diff --git a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/MiraiConsole.kt b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/MiraiConsole.kt
index 65fd1eda2..c3576ca47 100644
--- a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/MiraiConsole.kt
+++ b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/MiraiConsole.kt
@@ -34,7 +34,7 @@ import kotlin.coroutines.CoroutineContext
  *
  * @see INSTANCE
  */
-interface MiraiConsole {
+interface MiraiConsole : CoroutineScope {
     /**
      * Console 运行路径
      */
diff --git a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/command/CompositeCommand.kt b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/command/CompositeCommand.kt
index a4ef6361f..d797c9ae5 100644
--- a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/command/CompositeCommand.kt
+++ b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/command/CompositeCommand.kt
@@ -21,8 +21,8 @@ import kotlin.reflect.KClass
 
 
 /**
- * 功能最集中的Commend
- * 支持且只支持有sub的指令
+ * 功能最集中的 Commend
+ * 只支持有sub的指令
  * 例:
  *  /mute add
  *  /mute remove
@@ -40,9 +40,7 @@ abstract class CompositeCommand @JvmOverloads constructor(
     final override val description = description.trimIndent()
     final override val names: Array<out String> =
         names.map(String::trim).filterNot(String::isEmpty).map(String::toLowerCase).also { list ->
-            list.firstOrNull { !it.isValidSubName() }?.let {
-                error("Name is not valid: $it")
-            }
+            list.firstOrNull { !it.isValidSubName() }?.let { error("Name is not valid: $it") }
         }.toTypedArray()
 
     /**
@@ -72,9 +70,9 @@ abstract class CompositeCommand @JvmOverloads constructor(
     @Target(AnnotationTarget.VALUE_PARAMETER)
     annotation class Name(val name: String)
 
-    final override suspend fun onCommand(sender: CommandSender, args: Array<out Any>) {
-        matchSubCommand(args)?.parseAndExecute(sender, args) ?: kotlin.run {
-            defaultSubCommand.onCommand(sender, args)
+    final override suspend fun CommandSender.onCommand(args: Array<out Any>) {
+        matchSubCommand(args)?.parseAndExecute(this, args) ?: kotlin.run {
+            defaultSubCommand.onCommand(this, args)
         }
     }
 }
diff --git a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/command/description/CommandArgParserBuiltins.kt b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/command/description/CommandArgParserBuiltins.kt
index 49936f429..48a5c65ca 100644
--- a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/command/description/CommandArgParserBuiltins.kt
+++ b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/command/description/CommandArgParserBuiltins.kt
@@ -23,44 +23,44 @@ import net.mamoe.mirai.message.data.SingleMessage
 import net.mamoe.mirai.message.data.content
 
 
-object IntArgParser : CommandArgParser<Int>() {
+object IntArgParser : CommandArgParser<Int> {
     override fun parse(raw: String, sender: CommandSender): Int =
         raw.toIntOrNull() ?: illegalArgument("无法解析 $raw 为整数")
 }
 
-object LongArgParser : CommandArgParser<Long>() {
+object LongArgParser : CommandArgParser<Long> {
     override fun parse(raw: String, sender: CommandSender): Long =
         raw.toLongOrNull() ?: illegalArgument("无法解析 $raw 为长整数")
 }
 
-object ShortArgParser : CommandArgParser<Short>() {
+object ShortArgParser : CommandArgParser<Short> {
     override fun parse(raw: String, sender: CommandSender): Short =
         raw.toShortOrNull() ?: illegalArgument("无法解析 $raw 为短整数")
 }
 
-object ByteArgParser : CommandArgParser<Byte>() {
+object ByteArgParser : CommandArgParser<Byte> {
     override fun parse(raw: String, sender: CommandSender): Byte =
         raw.toByteOrNull() ?: illegalArgument("无法解析 $raw 为字节")
 }
 
-object DoubleArgParser : CommandArgParser<Double>() {
+object DoubleArgParser : CommandArgParser<Double> {
     override fun parse(raw: String, sender: CommandSender): Double =
         raw.toDoubleOrNull() ?: illegalArgument("无法解析 $raw 为小数")
 }
 
