src/main/java/com/tiedup/remake/events/system/AnvilEventHandler.java

@@ -40,7 +40,11 @@ public class AnvilEventHandler {
 
         // Check if item can have a padlock attached (tape, slime, vine, web cannot)
         if (!lockable.canAttachPadlock()) {
-            return; // Item type cannot have padlock
+            return; // Item type cannot have padlock (V1)
+        }
+        // V2 data-driven items: check definition's can_attach_padlock field
+        if (!com.tiedup.remake.v2.bondage.datadriven.DataDrivenBondageItem.canAttachPadlockTo(left)) {
+            return;
         }
 
         // Item must not already have a padlock attached

src/main/java/com/tiedup/remake/v2/bondage/datadriven/DataDrivenBondageItem.java

@@ -436,6 +436,19 @@ public class DataDrivenBondageItem extends AbstractV2BondageItem {
         );
     }
 
+    /**
+     * Stack-aware padlock attachment check for data-driven items.
+     * Returns false for organic items (slime, vine, web, tape) that have
+     * {@code can_attach_padlock: false} in their JSON definition.
+     */
+    public static boolean canAttachPadlockTo(ItemStack stack) {
+        DataDrivenItemDefinition def = DataDrivenItemRegistry.get(stack);
+        if (def != null) {
+            return def.canAttachPadlock();
+        }
+        return true;
+    }
+
     // ===== FACTORY =====
 
     /**

src/main/java/com/tiedup/remake/v2/bondage/datadriven/DataDrivenItemDefinition.java

@@ -58,6 +58,9 @@ public record DataDrivenItemDefinition(
     /** Whether this item can be locked with a padlock. */
     boolean lockable,
 
+    /** Whether a padlock can be attached to this item. False for organic items (slime, vine, web, tape). */
+    boolean canAttachPadlock,
+
     /** Whether this item supports color variants. */
     boolean supportsColor,
 

src/main/java/com/tiedup/remake/v2/bondage/datadriven/DataDrivenItemParser.java

@@ -200,6 +200,9 @@ public final class DataDrivenItemParser {
         // Optional: lockable (default true)
         boolean lockable = getBooleanOrDefault(root, "lockable", true);
 
+        // Optional: can_attach_padlock (default true). False for organic items.
+        boolean canAttachPadlock = getBooleanOrDefault(root, "can_attach_padlock", true);
+
         // Optional: supports_color (default false)
         boolean supportsColor = getBooleanOrDefault(
             root,
@@ -335,6 +338,7 @@ public final class DataDrivenItemParser {
             posePriority,
             escapeDifficulty,
             lockable,
+            canAttachPadlock,
             supportsColor,
             tintChannels,
             icon,