Adding more modded weapon attributes via KubeJS? | latcord | Page 1

limber gulch Dec 7, 2025, 8:04 PM

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In short, since Better Combat adds new attack animations and hitboxes for specific weapon types, I've been trying to add parity with vanilla tools, as well as adding additional stats to tools with Pufferfish's Attributes, but I'm struggling because I'm not experienced with javascript let alone anything advanced with KubeJS.

Edit: found a solution regarding Better Combat's attack animations without KubeJS.

Any and all help would be greatly appreciated!

I've been using code from KonSola5 to modify tool stats like Attack Speed and Attack Damage, but I want to assign special stats from Pufferfish's AttributesI've tried:

I also don't know how to structure my code to call Pufferfish's Attributes and add them onto pre-existing tools, as it seems modifyAttributes and $Attributes function does not allow for non-vanilla attributes to be called, despite it being able to be filled in in VSC.

I'm still learning, and I want to learn more from the people here who are much more knowledgeable than me.

subtle cipherBOT Dec 7, 2025, 8:04 PM

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Once your ticket has been resolved, please close it with </ticket close:1054771505520717835> command!

limber gulch Dec 7, 2025, 8:05 PM

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A portion of what I'm working with:

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``const $Attributes = Java.loadClass("net.minecraft.world.entity.ai.attributes.Attributes");
const $WeaponType = Java.loadClass("handler$boo000$bettercombat$getAttributeValue_Inject(attribute: Internal.Attribute_, cir: Internal.CallbackInfoReturnable_<any>): void;"); //My attempt

ItemEvents.modification((event) => {
/**

@param {Internal.Item} item
@param {Internal.Attribute_} attribute
@param {number} value
*/

/**

@param {Internal.item} item
@param {Internal.WeaponAttributes_} type //My attempt
*/

function modifyAttribute(item, attribute, value) {
const attributeToModify = item.getAttributes(attribute).get(0);
item.removeAttribute(attribute, attributeToModify.id);
item.addAttribute(
attribute,
attributeToModify.id,
attributeToModify.name,
value,
attributeToModify.operation
);
}
function modifyType(item, type) {
const typeToModify = item.getType(type).get(0);
item.removeType(type, typeToModify.id);
item.addType(
type,
typeToModify.id,
typeToModify.name,
typeToModify.operation
);
}

//Flint Tools
event.modify("kubejs:flint_hatchet", (item) => {
item.maxDamage = 45;
item.digSpeed = 3;
modifyAttribute(item, $Attributes.ATTACK_DAMAGE, 4.5);
});
event.modify("kubejs:flint_pickaxe", (item) => {
item.maxDamage = 45;
item.digSpeed = 3;
modifyAttribute(item, $Attributes.ATTACK_DAMAGE, 4);
});``

limber gulch Dec 8, 2025, 8:22 PM

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Changing weapon attributes via KubeJS?

wide jungle Dec 8, 2025, 8:28 PM

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To format your code, put it between three backticks, with "js" after the first set:
```js
console.log("Hello, world!")
```

becomes:

console.log("Hello, world!")

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const $WeaponType = Java.loadClass(
  'handler$boo000$bettercombat$getAttributeValue_Inject(attribute: Internal.Attribute_, cir: Internal.CallbackInfoReturnable_<any>): void;'
)

This is invalid, it looks like you pasted the dumped TS definition that ProbeJS generated into Java.loadClass(). No, that's not correct.
Java.loadClass can load Java classes. To load a class, you must provide a fully qualified class name.

Tip: Use IntelliSense (Ctrl + Space) inside the brackets to see completions.

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/**
   * @param {Internal.Item} item
   * @param {Internal.Attribute_} attribute
   * @param {number} value
   */

This bit from my code is just type definitions for TypeScript to offer better completions - so the parameters aren't any. This does NOT change runtime behavior - it's only for editor convenience.

#

 function modifyType(item, type) {
    const typeToModify = item.getType(type).get(0);
    item.removeType(type, typeToModify.id);
    item.addType(
      type,
      typeToModify.id,
      typeToModify.name,
      typeToModify.operation
    );
  }

What is this for? And what mod would even add getType to Item?

