Attribute Modify

# AttributeModify / NeoAttributeModify **Version 1.2.3 | Minecraft 1.20.1 Forge and Minecraft 1.21.1 NeoForge** Modify item attributes and related item behavior through datapacks. AttributeModify supports vanilla and modded attributes, mining overrides, durability changes, decorative item profiles, weighted quality data, and optional Curios or Accessories slots. AttributeModify and NeoAttributeModify are distributed through the same CurseForge and Modrinth project pages. Install only the file that matches your Minecraft version and mod loader. ## Available Versions | Mod | Minecraft | Loader | Java | | ------------------ | --------- | ------------- | ------- | | AttributeModify | 1.20.1 | Forge 47 | Java 17 | | NeoAttributeModify | 1.21.1 | NeoForge 21.1 | Java 21 | Forge and NeoForge files are not interchangeable. ## Features * Add, replace, set, or remove item attribute modifiers * Remove a specific modifier operation without removing the others * Override mining speed while preserving external speed multipliers * Raise an item's harvest capability to vanilla or modded mining tier requirements * Override durability and define custom durability triggers * Disable functional behavior for decorative items without deleting unrelated player effects * Roll weighted quality data during crafting, loot generation, or villager trades * Generate datapack rules through an in-game editor * Apply rules conditionally using NBT paths * Support vanilla and modded items * Apply changes in multiplayer environments * Reload datapack rules using `/reload` * Keep Curios and Accessories rule storage isolated ## Requirements ### AttributeModify — Minecraft 1.20.1 * Minecraft `1.20.1` * Forge `47.4.0` or a compatible Forge 47 release * Java `17` Optional integrations: * Curios `5.14.1+` * Accessories `1.0.0-beta.47+` * Apotheosis `7.4.8` and its required Placebo dependency ### NeoAttributeModify — Minecraft 1.21.1 * Minecraft `1.21.1` * NeoForge `21.1.220` or newer * Java `21` Optional integrations: * Curios `9.5.1+` * Accessories `1.0.0-beta.47+` Both versions start normally when the optional integration mods are absent. ## Datapack Layout Place the datapack inside: ```text <world>/datapacks/ ``` Attribute rule files belong under: ```text data/<namespace>/item_attributes/ ``` Example structure: ```text MyAttributePack/ |-- pack.mcmeta `-- data/ `-- my_namespace/ `-- item_attributes/ `-- tools.json ``` Run `/reload` after changing datapack files. ## Datapack Formats The required `pack_format` depends on the Minecraft version. ### Minecraft 1.20.1 Use datapack format `15`: ```json { "pack": { "pack_format": 15, "description": "My AttributeModify rules" } } ``` ### Minecraft 1.21.1 Use datapack format `48`: ```json { "pack": { "pack_format": 48, "description": "My NeoAttributeModify rules" } } ``` ## In-Game Editor Each version provides its own client command. | Mod | Editor command | Generated datapack | | ------------------ | ---------------------------- | --------------------------- | | AttributeModify | `/attributemodify_editor` | `AttributeModify_Editor` | | NeoAttributeModify | `/neoattributemodify_editor` | `NeoAttributeModify_Editor` | The generated datapack is written into the current world's datapack directory. Saving requires either: * Being the owner of the singleplayer world * Having permission level `2` or higher on a server ## Support Discord: https://discord.gg/NXVEtWqsnw