Add new AI API

src/main/java/net/citizensnpcs/api/npc/AbstractNPC.java

@@ -380,6 +380,11 @@ public void setProtected(boolean isProtected) {
         data().setPersistent(NPC.DEFAULT_PROTECTED_METADATA, isProtected);
     }
 
+    @Override
+    public void setUseMinecraftAI(boolean use) {
+        data().setPersistent(NPC.USE_MINECRAFT_AI_METADATA, use);
+    }
+
     private void teleport(final Entity entity, Location location, int delay) {
         final Entity passenger = entity.getPassenger();
         entity.eject();
@@ -433,4 +438,9 @@ public void update() {
             goalController.run();
         }
     }
+
+    @Override
+    public boolean useMinecraftAI() {
+        return data().get(NPC.USE_MINECRAFT_AI_METADATA, false);
+    }
 }

src/main/java/net/citizensnpcs/api/npc/NPC.java

@@ -265,6 +265,12 @@ public interface NPC extends Agent, Cloneable {
      */
     public void setProtected(boolean isProtected);
 
+    /**
+     * Set the NPC to use Minecraft AI where possible. Note that the NPC may not always behave exactly like a Minecraft
+     * mob would because of additional Citizens APIs.
+     */
+    public void setUseMinecraftAI(boolean use);
+
     /**
      * Attempts to spawn this NPC.
      *
@@ -295,6 +301,11 @@ public interface NPC extends Agent, Cloneable {
      */
     public void teleport(Location location, TeleportCause cause);
 
+    /**
+     * Whether the NPC is currently set to use Minecraft AI. Defaults to false.
+     */
+    public boolean useMinecraftAI();
+
     /**
      * The Minecraft ambient sound played. String - Minecraft sound name
      */
@@ -413,4 +424,8 @@ public interface NPC extends Agent, Cloneable {
      * Whether to prevent NPC being targeted by hostile mobs. Boolean.
      */
     public static final String TARGETABLE_METADATA = "protected-target";
+    /**
+     * Whether to use Minecraft AI. Boolean.
+     */
+    public static final String USE_MINECRAFT_AI_METADATA = "minecraft-ai";
 }