Durability Decay

Every repair reduces an item’s usable durability. A thin red segment appears on the right side of the durability bar to show the lost portion. Mending does not cause decay by default.

How It Works

• Physical repairs cause small, permanent durability loss.
• Red segment grows from the right as items decay more.
• When the red segment reaches the limit, the item can’t be fully restored by physical means.
• Mending is exempt by default. You can enable it per config.

Configuration

• base Fixed decay added on every repair.
• fraction Portion of the repaired amount that becomes decay.
• max Maximum decay per operation
• min Minimum decay per operation
• mending_impacts_block
false = Mending does not add decay.
  true = Mending also adds decay.

Defaults

• base: 0
• fraction: 0.25
• max: 0.5
• min: 0
• mending_impacts_block: false

Notes

• Per-item config supported
• Works with item tags for batch tuning.

FAQ

Why is Mending exempt?
Physical repairs aren't going to be perfect, so they reduce integrity.

Can I disable decay for certain items?
Yes. Set their max to 0 or omit them from your rules and rely on defaults.

Example Config

{
  "default": {
    "base": 0,
    "fraction": 0.25,
    "max": 0.5,
    "min": 0,
    "mending_impacts_block": false
  },
  "items": {
    "minecraft:diamond_sword": {
      "base": 0.02,
      "fraction": 0.3,
      "max": 3,
      "min": 0,
      "mending_impacts_block": false
    }
  }
}