# Minecraft Random Sequence

> Minecraft Random Sequences 随机序列：Storage Format 存储格式（data/minecraft/random_sequences.dat GZip NBT、Root tag data：include_sequence_id 序列命名空间ID是否参与种子 /random reset * 可修改、include_world_seed 世界种子是否参与、salt 初始化盐、sequences 命名空间ID→source 长数组 种子低64位+高64位、DataVersion）、Creating Sequences 创建序列（参数：identifier/worldSeed/salt、Xoroshiro128++ 128位种子、初始种子 salt ^ worldSeed ^ 0x6A09E667F3BCC909L、unmixedHi64 unmixedLo64+0x9E3779B97F4A7C15L、include_sequence_id MD5标识符XOR两半、mixStafford13混合、零种子替换）、Behavior 行为（缺失/不完整文件初始化 include_sequence_id=true include_world_seed=true salt=0、每次使用消耗并更新序列、大多数战利品表计算使用随机序列 方块掉落/生物掉落/钓鱼/猪灵以物易物、世界生成战利品箱直接种子控制）、/random reset 重置序列（给定参数）、/random reset * 重置所有并同步参数到文件）。

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

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# Random Sequences

This content applies only to Java Edition.

Random sequences provide controllable randomization via random number generator sequences.

## Storage format

File: `<save root>/data/minecraft/random_sequences.dat` (GZip NBT):

- Root tag
  - `data` (compound, required):
    - `include_sequence_id` (bool): whether the sequence namespace ID participates in seeding; modifiable by `/random reset *`; absent = `true`.
    - `include_world_seed` (bool): whether the world seed participates; absent = `true`.
    - `salt` (int): salt for initialization; absent = 0.
    - `sequences` (compound, required): created sequences.
      - `<namespace ID>` (compound): one sequence with `source` (long array, required): seed low 64 bits + high 64 bits.
  - `DataVersion` (int): absent = 1343 (Java 1.12.2).

## Creating sequences

Parameters: identifier, worldSeed, salt. The game uses Xoroshiro128++ with a 128-bit seed:

```java
long initialSeed = salt;
if (include_world_seed) initialSeed ^= worldSeed;
long unmixedLo64 = initialSeed ^ 0x6A09E667F3BCC909L;
long unmixedHi64 = unmixedLo64 + 0x9E3779B97F4A7C15L;
```

If `include_sequence_id`, the MD5 of the identifier is XORed into both halves. Then both halves are mixed with `mixStafford13` (`(l ^ l>>>30) * 0xBF58476D1CE4E5B9L`, then `(l ^ l>>>27) * 0x94D049BB133111EBL`, then `l ^ l>>>31`). A zero seed is replaced with low −7046029254386353131L / high 7640891576956012809L.

## Behavior

Missing/incomplete files initialize with `include_sequence_id=true`, `include_world_seed=true`, `salt=0`. Each use consumes and updates the sequence. Most loot table calculations use random sequences (block drops, mob drops, fishing, piglin bartering); world-gen loot chests are directly seed-controlled instead.

`/random reset` resets a sequence with the given parameters; `/random reset *` resets all and syncs parameters into the file.