diff --git a/src/components/application-starter/prompt-shared.ts b/src/components/application-starter/prompt-shared.ts
index fdd641616..15979dfc3 100644
--- a/src/components/application-starter/prompt-shared.ts
+++ b/src/components/application-starter/prompt-shared.ts
@@ -4,6 +4,7 @@ import { composeApplicationStarterInput } from '~/utils/partners'
 import {
   type ApplicationStarterAnalysis,
   sanitizeStarterPrompt,
+  isNextJsMigrationInput,
   type ApplicationStarterRequest,
   type ApplicationStarterResult,
 } from '~/utils/application-starter'
@@ -58,17 +59,8 @@ export type StarterPartnerButtonStyle = CSSProperties & {
   '--starter-partner-hover-border-color'?: string
 }
 
-const nextJsMigrationPattern =
-  /migrat(?:e|ing|ion).*(next(?:\.js)?)|(next(?:\.js)?).*(migrat(?:e|ing|ion))/i
-const remixMigrationPattern =
-  /migrat(?:e|ing|ion).*(remix|react[\s-]?router)|(remix|react[\s-]?router).*(migrat(?:e|ing|ion))/i
 const migrationRepositoryUrlPattern = /^(https?:\/\/\S+|git@\S+|ssh:\/\/\S+)$/i
 
-export const STARTER_NEXTJS_MIGRATION_GUIDE_URL =
-  'https://tanstack.com/start/latest/docs/framework/react/migrate-from-next-js'
-export const STARTER_REMIX_MIGRATION_GUIDE_URL =
-  'https://tanstack.com/router/latest/docs/guide/how-to/migrate-from-react-router'
-
 export const starterPinnedLibraryIds = [
   'start',
   'router',
@@ -153,26 +145,6 @@ export function isPinnedStarterLibrary(libraryId: LibraryId) {
   )
 }
 
-export function isNextJsMigrationInput(input: string) {
-  return nextJsMigrationPattern.test(input)
-}
-
-export function isRemixMigrationInput(input: string) {
-  return remixMigrationPattern.test(input)
-}
-
-export function getStarterMigrationGuideUrl(input: string) {
-  if (isNextJsMigrationInput(input)) {
-    return STARTER_NEXTJS_MIGRATION_GUIDE_URL
-  }
-
-  if (isRemixMigrationInput(input)) {
-    return STARTER_REMIX_MIGRATION_GUIDE_URL
-  }
-
-  return null
-}
-
 export function normalizeMigrationRepositoryUrl(value: string) {
   return value.trim()
 }
@@ -373,3 +345,11 @@ export class ApplicationStarterError extends Error {
     this.retryAfter = options?.retryAfter
   }
 }
+
+export {
+  isNextJsMigrationInput,
+  isRemixMigrationInput,
+  getStarterMigrationGuideUrl,
+  STARTER_NEXTJS_MIGRATION_GUIDE_URL,
+  STARTER_REMIX_MIGRATION_GUIDE_URL,
+} from '~/utils/application-starter'
diff --git a/src/utils/application-starter.ts b/src/utils/application-starter.ts
index c048fed77..8791335cd 100644
--- a/src/utils/application-starter.ts
+++ b/src/utils/application-starter.ts
@@ -1278,6 +1278,7 @@ function buildPrompt({
 
   if (resultType === 'migration') {
     const source = detectMigrationSource(userBrief) ?? 'the existing app'
+    const migrationGuideUrl = getStarterMigrationGuideUrl(userBrief)
     const migrationRepositoryInstructions =
       getMigrationRepositoryInstructionLines(input)
 
@@ -1296,6 +1297,12 @@ function buildPrompt({
       ...getStarterConstraintInstructionLines(input),
       ...migrationRepositoryInstructions,
       '',
+      ...(migrationGuideUrl
+        ? [
+            `Fetch ${migrationGuideUrl} for the applicable routing and framework migration concepts. Keep the fresh TanStack project and the migration strategy below authoritative; do not apply in-place setup steps from the guide.`,
+            '',
+          ]
+        : []),
       'Migration strategy:',
       '1. Inventory routes, layouts, auth, data loading, forms, and environment variables in the existing app.',
       '2. Recreate the destination structure in the fresh TanStack project first.',
@@ -1475,3 +1482,33 @@ export function buildDownloadUrl(recipe: ApplicationStarterRecipe) {
 
