diff --git a/lib/src/commands/config_command.dart b/lib/src/commands/config_command.dart
index 8dcc076..bb045fc 100644
--- a/lib/src/commands/config_command.dart
+++ b/lib/src/commands/config_command.dart
@@ -23,6 +23,22 @@ class ConfigCommand extends Command<int> {
         'conventional',
         help: '''
 Format the commit message according to the Conventional Commits specification.''',
+      )
+      ..addOption(
+        'proxy',
+        help: 'Set proxy server for OpenAI API.',
+      )
+      ..addOption(
+        'model',
+        help: 'Set model name for OpenAI API.',
+      )
+      ..addOption(
+        'timeout',
+        help: 'Set timeout in milliseconds.',
+      )
+      ..addOption(
+        'max-length',
+        help: 'Set max length of commit message.',
       );
   }
 
@@ -38,10 +54,17 @@ Format the commit message according to the Conventional Commits specification.''
   Future<int> run() async {
     final arguments = argResults?.arguments ?? [];
 
+    // check `arguments` is empty
+    // show `usage` and return
+
     if (arguments.isEmpty) {
-      usageException('Missing argument for "config".');
+      _logger.info(usage);
+      return ExitCode.software.code;
     }
 
+    // get `key` value from args
+    // check value is start with "sk-" and store
+
     final key = argResults?['key'];
 
     if (key != null) {
@@ -54,6 +77,9 @@ Format the commit message according to the Conventional Commits specification.''
       }
     }
 
+    // get `locale` value from args
+    // check valid language code and store
+
     final locale = argResults?['locale'];
 
     if (locale != null) {
@@ -68,6 +94,9 @@ Format the commit message according to the Conventional Commits specification.''
       }
     }
 
+    // get `count` value from args
+    // check value is greater than 0 and less than or equal to 5 and store
+
     final count = argResults?['count'];
 
     if (count != null) {
@@ -91,6 +120,8 @@ Format the commit message according to the Conventional Commits specification.''
       }
     }
 
+    // get `conventional` value from args and store
+
     if (argResults?.wasParsed('conventional') ?? false) {
       final conventional = argResults?['conventional'];
 
@@ -101,6 +132,75 @@ Format the commit message according to the Conventional Commits specification.''
       }
     }
 
+    // get `proxy` value from args
+    // check valid URL and store
+
+    final proxy = argResults?['proxy'];
+
+    if (proxy != null) {
+      if (Uri.tryParse('$proxy')?.isAbsolute ?? false) {
+        _logger.success('Setting "proxy" to "$proxy".');
+        await setProxy('$proxy');
+      } else {
+        _logger.err('Proxy must be valid URL.');
+        return ExitCode.software.code;
+      }
+    }
+
+    // get `model` value from args
+    // check isNotEmpty and store
+
+    final model = argResults?['model'];
+
+    if (model != null) {
+      if (model is String && model.isNotEmpty) {
+        _logger.success('Setting "model" to "$model".');
+        await setModel(model);
+      } else {
+        _logger.err('Model must be a string.');
+        return ExitCode.software.code;
+      }
+    }
+
+    // get `timeout` value from args
+    // check greater than 500ms and store
+
+    final timeout = argResults?['timeout'];
+
+    if (timeout != null) {
+      if (int.tryParse('$timeout') != null) {
+        final value = int.parse('$timeout');
+        if (value > 500) {
+          _logger.success('Setting "timeout" to "$value".');
+          await setProxy('$value');
+        } else {
+          _logger.err('Timeout must be an greater than 500ms.');
+          return ExitCode.software.code;
+        }
+      }
+    }
+
+    // get `max-length` value from args
+    // check greater than 20 and store
+
+    final maxLength = argResults?['max-length'];
+
+    if (maxLength != null) {
+      if (int.tryParse('$maxLength') != null) {
+        final value = int.parse('$maxLength');
+        if (value > 20) {
+          _logger.success('Setting "max-length" to "$value".');
+          await setProxy('$value');
+        } else {
+          _logger.err('Max length must be an greater than 20.');
+          return ExitCode.software.code;
+        }
+      } else {
+        _logger.err('Max length must be an integer.');
+        return ExitCode.software.code;
+      }
+    }
+
     return ExitCode.software.code;
   }
 }
diff --git a/lib/src/utils/config.dart b/lib/src/utils/config.dart
index e4f093f..4182554 100644
--- a/lib/src/utils/config.dart
+++ b/lib/src/utils/config.dart
@@ -1,24 +1,44 @@
 import 'package:hive/hive.dart';
 
+// store data in hive box
 Future<void> setData(String key, dynamic value) async {
   final box = await Hive.openBox<dynamic>('ai_commit_config');
   await box.put(key, value);
 }
 
+// store openai api key
 Future<void> setKey(String value) async {
   await setData('api_key', value);
 }
 
+// store locale language
 Future<void> setLocale(String value) async {
   await setData('locale', value);
 }
 
+// store generate commit message count
 Future<void> setCount(int value) async {
   await setData('generate_count', value);
 }
 
+// store is_conventional value
 Future<void> setConventional({required bool value}) async {
-  await setData('generate_conventional_commits', value);
+  await setData('is_conventional', value);
+}
+
+// store proxy server address
+Future<void> setProxy(String value) async {
+  await setData('proxy', value);
+}
+
+// store model name
+Future<void> setModel(String value) async {
+  await setData('model', value);
+}
+
+// store timeout value
+Future<void> setTimeout(int value) async {
+  await setData('timeout', value);
 }
 
 void getConfig() {
diff --git a/pubspec.yaml b/pubspec.yaml
index af7b47d..9c5a94f 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: ai_commit
-description: A Very Good Project created by Very Good CLI.
+description: Dart CLI for generate commit messages with OpenAI
 version: 0.0.1
 publish_to: none