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Also:
$Attributes is NOT a function, it's a class, which houses all vanilla attributes.
You definitely CAN use modded attributes, but you have to use that mod's class which exposes its attributes.

wide jungle Dec 8, 2025, 8:59 PM

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As for example, I gave an Iron Pickaxe +3 Fortune from Pufferfish's Attributes:

const $AttributesMod = Java.loadClass('net.puffish.attributesmod.AttributesMod')

ItemEvents.modification(event => {
  const UUIDS = {
    FORTUNE: UUID.fromString("1e7e044b-e0d7-4caa-af46-ee9fabf3ec20")
  }

  /**
   * @param {Internal.Item} item
   * @param {Internal.UUID} uuid
   * @param {Internal.Attribute_} attribute
   * @param {number} value
   * @param {Internal.AttributeModifier$Operation_} operation
   */
  function addAttribute(item, uuid, attribute, value, operation) {
    item.addAttribute(
      attribute,
      uuid,
      "Attribute modification",
      value,
      operation
    )
  }

  event.modify('minecraft:iron_pickaxe', item => {
    addAttribute(item, UUIDS.FORTUNE, $AttributesMod.FORTUNE, 3, "addition")
  })
})

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limber gulch Dec 8, 2025, 10:58 PM

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Omgggg thank you so much again 😭 Imma work on all this when I get back on my laptop.

limber gulch Dec 9, 2025, 12:16 AM

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wide jungle As for example, I gave an Iron Pickaxe +3 Fortune from Pufferfish's Attributes: ...

One thing that's been tripping me up is 'uuid'. I don't know what the term for what I'm trying to describe is, but is this different for different entries or whatever this stuff is? And if so, how do I go about locating whichever specific uuids I would need to, say, call for a different attribute like knockback or life steal?

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Also, can I list multiple attributes under where it says js FORTUNE: UUID.fromString("1e7e044b-e0d7-4caa-af46-ee9fabf3ec20")?

wide jungle Dec 9, 2025, 9:19 AM

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limber gulch One thing that's been tripping me up is 'uuid'. I don't know what the term for ...

UUID is a unique identifier.

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Also, yeah - for each unique attribute, add a new UUID to the UUIDS object.

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Generate UUIDs here: https://www.uuidgenerator.net/

limber gulch Dec 9, 2025, 11:51 AM

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wide jungle Also, yeah - for each unique attribute, add a new UUID to the `UUIDS` object.

So UUIDs aren't found in the game/mod's files? You just gotta make one?

wide jungle Dec 9, 2025, 3:30 PM

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For new attributes - yes

limber gulch Dec 9, 2025, 4:51 PM

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wide jungle As for example, I gave an Iron Pickaxe +3 Fortune from Pufferfish's Attributes: ...

So, just copied this code and modified it to try and apply other attributes and it doesn't work ;-; Not even fortune like in your example.

#


ItemEvents.modification(event => {
  const UUIDS = {
    FORTUNE: UUID.fromString("1e7e044b-e0d7-4caa-af46-ee9fabf3ec20"),
    KNOCKBACK: UUID.fromString("cada926d-aa75-4a22-9b2b-c7953b0f770d"),
    ARMOR_SHRED: UUID.fromString("36cc0596-b4fd-4d1c-8711-d1c3a811628e")


  }

  /**
   * @param {Internal.Item} item
   * @param {Internal.UUID} uuid
   * @param {Internal.Attribute_} attribute
   * @param {number} value
   * @param {Internal.AttributeModifier$Operation_} operation
   */
  function addAttribute(item, uuid, attribute, value, operation) {
    item.addAttribute(
      attribute,
      uuid,
      "Attribute modification",
      value,
      operation
    )
  }

//Tools

//Flint Tools
event.modify('kubejs:flint_pickaxe', item => {
  addAttribute(item, UUIDS.ARMOR_SHRED, $AttributesMod.ARMOR_SHRED, 1, "addition")
})
//Golden Tools
  event.modify('minecraft:golden_pickaxe', item => {
    addAttribute(item, UUIDS.FORTUNE, $AttributesMod.FORTUNE, 2, "addition")
  })
  event.modify('minecraft:golden_shovel', item => {
    addAttribute(item, UUIDS.FORTUNE, $AttributesMod.FORTUNE, 2, "addition"),
    addAttribute(item, UUIDS.KNOCKBACK, $AttributesMod.KNOCKBACK, 1, "addition")
  })
})```

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I also removed Quark before testing just to be safe, as it adds a passive Fortune/Looting II to all golden tools.

