diff --git a/tools/intellij-plugin/src/diagnostics/CommandDeclarationChecker.kt b/tools/intellij-plugin/src/diagnostics/CommandDeclarationChecker.kt
index be26d1a98..6965c23f4 100644
--- a/tools/intellij-plugin/src/diagnostics/CommandDeclarationChecker.kt
+++ b/tools/intellij-plugin/src/diagnostics/CommandDeclarationChecker.kt
@@ -12,6 +12,8 @@ package net.mamoe.mirai.console.intellij.diagnostics
 import net.mamoe.mirai.console.compiler.common.diagnostics.MiraiConsoleErrors.ILLEGAL_COMMAND_DECLARATION_RECEIVER
 import net.mamoe.mirai.console.compiler.common.resolve.COMMAND_SENDER_FQ_NAME
 import net.mamoe.mirai.console.intellij.resolve.hasSuperType
+import net.mamoe.mirai.console.intellij.resolve.isCompositeCommandSubCommand
+import net.mamoe.mirai.console.intellij.resolve.isSimpleCommandHandler
 import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
 import org.jetbrains.kotlin.diagnostics.Diagnostic
 import org.jetbrains.kotlin.psi.KtDeclaration
@@ -23,16 +25,15 @@ class CommandDeclarationChecker : DeclarationChecker {
     override fun check(declaration: KtDeclaration, descriptor: DeclarationDescriptor, context: DeclarationCheckerContext) {
         if (declaration !is KtNamedFunction) return
 
-        // exclusive checks
-        // currently no checks
-//        when {
-//            declaration.isSimpleCommandHandler() -> {
-//            }
-//
-//            declaration.isCompositeCommandSubCommand() -> {
-//            }
-//            else -> return
-//        }
+        // exclusive checks or return
+        when {
+            declaration.isSimpleCommandHandler() -> {
+            }
+
+            declaration.isCompositeCommandSubCommand() -> {
+            }
+            else -> return
+        }
 
         // common checks
         checkCommandReceiverParameter(declaration)?.let { context.report(it) }