-object FloatArgParser : CommandArgParser<Float>() {
+object FloatArgParser : CommandArgParser<Float> {
     override fun parse(raw: String, sender: CommandSender): Float =
         raw.toFloatOrNull() ?: illegalArgument("无法解析 $raw 为小数")
 }
 
-object StringArgParser : CommandArgParser<String>() {
+object StringArgParser : CommandArgParser<String> {
     override fun parse(raw: String, sender: CommandSender): String {
         println("STRING PARSER! $raw")
         return raw
     }
 }
 
-object BooleanArgParser : CommandArgParser<Boolean>() {
+object BooleanArgParser : CommandArgParser<Boolean> {
     override fun parse(raw: String, sender: CommandSender): Boolean = raw.trim().let { str ->
         str.equals("true", ignoreCase = true)
                 || str.equals("yes", ignoreCase = true)
@@ -74,7 +74,7 @@ object BooleanArgParser : CommandArgParser<Boolean>() {
  * output: Bot
  * errors: String->Int convert, Bot Not Exist
  */
-object ExistBotArgParser : CommandArgParser<Bot>() {
+object ExistBotArgParser : CommandArgParser<Bot> {
     override fun parse(raw: String, sender: CommandSender): Bot {
         val uin = try {
             raw.toLong()
@@ -89,7 +89,7 @@ object ExistBotArgParser : CommandArgParser<Bot>() {
     }
 }
 
-object ExistFriendArgParser : CommandArgParser<Friend>() {
+object ExistFriendArgParser : CommandArgParser<Friend> {
     //Bot.friend
     //friend
     //~ = self
@@ -142,7 +142,7 @@ object ExistFriendArgParser : CommandArgParser<Friend>() {
     }
 }
 
-object ExistGroupArgParser : CommandArgParser<Group>() {
+object ExistGroupArgParser : CommandArgParser<Group> {
     override fun parse(raw: String, sender: CommandSender): Group {
         //by default
         if ((raw == "" || raw == "~") && sender is MemberCommandSender) {
@@ -177,7 +177,7 @@ object ExistGroupArgParser : CommandArgParser<Group>() {
     }
 }
 
-object ExistMemberArgParser : CommandArgParser<Member>() {
+object ExistMemberArgParser : CommandArgParser<Member> {
     //后台: Bot.Group.Member[QQ/名片]
     //私聊: Group.Member[QQ/名片]
     //群内: Q号
diff --git a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/command/internal/CompositeCommandImpl.kt b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/command/internal/CompositeCommandImpl.kt
index cc4a145b8..8e52c9e2e 100644
--- a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/command/internal/CompositeCommandImpl.kt
+++ b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/command/internal/CompositeCommandImpl.kt
@@ -114,15 +114,16 @@ internal abstract class CompositeCommandImpl : Command {
         return block
     }
 
-    @JvmField
-    internal val bakedCommandNameToSubDescriptorArray: Map<Array<String>, SubCommandDescriptor> = kotlin.run {
-        val map = LinkedHashMap<Array<String>, SubCommandDescriptor>(subCommands.size * 2)
-        for (descriptor in subCommands) {
-            for (name in descriptor.bakedSubNames) {
-                map[name] = descriptor
+    internal val bakedCommandNameToSubDescriptorArray: Map<Array<String>, SubCommandDescriptor> by lazy {
+        kotlin.run {
+            val map = LinkedHashMap<Array<String>, SubCommandDescriptor>(subCommands.size * 2)
+            for (descriptor in subCommands) {
+                for (name in descriptor.bakedSubNames) {
+                    map[name] = descriptor
+                }
             }
+            map.toSortedMap(Comparator { o1, o2 -> o1!!.contentHashCode() - o2!!.contentHashCode() })
         }
-        map.toSortedMap(Comparator { o1, o2 -> o1!!.contentHashCode() - o2!!.contentHashCode() })
     }
 
     internal class DefaultSubCommandDescriptor(