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Is there something else I'm doing wrong?

wide jungle Dec 9, 2025, 4:58 PM

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Did at least the Flint Pickaxe got its attributes?

limber gulch Dec 9, 2025, 7:05 PM

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Nope

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I even tried your example of an Iron Pick with Fortune +3 and it doesn't work

wide jungle Dec 9, 2025, 7:06 PM

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Weird

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For me, it works fine

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Try making a minimal instance with just KubeJS and Pufferfish's Attributes (and their dependencies) and try again, if that works it means that one of the mods is doing something unexpected

limber gulch Dec 9, 2025, 7:08 PM

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Perhaps it's because I put the 'addAttribute' script you gave me in a separate json file?

limber gulch Dec 9, 2025, 7:08 PM

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wide jungle Try making a minimal instance with just KubeJS and Pufferfish's Attributes (and ...

Yea lemme try that

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okay yeah, it seems another mod is conflicting with the pufferfish's attributes script

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Regardless, I thank you for your help and information. Gonna pop a message here after closing the ticket once I find out what mod conflicts with this.

subtle cipherBOT Dec 9, 2025, 7:16 PM

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subtle cipher Once your ticket has been resolved, please close it with </ticket close:10547715...

Ticket closed!

limber gulch Dec 10, 2025, 3:30 PM

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limber gulch Regardless, I thank you for your help and information. Gonna pop a message here ...

Turns out, no mods were making it conflict. Making another Javascript file for adding pufferfish's attributes to items is what was causing the issue. I just put the script into the original Item modification javascript file and it works wonderfully!

wide jungle Dec 10, 2025, 3:43 PM

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making another json file for adding pufferfish's attributes
What?
I don't know what do you mean, because I'm not that well versed in datapacks.
Or does another mod add such capability?

limber gulch Dec 10, 2025, 5:59 PM

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No no, so basically in my KubeJS startup script folder, I have an 'Item Modification' file, 'Item Attribute' file and an 'Item Registry' file.

'Item Registry' is for adding new items into my modpack.
'Item Modification' is used for changing the properties of items like stack size or attack damage.
'Item Attribute' was what I was using to try and add Pufferfish's Attributes to items.

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Both 'Item Modification' and 'Item Attribute' were both using ItemEvents.modification, but I put the code for adding Pufferfish's skills into 'Item Modification' instead of having it exist in its own javascript file and it worked.

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No mods were causing the issues I was having, apparently.

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(And i also deleted 'Item Attributes' from my startup script folder)

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Also, I just realized that I mis-typed. I meant to say "Javascript file", not "Json".

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Buuuut I mean it works now 😄

limber gulch Jan 18, 2026, 8:45 PM

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Just wanna re-open this to extend on what my original ticket was asking for help about:

My main asking point is: how would I go about adding weapon attributes from mods other than Pufferfish's skills? I've tried loading several different java classes, but none seem to fit for the mods I want to use.

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Adding more modded weapon attributes via KubeJS?

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Namely, I just want to know how the process works, like how it was solved for Pufferfish's skills. I want to add weapon attributes from mods like Apothic Attributes [attributelib], Tinker's, Oreganized, etc

novel moth Jan 18, 2026, 8:47 PM

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Since better combat is very popular you might find a kube js script balancing the range and attack speed in a modpack

limber gulch Jan 18, 2026, 9:11 PM

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Oh no, I don't mean weapon attributes for Better Combat, I mean like adding stats like Kinetic Damage [Oreganized], or Dodge Chance [Apothic Attributes]

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One thing I will note is that I've found that for Oreganized specifically, I can allow an item to gain the mod's Kinetic Damage trait by adding a tag to it, but I want to change the value of it on a per-item basis.

limber gulch Jan 21, 2026, 2:12 PM

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Bumping this

limber gulch Jan 27, 2026, 4:42 PM

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Okay nevermind, because of a modpack that uses KubeJS, I found a piece of code that allows me to do what I was looking to do: item.addAttribute( "minecraft:generic.movement_speed", "27c72d42-c11e-404b-8577-0adf8e6c1863", "-5% Movement Speed", -0.05, "multiply_total" );

#Adding more modded weapon attributes via KubeJS?