Creo API

Utilities to modify advancements and improve advancement capabilities.

Features:

• Add new criterion to an advancement

• Override an advancement's requirements

• Override an advancement's rewards

• Override an advancement's display title, description, icon, background, frame, etc

• Override an advancement's parent

Wiki | Source 

Extensions giving blocks more functionality.

Features:

• Extension interfaces for more block functionality

Wiki | Source

Injection utilities related to blocks.

Features:

• Inject blocks into Block Entities and Points of Interest.

• Inject new block state properties into blocks.

Wiki | Source 

Utilities to modify vanilla content such as blocks, items, and entities.

Features:

• Override a block's hardness, luminance, sound group, slipperiness, etc

• Override an item's rarity, food component, max count, etc

• Override an entity type's spawn group, spawn egg colors, loot table, etc

• Override an enchantment's rarity, slot types, target, etc

• Override a status effect's category, color, attribute modifiers, etc

Wiki | Source 

Many new tags bringing easy functionality to blocks, items, entity types, biomes, and more.

Features:

• Block tags such as RAVAGER_BREAKABLE, BEACON_BEAM_IGNORES, CONDUIT_FRAME_BASE_BLOCKS, etc

• Item tags such as CACTUS_IMMUNE, REPAIRS_IRON_GOLEM, HOPPER_IGNORES, etc

• Entity type tags such as LIGHTNING_IMMUNE, TRIPWIRE_IGNORES, SCARES_CREEPERS, etc

• Enchantment tags such as CURSES, NOT_OFFERED_BY_LIBRARIANS, GRINDSTONE_IGNORES, etc

• Status effect tags such as MILK_DOES_NOT_CURE

Wiki | Source 

Abstraction layer for Minecraft's datafixer system to make it accessible to mod developers.

Features:

• Easily change identifiers in any registry

Many new entity attributes for more control over entities.

Features:

• Gravity

  • Controls how strong of a downward force is applied when off the ground

• Swim Speed

  • Controls entity speed while swimming

• Climbing Speed

  • Controls entity speed while climbing

• Crouching Speed

  • Controls entity speed while crouching

• Scale

  • Controls how large the entity and its hitbox are

• Jump Strength

  • Controls an entity's base jump height

• Reach Distance

  • Controls how far an entity can reach

• Attack Range

  • Controls how far an entity can attack from

• Max Air

  • Controls how much air an entity can hold when suffocating

• Block Place Speed

  • Controls the block placing delay

• Block Break Speed

  • Controls the block breaking delay

Wiki | Source 

Modify collision interactions between entities and blocks.

Features:

• Specify certain blocks for an entity to ignore colliding with.

Wiki | Source 

Event callbacks to hook into vanilla code.

Features:

• Entity spawn events

• Block/entity interaction events

• Item usage events

• World events

• Crafting events

• Technical events

Wiki | Source 

Customizable locational, conditional, or per-biome fog.

Features:

• Display fog per-biome, under certain conditions, or at certain positions

• Modify fog density, shape, color, and interpolation

Extensions to the vanilla food component system.

Features:

• Food eating speeds

• Food item durability

• Food health restoration

Wiki | Source 

Extensions giving items more functionality.

Features:

• Extension of Item.Settings providing more customizability for items.

• Extension interfaces for more item functionality.

Wiki | Source 

Utilities to improve compatibility between mods.

Features:

• Per-mod constants accessible and modifiable via a mod storage registry.

Wiki | Source 

Interaction with vanilla shaders.

Features:

• Utilities to easily add, remove, or clear shaders

• More built-in shaders

Wiki | Source 

Features, surface rules, density functions, noise, and more to improve worldgen capabilities.

Features:

• Placement modifiers to place features or structures based on noise, density functions, steepness, etc

• Many built-in features and placers

• Implementation of FastNoiseLite usable in worldgen

Wiki | Source