   return `/api/application-starter/download?${params.toString()}`
 }
+
+const nextJsMigrationPattern =
+  /migrat(?:e|ing|ion)[\s\S]*\bnext(?:\.?js|\s+(?:app|application|project))\b|\bnext(?:\.?js|\s+(?:app|application|project))\b[\s\S]*migrat(?:e|ing|ion)/i
+const remixMigrationPattern =
+  /migrat(?:e|ing|ion)[\s\S]*\b(remix|react[\s-]?router)\b|\b(remix|react[\s-]?router)\b[\s\S]*migrat(?:e|ing|ion)/i
+
+export const STARTER_NEXTJS_MIGRATION_GUIDE_URL =
+  'https://tanstack.com/start/latest/docs/framework/react/migrate-from-next-js'
+export const STARTER_REMIX_MIGRATION_GUIDE_URL =
+  'https://tanstack.com/router/latest/docs/how-to/migrate-from-react-router'
+
+export function isNextJsMigrationInput(input: string) {
+  return nextJsMigrationPattern.test(input)
+}
+
+export function isRemixMigrationInput(input: string) {
+  return remixMigrationPattern.test(input)
+}
+
+export function getStarterMigrationGuideUrl(input: string) {
+  if (isNextJsMigrationInput(input)) {
+    return STARTER_NEXTJS_MIGRATION_GUIDE_URL
+  }
+
+  if (isRemixMigrationInput(input)) {
+    return STARTER_REMIX_MIGRATION_GUIDE_URL
+  }
+
+  return null
+}
diff --git a/tests/application-starter-partners.test.ts b/tests/application-starter-partners.test.ts
index 8792d31ee..5bd61c509 100644
--- a/tests/application-starter-partners.test.ts
+++ b/tests/application-starter-partners.test.ts
@@ -14,6 +14,7 @@ require.extensions['.svg'] = loadAsset
 
 const {
   resolveApplicationStarterDeterministically,
+  getStarterMigrationGuideUrl,
 }: typeof import('../src/utils/application-starter') = require('../src/utils/application-starter')
 const {
   composeApplicationStarterInput,
@@ -534,3 +535,54 @@ test('Cloudflare, Vercel, and Render rotate with the gold Start hosting partners
     assert.ok(partnerPositions.size > 1)
   }
 })
+
+test('migration prompts include the matching migration guide', async () => {
+  for (const [source, guide] of [
+    [
+      'Next.js',
+      'https://tanstack.com/start/latest/docs/framework/react/migrate-from-next-js',
+    ],
+    [
+      'Remix',
+      'https://tanstack.com/router/latest/docs/how-to/migrate-from-react-router',
+    ],
+    [
+      'React Router',
+      'https://tanstack.com/router/latest/docs/how-to/migrate-from-react-router',
+    ],
+  ]) {
+    const result = await resolveApplicationStarterDeterministically({
+      context: 'home',
+      input: `Migrate my ${source} app to TanStack Start.`,
+    })
+    assert.ok(result.prompt.includes(`Fetch ${guide}`))
+    assert.ok(result.prompt.includes('do not apply in-place setup steps'))
+  }
+  const result = await resolveApplicationStarterDeterministically({
+    context: 'home',
+    input: 'Build a dashboard.',
+  })
+  assert.equal(result.prompt.includes('Fetch https://tanstack.com/'), false)
+})
+
+test('migration guides distinguish framework names from timing and accept multiline briefs', () => {
+  assert.equal(
+    getStarterMigrationGuideUrl('Migrate my Remix app next week'),
+    'https://tanstack.com/router/latest/docs/how-to/migrate-from-react-router',
+  )
+  assert.equal(getStarterMigrationGuideUrl('Migrate my app next week'), null)
+  for (const input of [
+    'Migrate my app\nfrom Next.js to TanStack Start',
+    'Next.js app\nneeds migration',
+    'Migrate my Next app to TanStack Start',
+  ]) {
+    assert.equal(
+      getStarterMigrationGuideUrl(input),
+      'https://tanstack.com/start/latest/docs/framework/react/migrate-from-next-js',
+    )
+  }
+  assert.equal(
+    getStarterMigrationGuideUrl('Migrate my app\nfrom Remix to TanStack Start'),
+    'https://tanstack.com/router/latest/docs/how-to/migrate-from-react-router',
+  )
+})