diff --git a/rollup.config.ts b/rollup.config.ts
index 29516baf..6bf7ff1b 100644
--- a/rollup.config.ts
+++ b/rollup.config.ts
@@ -91,10 +91,7 @@ const clientTypes: RollupOptions = {
   },
   external: typesExternal,
   plugins: [
-    dts({
-      respectExternal: true,
-      tsconfig: 'tsconfig.json'
-    }),
+    dts({ respectExternal: true }),
     {
       name: 'cleanup',
       async closeBundle() {
diff --git a/src/node/config.ts b/src/node/config.ts
index ffffa5ab..5f1698fe 100644
--- a/src/node/config.ts
+++ b/src/node/config.ts
@@ -10,14 +10,9 @@ import {
   type ConfigEnv
 } from 'vite'
 import { DEFAULT_THEME_PATH } from './alias'
+import type { DefaultTheme } from './defaultTheme'
 import { resolvePages } from './plugins/dynamicRoutesPlugin'
-import {
-  APPEARANCE_KEY,
-  slash,
-  type DefaultTheme,
-  type HeadConfig,
-  type SiteData
-} from './shared'
+import { APPEARANCE_KEY, slash, type HeadConfig, type SiteData } from './shared'
 import type { RawConfigExports, SiteConfig, UserConfig } from './siteConfig'
 
 export { resolvePages } from './plugins/dynamicRoutesPlugin'
diff --git a/src/node/defaultTheme.ts b/src/node/defaultTheme.ts
new file mode 100644
index 00000000..21ca830e
--- /dev/null
+++ b/src/node/defaultTheme.ts
@@ -0,0 +1,45 @@
+// this file contains node-only types of default theme
+// (functions starting with _ are node-only)
+
+import type { MarkdownItAsync } from 'markdown-it-async'
+import type { DefaultTheme } from '../../types/default-theme'
+import type { PageSplitSection } from '../../types/local-search'
+import type { Awaitable, MarkdownEnv } from './shared'
+
+declare module '../../types/default-theme.js' {
+  namespace DefaultTheme {
+    interface LocalSearchOptions {
+      /**
+       * Allows transformation of content before indexing (node only)
+       * Return empty string to skip indexing
+       */
+      _render?: (
+        src: string,
+        env: MarkdownEnv,
+        md: MarkdownItAsync
+      ) => Awaitable<string>
+    }
+
+    interface MiniSearchOptions {
+      /**
+       * Overrides the default regex based page splitter.
+       * Supports async generator, making it possible to run in true parallel
+       * (when used along with `node:child_process` or `worker_threads`)
+       * ---
+       * This should be especially useful for scalability reasons.
+       * ---
+       * @param {string} path - absolute path to the markdown source file
+       * @param {string} html - document page rendered as html
+       */
+      _splitIntoSections?: (
+        path: string,
+        html: string
+      ) =>
+        | AsyncGenerator<PageSplitSection>
+        | Generator<PageSplitSection>
+        | Awaitable<PageSplitSection[]>
+    }
+  }
+}
+
+export type { DefaultTheme }
diff --git a/src/node/index.ts b/src/node/index.ts
index 90c0956a..63ee79f8 100644
--- a/src/node/index.ts
+++ b/src/node/index.ts
@@ -8,11 +8,7 @@ export { defineLoader, type LoaderModule } from './plugins/staticDataPlugin'
 export * from './postcss/isolateStyles'
 export * from './serve/serve'
 export * from './server'
+export type { DefaultTheme } from './defaultTheme'
 
 // shared types
-export type {
-  DefaultTheme,
-  HeadConfig,
-  Header,
-  SiteData
-} from '../../types/shared'
+export type { HeadConfig, Header, SiteData } from '../../types/shared'
diff --git a/src/node/plugins/localSearchPlugin.ts b/src/node/plugins/localSearchPlugin.ts
index 1456d4f8..bffe74e8 100644
--- a/src/node/plugins/localSearchPlugin.ts
+++ b/src/node/plugins/localSearchPlugin.ts
@@ -5,13 +5,9 @@ import path from 'node:path'
 import pMap from 'p-map'
 import type { Plugin, ViteDevServer } from 'vite'
 import type { SiteConfig } from '../config'
+import type { DefaultTheme } from '../defaultTheme'
 import { createMarkdownRenderer } from '../markdown/markdown'
-import {
-  getLocaleForPath,
-  slash,
-  type DefaultTheme,
-  type MarkdownEnv
-} from '../shared'
+import { getLocaleForPath, slash, type MarkdownEnv } from '../shared'
 import { processIncludes } from '../utils/processIncludes'
 
 const debug = _debug('vitepress:local-search')
diff --git a/types/default-theme.d.ts b/types/default-theme.d.ts
index c6767043..5a669c49 100644
--- a/types/default-theme.d.ts
+++ b/types/default-theme.d.ts
@@ -1,11 +1,8 @@
-import type { Options as MiniSearchOptions } from 'minisearch'
+import type { Options as _MiniSearchOptions } from 'minisearch'
 import type { ComputedRef, Ref, ShallowRef } from 'vue'
 import type { DocSearchProps } from './docsearch.js'
-import type {
-  LocalSearchTranslations,
-  PageSplitSection
-} from './local-search.js'
-import type { Awaitable, MarkdownEnv, PageData } from './shared.js'
+import type { LocalSearchTranslations } from './local-search.js'
+import type { PageData } from './shared.js'
 
 export namespace DefaultTheme {
   export interface Config {
@@ -412,42 +409,21 @@ export namespace DefaultTheme {
     translations?: LocalSearchTranslations
     locales?: Record<string, Partial<Omit<LocalSearchOptions, 'locales'>>>
 
-    miniSearch?: {
-      /**
-       * @see https://lucaong.github.io/minisearch/types/MiniSearch.Options.html
-       */
-      options?: Pick<
-        MiniSearchOptions,
-        'extractField' | 'tokenize' | 'processTerm'
-      >
-      /**
-       * @see https://lucaong.github.io/minisearch/types/MiniSearch.SearchOptions.html
-       */
-      searchOptions?: MiniSearchOptions['searchOptions']
-
-      /**
-       * Overrides the default regex based page splitter.
-       * Supports async generator, making it possible to run in true parallel
-       * (when used along with `node:child_process` or `worker_threads`)
-       * ---
-       * This should be especially useful for scalability reasons.
-       * ---
-       * @param {string} path - absolute path to the markdown source file
-       * @param {string} html - document page rendered as html
-       */
-      _splitIntoSections?: (
-        path: string,
-        html: string
-      ) =>
-        | AsyncGenerator<PageSplitSection>
-        | Generator<PageSplitSection>
-        | Awaitable<PageSplitSection[]>
-    }
-    /**
-     * Allows transformation of content before indexing (node only)
-     * Return empty string to skip indexing
-     */
-    _render?: (src: string, env: MarkdownEnv, md: any) => Awaitable<string>
+    miniSearch?: MiniSearchOptions
+  }
+
+  interface MiniSearchOptions {
+    /**
+     * @see https://lucaong.github.io/minisearch/types/MiniSearch.Options.html
+     */
+    options?: Pick<
+      _MiniSearchOptions,
+      'extractField' | 'tokenize' | 'processTerm'
+    >
+    /**
+     * @see https://lucaong.github.io/minisearch/types/MiniSearch.SearchOptions.html
+     */
+    searchOptions?: _MiniSearchOptions['searchOptions']
   }
 
   // algolia -------------------------------------------------------------------