diff --git a/packages/cli-shared/src/BabelRegister/index.ts b/packages/cli-shared/src/BabelRegister/index.ts
index d385766..07eb8e1 100644
--- a/packages/cli-shared/src/BabelRegister/index.ts
+++ b/packages/cli-shared/src/BabelRegister/index.ts
@@ -3,7 +3,7 @@ import { createDebug, lodash, winPath } from '../'
 const debug = createDebug('xus:shared:BabelRegister')
 
 export class BabelRegister {
-  only: Record<string, string[]> = {}
+  private only: Record<string, string[]> = {}
 
   setOnlyMap({ key, value }: { key: string; value: string[] }) {
     debug(`set ${key} of only map:`)
@@ -12,7 +12,7 @@ export class BabelRegister {
     this.register()
   }
 
-  register() {
+  private register() {
     const only = lodash.uniq(
       Object.keys(this.only)
         .reduce<string[]>((memo, key) => {
@@ -38,3 +38,5 @@ export class BabelRegister {
     })
   }
 }
+
+export type IBabelRegister = InstanceType<typeof BabelRegister>
diff --git a/packages/cli-shared/src/file/getFileMeta.ts b/packages/cli-shared/src/file/getFileMeta.ts
index 5641d93..20f8930 100644
--- a/packages/cli-shared/src/file/getFileMeta.ts
+++ b/packages/cli-shared/src/file/getFileMeta.ts
@@ -5,14 +5,23 @@ import { winPath } from '../winPath'
 interface IGetFileMetaOps {
   base: string
   filenameWithoutExt: string
+  type: 'js' | 'lib' | 'css'
 }
 
 const extsMap = {
-  js: ['.ts', '.js']
+  js: ['.ts', '.js'],
+  lib: ['.js', 'jsx', '.ts', '.tsx', '.vue'],
+  css: ['.css', '.scss', '.sass', '.less']
 }
 
-export const getFileMeta = (ops: IGetFileMetaOps) => {
-  const exts = extsMap.js
+export const getFileMeta = (
+  ops: IGetFileMetaOps = {
+    base: process.cwd(),
+    filenameWithoutExt: '',
+    type: 'js'
+  }
+) => {
+  const exts = extsMap[ops.type]
   for (const ext of exts) {
     const filename = `${ops.filenameWithoutExt}${ext}`
     const path = winPath(join(ops.base, filename))
diff --git a/packages/cli-shared/src/index.ts b/packages/cli-shared/src/index.ts
index ab21b29..d3caf07 100644
--- a/packages/cli-shared/src/index.ts
+++ b/packages/cli-shared/src/index.ts
@@ -18,7 +18,7 @@ export { createEnvNameWithXusPrefix } from './env'
 export * from './file'
 export { loadModule } from './loadModule'
 export * from './pkg'
-export { BabelRegister } from './BabelRegister'
+export { BabelRegister, IBabelRegister } from './BabelRegister'
 
 // types export
 export type {
diff --git a/packages/cli/src/exports/pluginAPI.ts b/packages/cli/src/exports/pluginAPI.ts
index c2f0bdb..c2a5c3d 100644
--- a/packages/cli/src/exports/pluginAPI.ts
+++ b/packages/cli/src/exports/pluginAPI.ts
@@ -7,6 +7,7 @@ import type {
   IArgs,
   IRawArgs
 } from '@xus/core'
+import type { IBabelRegister } from '@xus/cli-shared'
 import type { IConfig } from './create'
 import { IBuildLibMethods } from '@xus/plugin-build-lib'
 import { IBundlerRollupMethods } from '@xus/plugin-bundler-rollup'
@@ -14,6 +15,8 @@ import { IBundlerRollupMethods } from '@xus/plugin-bundler-rollup'
 type noopFn = () => any
 
 export interface IPluginAPI extends IPluginAPIBase {
+  // service api
+  BabelRegister: IBabelRegister
   // service lifycycle
   onPluginReady: noopFn
   onRunCmd: noopFn
diff --git a/packages/core/src/cli/Service.ts b/packages/core/src/cli/Service.ts
index 3eec6a8..f9b67a5 100644
--- a/packages/core/src/cli/Service.ts
+++ b/packages/core/src/cli/Service.ts
@@ -1,7 +1,8 @@
 // types
 import type { ICliServerOps, ICommand, IArgs, IRawArgs } from '../types'
-import { Logger } from '@xus/cli-shared'
+import { Logger, BabelRegister } from '@xus/cli-shared'
 import { CliServiceStage, HookTypes } from '../enums'
+import { CONFIG_FILES } from '../constants'
 import {
   ConfigManager,
   EnvManager,
@@ -28,6 +29,8 @@ export class CliService {
   PluginManager
   HookManager
 
+  BabelRegister
+
   protected setStage(nextStage: CliServiceStage) {
     this.stage = nextStage
   }
@@ -38,6 +41,7 @@ export class CliService {
     logger.debug(ops)
     // 1. init manager
     this.setStage(CliServiceStage.initManager)
+    this.BabelRegister = new BabelRegister()
     this.PathManager = new PathManager()
     this.EnvManager = new EnvManager({
       service: this,
@@ -64,6 +68,10 @@ export class CliService {
     logger.debug(this.HookManager)
 
     // 2. init config (without plugin config)
+    this.BabelRegister.setOnlyMap({
+      key: 'xus:config',
+      value: CONFIG_FILES
+    })
     this.setStage(CliServiceStage.initUserConfig)
     this.ConfigManager.initUserConfig()
 
@@ -140,6 +148,10 @@ export class CliService {
 
     return new Proxy(api, {
       get: (target, key: string) => {
+        // proxy to service
+        if (['BabelRegister'].includes(key)) {
+          return (this as any)[key]
+        }
         // registerMethods
         if (this.pluginMethods[key]) {
           return this.pluginMethods[key].bind(api)
diff --git a/packages/core/src/constants.ts b/packages/core/src/constants.ts
new file mode 100644
index 0000000..59279fa
--- /dev/null
+++ b/packages/core/src/constants.ts
@@ -0,0 +1,2 @@
+export const CONFIG_FILES = ['xus.config.js', 'xus.config.ts']
+export const CONFIG_FILENAME = 'xus.config'
diff --git a/packages/core/src/manager/PathManager.ts b/packages/core/src/manager/PathManager.ts
index 33ea72b..4815d07 100644
--- a/packages/core/src/manager/PathManager.ts
+++ b/packages/core/src/manager/PathManager.ts
@@ -1,6 +1,7 @@
 import { join, relative } from 'path'
 import { statSync, readdirSync } from 'fs'
 import { getFileMeta, isLernaPkg } from '@xus/cli-shared'
+import { CONFIG_FILENAME } from '../constants'
 
 export class PathManager {
   get cwd(): string {
@@ -14,7 +15,8 @@ export class PathManager {
   get userConfigPath() {
     const fileMeta = getFileMeta({
       base: this.cwd,
-      filenameWithoutExt: 'xus.config'
+      filenameWithoutExt: CONFIG_FILENAME,
+      type: 'js'
     })
     return fileMeta && fileMeta.path
   }