Copper Age Backport Patch

An unofficial patch and compatibility addon for Copper Age Backport on Minecraft 1.21.1 (NeoForge and Fabric).

Important Loader Note

• Fabric: Copper Age Backport runs completely fine on Fabric on its own and does not crash. On Fabric, this mod serves as a gameplay, balance, and mod compatibility addon.
• NeoForge: On NeoForge 21.1.237 and newer, Copper Age Backport suffers from a startup registry collision crash. This patch resolves that crash on NeoForge.

Features

• Armor Trims (Vanilla Smithing Table)

  • Copper armor pieces (Helmet, Chestplate, Leggings, Boots) can be trimmed with vanilla armor trim templates without needing any other mod.
  • Includes a custom high-contrast copper_darker palette for copper trims on copper armor.

• Tool Trims Mod Compatibility (Optional Integration)

  • Adds full compatibility with the Tool Trims mod.
  • Note: Tool trimming is NOT a standalone feature; it requires the Tool Trims mod to be installed. When installed, all 5 copper tools (Sword, Axe, Pickaxe, Shovel, Hoe) can be trimmed across 4 patterns and 10 materials.

• Armor Durability Restoration & Anvil Repair

  • Restores balanced durability values (Helmet: 121, Chestplate: 176, Leggings: 165, Boots: 143) based on tier multiplier 11. Upstream omitted durability, making armor unbreakable.
  • Copper armor and copper tools can now be repaired on an Anvil using Copper Ingots.

• Creative Inventory Organization

  • Combat Tab: Copper Axe appears in the Creative Combat tab directly after Stone Axe, matching vanilla weapon tier progression.
  • Spawn Eggs Tab: Positions the Copper Golem Spawn Egg directly after the Cod Spawn Egg and before the Cow Spawn Egg, matching official 1.21.9 release order.

• Modern Copper Golem Spawn Egg & Visual Fixes

  • Automatically uses the modern detailed spawn egg texture when Vanilla Backport is installed, or keeps the classic dotted egg when absent.
  • Choose between AUTO, MODERN, or CLASSIC in config/copper_age_patch.json.
  • Fixed tint filter distortions on Fabric so the spawn egg renders with accurate colors on all loaders.

• In-Game Information (JEI / EMI / REI)

  • Built-in guide pages explaining Copper Golem oxidation stages, waxing, antenna items, lightning rod de-oxidation, copper shelf storage, and anvil repairs.

• Jade HUD Tooltips

  • Displays held items, antenna flowers (e.g. poppy gifted by an Iron Golem), oxidation stages, and waxed status on Copper Golems, plus inventory previews for copper shelves via Jade.

• Create Mod Interoperability

  • Unifies copper nuggets under standard common tags (#c:nuggets/copper, #c:copper_nuggets) with bidirectional crafting and Crushing Wheel recycling with Create.

• Better Combat Integration

  • Native attack animations, weapon attributes, and sweep hitboxes with Better Combat.

• NeoForge Registry Crash Fix

  • Fixes the duplicate ResourceKey / armor material registration crash on NeoForge 21.1.237+.

• 20+ Supported Languages

  • Built-in translations for over 20 languages including English, Turkish, German, French, Spanish, Russian, Chinese, Japanese, and Korean.

Requirements & Compatibility

Credits and License

• Original Copper Age Backport by Smallinger (CC0).
• Patch developed by 1unarea under the MIT License.