diff --git a/.changeset/export-setup-ts-runtime.md b/.changeset/export-setup-ts-runtime.md
new file mode 100644
index 000000000000..4ea16bb68021
--- /dev/null
+++ b/.changeset/export-setup-ts-runtime.md
@@ -0,0 +1,13 @@
+---
+'@modern-js/app-tools': patch
+---
+
+feat(app-tools): export `setupTsRuntime` and `resolveTsRuntimeRegisterMode` from the public entry
+
+The server TypeScript runtime setup app-tools' own dev/build commands use
+(ts-node when the project depends on it, Node.js native TypeScript as the
+fallback, plus tsconfig-paths/alias registration) is now part of the public
+API, so frameworks composing app-tools in-process (running their own command
+actions instead of app-tools') can register the same runtime without keeping
+a private copy of the logic. Also exports the `TsRuntimeRegisterMode` and
+`TsRuntimeSetupOptions` types.
diff --git a/packages/solutions/app-tools/src/index.ts b/packages/solutions/app-tools/src/index.ts
index dc4fd16a77a8..559cd8db976c 100644
--- a/packages/solutions/app-tools/src/index.ts
+++ b/packages/solutions/app-tools/src/index.ts
@@ -172,6 +172,12 @@ export { dev } from './commands/dev';
 export { serve } from './commands/serve';
 export type { DevOptions } from './utils/types';
 export { generateWatchFiles } from './utils/generateWatchFiles';
+export {
+  resolveTsRuntimeRegisterMode,
+  setupTsRuntime,
+  type TsRuntimeRegisterMode,
+  type TsRuntimeSetupOptions,
+} from './utils/register';
 export {
   resolveModernRsbuildConfig,
   type ResolveModernRsbuildConfigOptions,
diff --git a/packages/solutions/app-tools/src/utils/register.ts b/packages/solutions/app-tools/src/utils/register.ts
index 40c8402d7433..10bbcd969906 100644
--- a/packages/solutions/app-tools/src/utils/register.ts
+++ b/packages/solutions/app-tools/src/utils/register.ts
@@ -11,9 +11,9 @@ import {
 } from '@modern-js/utils';
 import type { ConfigChain } from '@rsbuild/core';
 
-type TsRuntimeRegisterMode = 'ts-node' | 'node-loader' | 'unsupported';
+export type TsRuntimeRegisterMode = 'ts-node' | 'node-loader' | 'unsupported';
 
-interface TsRuntimeSetupOptions {
+export interface TsRuntimeSetupOptions {
   moduleType?: string;
   /**
    * User-configured `server.tsconfigPath`. Forwarded into the shared