diff --git a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/internal/plugin/JarPluginLoaderImpl.kt b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/internal/plugin/JarPluginLoaderImpl.kt
index 1902510e6..45b4ea85a 100644
--- a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/internal/plugin/JarPluginLoaderImpl.kt
+++ b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/internal/plugin/JarPluginLoaderImpl.kt
@@ -17,6 +17,7 @@ import net.mamoe.mirai.console.plugin.PluginLoadException
 import net.mamoe.mirai.console.plugin.jvm.JarPluginLoader
 import net.mamoe.mirai.console.plugin.jvm.JvmPlugin
 import net.mamoe.mirai.console.plugin.jvm.JvmPluginDescription
+import net.mamoe.mirai.console.plugin.jvm.JvmPluginDescriptionImpl
 import net.mamoe.mirai.console.setting.SettingStorage
 import net.mamoe.mirai.console.util.ConsoleExperimentalAPI
 import net.mamoe.mirai.utils.MiraiLogger
@@ -56,14 +57,14 @@ internal object JarPluginLoaderImpl :
     override val JvmPlugin.description: JvmPluginDescription
         get() = this.description
 
-    override fun Sequence<File>.mapToDescription(): List<JvmPluginDescription> {
+    override fun Sequence<File>.mapToDescription(): List<JvmPluginDescriptionImpl> {
         return this.associateWith { URI("jar:file:${it.absolutePath.replace('\\', '/')}!/plugin.yml").toURL() }
             .mapNotNull { (file, url) ->
                 kotlin.runCatching {
                     url.readText()
                 }.fold(
                     onSuccess = { yaml ->
-                        Yaml.nonStrict.decodeFromString(JvmPluginDescription.serializer(), yaml)
+                        Yaml.nonStrict.decodeFromString(JvmPluginDescriptionImpl.serializer(), yaml)
                     },
                     onFailure = {
                         logger.error("Cannot load plugin file ${file.name}", it)
@@ -73,10 +74,12 @@ internal object JarPluginLoaderImpl :
             }
     }
 
-    @Suppress("RemoveExplicitTypeArguments") // until Kotlin 1.4 NI
     @Throws(PluginLoadException::class)
-    override fun load(description: JvmPluginDescription): JvmPlugin =
-        description.runCatching<JvmPluginDescription, JvmPlugin> {
+    override fun load(description: JvmPluginDescription): JvmPlugin {
+        require(description is JvmPluginDescriptionImpl) {
+            "Illegal description: ${description::class.qualifiedName}"
+        }
+        return description.runCatching {
             ensureActive()
             val main = classLoader.loadPluginMainClassByJarFile(
                 pluginName = name,
@@ -98,9 +101,10 @@ internal object JarPluginLoaderImpl :
                 main.internalOnLoad()
             } else main.onLoad()
             main
-        }.getOrElse<JvmPlugin, JvmPlugin> {
+        }.getOrElse {
             throw PluginLoadException("Exception while loading ${description.name}", it)
         }
+    }
 
     override fun enable(plugin: JvmPlugin) {
         ensureActive()
diff --git a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/plugin/description.kt b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/plugin/description.kt
index ae7cfe85a..f7ef9c8c0 100644
--- a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/plugin/description.kt
+++ b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/plugin/description.kt
@@ -56,7 +56,7 @@ public enum class PluginKind {
 }
 
 /** 插件的一个依赖的信息 */
-@Serializable
+@Serializable(with = PluginDependency.SmartSerializer::class)
 public data class PluginDependency(
     /** 依赖插件名 */
     public val name: String,
diff --git a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/plugin/jvm/JvmPluginDescription.kt b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/plugin/jvm/JvmPluginDescriptionImpl.kt
similarity index 75%
rename from backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/plugin/jvm/JvmPluginDescription.kt
rename to backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/plugin/jvm/JvmPluginDescriptionImpl.kt
index 9d1d193d8..100e48294 100644
--- a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/plugin/jvm/JvmPluginDescription.kt
+++ b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/plugin/jvm/JvmPluginDescriptionImpl.kt
@@ -14,14 +14,28 @@ import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
 import kotlinx.serialization.Transient
 import net.mamoe.mirai.console.internal.setting.SemverAsStringSerializerLoose
-import net.mamoe.mirai.console.plugin.FilePluginDescription
 import net.mamoe.mirai.console.plugin.PluginDependency
 import net.mamoe.mirai.console.plugin.PluginDescription
 import net.mamoe.mirai.console.plugin.PluginKind
+import net.mamoe.mirai.utils.MiraiExperimentalAPI
 import java.io.File
 
+@MiraiExperimentalAPI
 @Serializable
-public class JvmPluginDescription internal constructor(
+public data class JvmMemoryPluginDescription(
+    public override val kind: PluginKind,
+    public override val name: String,
+    public override val author: String,
+    public override val version: @Serializable(with = SemverAsStringSerializerLoose::class) Semver,
+    public override val info: String,
+    public override val dependencies: List<@Serializable(with = PluginDependency.SmartSerializer::class) PluginDependency>
+) : JvmPluginDescription
+
+public interface JvmPluginDescription : PluginDescription
+
+@MiraiExperimentalAPI
+@Serializable
+public class JvmPluginDescriptionImpl internal constructor(
     public override val kind: PluginKind = PluginKind.NORMAL,
     public override val name: String,
     @SerialName("main")
@@ -31,7 +45,7 @@ public class JvmPluginDescription internal constructor(
     public override val info: String = "",
     @SerialName("depends")
     public override val dependencies: List<@Serializable(with = PluginDependency.SmartSerializer::class) PluginDependency> = listOf()
-) : PluginDescription, FilePluginDescription {
+) : JvmPluginDescription {
 
     /**
      * 在手动实现时使用这个构造器.
@@ -45,7 +59,7 @@ public class JvmPluginDescription internal constructor(
         this._file = file
     }
 
-    public override val file: File
+    public val file: File
         get() = _file ?: error("Internal error: JvmPluginDescription(name=$name)._file == null")