        (script) =>
+          script.textContent &&
+          script.textContent.includes('window.INLINE_SCRIPT_2 = "test"'),
+      ).length
+    })
+
+    expect(script1Count).toBe(1)
+    expect(script2Count).toBe(1)
+    expect(await page.evaluate('window.INLINE_SCRIPT_1')).toBe(true)
+    expect(await page.evaluate('window.INLINE_SCRIPT_2')).toBe('test')
+  })
+
+  test('should not create duplicate inline scripts during client-side navigation', async ({
+    page,
+  }) => {
+    await page.goto('/')
+
+    await page.getByRole('link', { name: 'Inline Scripts' }).click()
+    await expect(
+      page.getByTestId('inline-scripts-test-heading'),
+    ).toBeInViewport()
+
+    const firstNavScript1Count = await page.evaluate(() => {
+      const scripts = Array.from(document.querySelectorAll('script:not([src])'))
+      return scripts.filter(
+        (script) =>
+          script.textContent &&
+          script.textContent.includes('window.INLINE_SCRIPT_1 = true'),
+      ).length
+    })
+    expect(firstNavScript1Count).toBe(1)
+
+    await page.getByRole('link', { name: 'Home' }).click()
+    await expect(page.getByRole('link', { name: 'Posts' })).toBeVisible()
+
+    await page.getByRole('link', { name: 'Inline Scripts' }).click()
+    await expect(
+      page.getByTestId('inline-scripts-test-heading'),
+    ).toBeInViewport()
+
+    const secondNavScript1Count = await page.evaluate(() => {
+      const scripts = Array.from(document.querySelectorAll('script:not([src])'))
+      return scripts.filter(
+        (script) =>
+          script.textContent &&
+          script.textContent.includes('window.INLINE_SCRIPT_1 = true'),
+      ).length
+    })
+    expect(secondNavScript1Count).toBe(1)
+
+    expect(await page.evaluate('window.INLINE_SCRIPT_1')).toBe(true)
+    expect(await page.evaluate('window.INLINE_SCRIPT_2')).toBe('test')
+  })
+})
diff --git a/packages/react-router/src/Asset.tsx b/packages/react-router/src/Asset.tsx
index 218663e24f2..266261d2e36 100644
--- a/packages/react-router/src/Asset.tsx
+++ b/packages/react-router/src/Asset.tsx
@@ -1,4 +1,5 @@
 import * as React from 'react'
+import { useRouter } from './useRouter'
 import type { RouterManagedTag } from '@tanstack/router-core'
 
 interface ScriptAttrs {
@@ -44,8 +45,26 @@ function Script({
   attrs?: ScriptAttrs
   children?: string
 }) {
+  const router = useRouter()
+
   React.useEffect(() => {
     if (attrs?.src) {
+      const normSrc = (() => {
+        try {
+          const base = document.baseURI || window.location.href
+          return new URL(attrs.src, base).href
+        } catch {
+          return attrs.src
+        }
+      })()
+      const existingScript = Array.from(
+        document.querySelectorAll('script[src]'),
+      ).find((el) => (el as HTMLScriptElement).src === normSrc)
+
+      if (existingScript) {
+        return
+      }
+
       const script = document.createElement('script')
 
       for (const [key, value] of Object.entries(attrs)) {
@@ -71,6 +90,27 @@ function Script({
     }
 
     if (typeof children === 'string') {
+      const typeAttr =
+        typeof attrs?.type === 'string' ? attrs.type : 'text/javascript'
+      const nonceAttr =
+        typeof attrs?.nonce === 'string' ? attrs.nonce : undefined
+      const existingScript = Array.from(
+        document.querySelectorAll('script:not([src])'),
+      ).find((el) => {
+        if (!(el instanceof HTMLScriptElement)) return false
+        const sType = el.getAttribute('type') ?? 'text/javascript'
+        const sNonce = el.getAttribute('nonce') ?? undefined
+        return (
+          el.textContent === children &&
+          sType === typeAttr &&
+          sNonce === nonceAttr
+        )
+      })
+
+      if (existingScript) {
+        return
+      }
+
       const script = document.createElement('script')
       script.textContent = children
 
@@ -101,6 +141,10 @@ function Script({
     return undefined
   }, [attrs, children])
 
+  if (!router.isServer) {
+    return null
+  }
+
   if (attrs?.src && typeof attrs.src === 'string') {
     return <script {...attrs} suppressHydrationWarning />
   }
diff --git a/packages/solid-router/src/Asset.tsx b/packages/solid-router/src/Asset.tsx
index 62e1b8468e9..d7bc725debd 100644
--- a/packages/solid-router/src/Asset.tsx
+++ b/packages/solid-router/src/Asset.tsx
@@ -1,5 +1,6 @@
 import { Meta, Style, Title } from '@solidjs/meta'
 import { onCleanup, onMount } from 'solid-js'
+import { useRouter } from './useRouter'
 import type { RouterManagedTag } from '@tanstack/router-core'
 import type { JSX } from 'solid-js'
 
@@ -36,8 +37,26 @@ function Script({
   attrs?: ScriptAttrs
   children?: string
 }): JSX.Element | null {
+  const router = useRouter()
+
   onMount(() => {
     if (attrs?.src) {
+      const normSrc = (() => {
+        try {
+          const base = document.baseURI || window.location.href
+          return new URL(attrs.src, base).href
+        } catch {
+          return attrs.src
+        }
+      })()
+      const existingScript = Array.from(
+        document.querySelectorAll('script[src]'),
+      ).find((el) => (el as HTMLScriptElement).src === normSrc)
+
+      if (existingScript) {
+        return
+      }
+
       const script = document.createElement('script')
 
       for (const [key, value] of Object.entries(attrs)) {
@@ -56,7 +75,30 @@ function Script({
           script.parentNode.removeChild(script)
         }
       })
-    } else if (typeof children === 'string') {
+    }
+
+    if (typeof children === 'string') {
+      const typeAttr =
+        typeof attrs?.type === 'string' ? attrs.type : 'text/javascript'
+      const nonceAttr =
+        typeof attrs?.nonce === 'string' ? attrs.nonce : undefined
+      const existingScript = Array.from(
+        document.querySelectorAll('script:not([src])'),
+      ).find((el) => {
+        if (!(el instanceof HTMLScriptElement)) return false
+        const sType = el.getAttribute('type') ?? 'text/javascript'
+        const sNonce = el.getAttribute('nonce') ?? undefined
+        return (
+          el.textContent === children &&
+          sType === typeAttr &&
+          sNonce === nonceAttr
+        )
+      })
+
+      if (existingScript) {
+        return
+      }
+
       const script = document.createElement('script')
       script.textContent = children
 
@@ -81,6 +123,10 @@ function Script({
     }
   })
 
+  if (router && !router.isServer) {
+    return null
+  }
+
   if (attrs?.src && typeof attrs.src === 'string') {
     return <script {...attrs} />
   }