diff --git a/packages/cli/src/Cli.ts b/packages/cli/src/Cli.ts
index 5fcd15e..9252c36 100644
--- a/packages/cli/src/Cli.ts
+++ b/packages/cli/src/Cli.ts
@@ -28,7 +28,7 @@ class Cli {
     // 0. load plugin
     this.plugins = await this.resolvePlugins()
     // 1. load project config and validate
-    await this.ConfigManager.loadUserConfig()
+    await this.ConfigManager.$loadUserConfig()
     // 2. apply plugins
     this.plugins.forEach(({ id, apply }) => {
       // some skip plugins ??
@@ -36,7 +36,7 @@ class Cli {
     })
     // 3. valid plugin config
     // should after plugins apply because plugin can register config validator
-    this.ConfigManager.validatePluginConfig()
+    this.ConfigManager.$validatePluginConfig()
   }
 
   async resolvePlugins(): Promise<Plugin[]> {
diff --git a/packages/cli/src/PluginAPI.ts b/packages/cli/src/PluginAPI.ts
index c7a490f..3c1a6f2 100644
--- a/packages/cli/src/PluginAPI.ts
+++ b/packages/cli/src/PluginAPI.ts
@@ -3,6 +3,7 @@ import type { IConfigManager } from './manager/ConfigManager'
 import type { IEnvManager } from './manager/EnvManager'
 import type { IPathManager } from './manager/PathManager'
 import type { CliInstance } from './Cli'
+import type { ObjectSchema } from 'joi'
 
 class PluginAPI {
   id: string
@@ -43,6 +44,13 @@ class PluginAPI {
       ops
     }
   }
+
+  registerConfigValidator<T = Record<string, any>>(
+    pluginConfigName: string,
+    schema: ObjectSchema<T>
+  ): void {
+    this.ConfigManager.$addConfigValidator<T>(pluginConfigName, schema)
+  }
 }
 
 export type IPluginAPI = InstanceType<typeof PluginAPI>
diff --git a/packages/cli/src/manager/ConfigManager.ts b/packages/cli/src/manager/ConfigManager.ts
index aa47790..fcf035e 100644
--- a/packages/cli/src/manager/ConfigManager.ts
+++ b/packages/cli/src/manager/ConfigManager.ts
@@ -9,14 +9,15 @@ class ConfigManager {
   private PathManager: IPathManager
 
   private finalConfig: ProjectConfig = {}
+  private userConfigIsLoaded = false
 
   private configValidator: ConfigValidator = {}
 
-  registerConfigValidator<T = Record<string, any>>(
+  $addConfigValidator<T = Record<string, any>>(
     name: string,
-    validator: ObjectSchema<T>
+    schema: ObjectSchema<T>
   ): void {
-    this.configValidator[name] = validator
+    this.configValidator[name] = schema
   }
 
   get projectConfig(): ProjectConfig {
@@ -27,7 +28,8 @@ class ConfigManager {
     this.PathManager = pathManager
   }
 
-  async loadUserConfig(): Promise<void> {
+  async $loadUserConfig(): Promise<void> {
+    if (this.userConfigIsLoaded) return
     // 1. load userConfig
     let userConfig: ProjectConfig
     const [err, configContent] = await loadModule<ProjectConfig>(
@@ -49,9 +51,10 @@ class ConfigManager {
     })
 
     this.finalConfig = userConfig
+    this.userConfigIsLoaded = true
   }
 
-  validatePluginConfig(): void {
+  $validatePluginConfig(): void {
     // valid plugin config
     const { pluginOps = null } = this.projectConfig
     if (!pluginOps) return
diff --git a/packages/cli/src/manager/EnvManager.ts b/packages/cli/src/manager/EnvManager.ts
index b10172c..f6afcfb 100644
--- a/packages/cli/src/manager/EnvManager.ts
+++ b/packages/cli/src/manager/EnvManager.ts
@@ -2,6 +2,7 @@ import { createEnvName } from '../utils'
 import { IPathManager } from './PathManager'
 
 class EnvManager {
+  // path for load env file ??
   private PathManager: IPathManager
 
   constructor(pathManager: IPathManager) {