Seeds Filtering — Mod overview

A mod for PackDev that allows you to select only certain default seeds.

How it works

When you click Create New World and leave the seed field empty:

If the config seed list is empty, Minecraft behaves normally and picks a fully random seed.
If the config seed list has one or more entries, the mod picks one at random and uses it for the new world.

If you type a seed manually, the mod does nothing and your chosen seed is used as usual.

Each world creation is independent. With three seeds in the list, each one has an equal chance every time you create a world.

Entries in the config are plain strings. Minecraft converts them when the world is created:

Numeric strings (e.g. 12345, -9876543210) → used as the numeric world seed
Text strings (e.g. minecraft) → converted via hashCode() to a numeric seed
Empty string in the list → treated like a normal empty seed (random)

On first launch, the mod creates config/seeds_filtering-common.toml:

# List of seeds to randomly pick from on new world creation (empty = fully random).

seeds = []

Example with three seeds:

seeds = [
    "123456789",
    "minecraft",
    "42"
]