diff --git a/bukkit/src/main/java/net/momirealms/craftengine/bukkit/api/event/AsyncResourcePackCacheEvent.java b/bukkit/src/main/java/net/momirealms/craftengine/bukkit/api/event/AsyncResourcePackCacheEvent.java
index 56776f611..35f1cdd4f 100644
--- a/bukkit/src/main/java/net/momirealms/craftengine/bukkit/api/event/AsyncResourcePackCacheEvent.java
+++ b/bukkit/src/main/java/net/momirealms/craftengine/bukkit/api/event/AsyncResourcePackCacheEvent.java
@@ -5,6 +5,22 @@ import org.bukkit.event.Event;
 import org.bukkit.event.HandlerList;
 import org.jetbrains.annotations.NotNull;
 
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+/**
+ * This event is triggered when a user executes the "/ce reload pack" command.
+ * <p>
+ * The event initiates a process that caches all resource content into a virtual file system
+ * to ensure optimal build performance. To add your resource pack through this event,
+ * you must use the {@link #registerExternalResourcePack(Path)} method every time this event is called.
+ * </p>
+ * <p>
+ * Important: The caching system will not update your resource pack if its file size or
+ * last modification time remains unchanged between reloads. Ensure these attributes change
+ * if you need the cache to recognize updates.
+ * </p>
+ */
 public class AsyncResourcePackCacheEvent extends Event {
     private static final HandlerList HANDLER_LIST = new HandlerList();
     private final PackCacheData cacheData;
@@ -16,7 +32,7 @@ public class AsyncResourcePackCacheEvent extends Event {
 
     @NotNull
     public PackCacheData cacheData() {
-        return cacheData;
+        return this.cacheData;
     }
 
     @NotNull
@@ -28,4 +44,24 @@ public class AsyncResourcePackCacheEvent extends Event {
     public HandlerList getHandlers() {
         return getHandlerList();
     }
+
+    /**
+     * Adds an external resource pack to the cache.
+     * <p>
+     * This method accepts either a .zip file or a directory path representing a resource pack.
+     * The resource pack will be added to the appropriate cache collection based on its type.
+     * </p>
+     *
+     * @param path the file system path to the resource pack. Must be either a .zip file or a directory.
+     * @throws IllegalArgumentException if the provided path is neither a .zip file nor a directory.
+     */
+    public void registerExternalResourcePack(@NotNull final Path path) {
+        if (Files.isRegularFile(path) && path.getFileName().endsWith(".zip")) {
+            this.cacheData.externalZips().add(path);
+        } else if (Files.isDirectory(path)) {
+            this.cacheData.externalFolders().add(path);
+        } else {
+            throw new IllegalArgumentException("Illegal resource pack path: " + path);
+        }
+    }
 }
diff --git a/core/src/main/java/net/momirealms/craftengine/core/pack/AbstractPackManager.java b/core/src/main/java/net/momirealms/craftengine/core/pack/AbstractPackManager.java
index 18da08797..f053a6102 100644
--- a/core/src/main/java/net/momirealms/craftengine/core/pack/AbstractPackManager.java
+++ b/core/src/main/java/net/momirealms/craftengine/core/pack/AbstractPackManager.java
@@ -273,7 +273,7 @@ public abstract class AbstractPackManager implements PackManager {
     @Override
     public void initCachedAssets() {
         try {
-            PackCacheData cacheData = new PackCacheData(plugin);
+            PackCacheData cacheData = new PackCacheData(this.plugin);
             this.cacheEventDispatcher.accept(cacheData);
             this.updateCachedAssets(cacheData, null);
         } catch (Exception e) {
diff --git a/core/src/main/java/net/momirealms/craftengine/core/pack/PackCacheData.java b/core/src/main/java/net/momirealms/craftengine/core/pack/PackCacheData.java
index 702bf2163..1b4d1f23e 100644
--- a/core/src/main/java/net/momirealms/craftengine/core/pack/PackCacheData.java
+++ b/core/src/main/java/net/momirealms/craftengine/core/pack/PackCacheData.java
@@ -1,6 +1,5 @@
 package net.momirealms.craftengine.core.pack;
 
-import it.unimi.dsi.fastutil.objects.ObjectOpenHashSet;
 import net.momirealms.craftengine.core.plugin.CraftEngine;
 import net.momirealms.craftengine.core.plugin.config.Config;
 import org.jetbrains.annotations.NotNull;
@@ -8,6 +7,7 @@ import org.jetbrains.annotations.NotNull;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.Set;
+import java.util.stream.Collectors;
 
 public class PackCacheData {
     private final Set<Path> externalZips;
@@ -17,13 +17,13 @@ public class PackCacheData {
         this.externalFolders = Config.foldersToMerge().stream()
                 .map(it -> plugin.dataFolderPath().getParent().resolve(it))
                 .filter(Files::exists)
-                .collect(ObjectOpenHashSet.toSet());
+                .collect(Collectors.toSet());
         this.externalZips = Config.zipsToMerge().stream()
                 .map(it -> plugin.dataFolderPath().getParent().resolve(it))
                 .filter(Files::exists)
                 .filter(Files::isRegularFile)
                 .filter(file -> file.getFileName().toString().endsWith(".zip"))
-                .collect(ObjectOpenHashSet.toSet());
+                .collect(Collectors.toSet());
     }
 
     @NotNull