# Minecraft Cow Variant

> Minecraft Cow Variant 牛变体定义：COW_VARIANT 注册表、data/<namespace>/cow_variant/ 数据包路径、JSON 格式（asset_id 成年牛纹理、baby_asset_id 幼牛纹理、model 模型类型 normal/cold/warm、spawn_conditions 生成条件）、asset_id/baby_asset_id 纹理解析（assets/<namespace>/textures/<path>.png）、Model 模型类型（normal 温带牛、cold 寒冷牛、warm 热带牛）、Spawn Conditions 生成条件选择器（condition.type 生物群系/月光亮度/结构、biome biomes 标签/ID/列表、moon_brightness range 范围（满月1/新月0）、structure structures 标签/ID/列表、priority 优先级 随机打破平局）、服务器启动加载（/reload 不重新加载）、COW_VARIANT 注册表至少一个元素、最高优先级有效选择器生成牛变体。

- Skill: `zmjjkk123-hub/minecraft-cow-variant` (Agent Skill)
- Install (CLI): `npx skillmds@latest add zmjjkk123-hub/minecraft-cow-variant`
- Raw SKILL.md: https://api.skillmd.com/api/skills/zmjjkk123-hub/minecraft-cow-variant/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: ZMJJKK123-hub (https://skillmd.com/u/zmjjkk123-hub)
- Updated: 2026-09-22
- Page: https://skillmd.com/skills/zmjjkk123-hub/minecraft-cow-variant

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# Cow Variants

This content applies only to Java Edition.

Cow variant definition files define cow variants and their spawn rules.

## Definition format

Cow variants use the `COW_VARIANT` registry; the datapack path is `cow_variant` (definitions in `data/<namespace>/cow_variant`).

Definition files use JSON with the following structure:

- JSON file root object
  - `asset_id` (string, required): (namespace ID) cow texture; resolved to `assets/<namespace>/textures/<path>.png`.
  - `baby_asset_id` (string, required): (namespace ID) baby cow texture.
  - `model` (string, default `normal`): `normal`, `cold`, or `warm` (temperate/cold/tropical cows).
  - `spawn_conditions` (list, required): variant spawn selectors.
    - One selector (compound):
      - `condition` (compound): `type` (string, required): `biome` (`biomes` string/list: tag `#`, ID, or list), `moon_brightness` (`range` min-max bounds; full moon 1, new moon 0), or `structure` (`structures` string/list: tag `#`, ID, or list).
      - `priority` (int, required): selection priority; ties resolved randomly.

## Definition behavior

Cow variant data is loaded only once at server startup; `/reload` does not reload it — a server restart is required. The `COW_VARIANT` registry must have at least one element, or the game errors during sync and blocks world loading.

When spawning a cow, the game evaluates all variant selectors and spawns the variant of a highest-priority valid selector (random among ties).