diff --git a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/utils/JavaFriendlyAPI.kt b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/utils/JavaFriendlyAPI.kt
new file mode 100644
index 000000000..23db91223
--- /dev/null
+++ b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/utils/JavaFriendlyAPI.kt
@@ -0,0 +1,8 @@
+package net.mamoe.mirai.console.utils
+
+/**
+ * 表明这个 API 是为了让 Java 使用者调用更方便. Kotlin 使用者不应该使用这些 API.
+ */
+@RequiresOptIn(level = RequiresOptIn.Level.ERROR)
+@Target(AnnotationTarget.PROPERTY, AnnotationTarget.FUNCTION, AnnotationTarget.TYPE, AnnotationTarget.CLASS)
+internal annotation class JavaFriendlyAPI