For Mod Developers

Custom triggers in Java, when JSON is not enough.

LegacyAPI

Register a predicate and use it from any data pack with "trigger": { "type": "custom", "id": "mymod:fate" }.

LegacyAPI.registerCustomTrigger("mymod:fate",
        (serverPlayer, title) -> serverPlayer.getInventory().contains(new ItemStack(Items.NETHER_STAR)));

LegacyAPI.grant(player, id) and LegacyAPI.revoke(player, id) give and take titles directly.

More in Adding Your Own

Data Pack Basics

No code needed. Drop a JSON file into a data pack and Legacy picks it up.

Adding a Title

One JSON file and one language entry.

Adding a Journey

A first time worth remembering, with its own text right in the file.

Adding a Milestone

A world-first for your server.