Mantle

Blocks

• Signs now register their own block entity instead of injecting into the vanilla block entity

New Utilities

• Added generic data provider: a basic data provider for JSON generators
• Added NamedComponentRegistry: Simple registry for a resource locaton to object registry for components of JSON files
• Added GenericSerializerRegistry: allows registering a loader for something that reads/writes to JSON.
• Added GenericLoaderRegistry: allows registering a loader for something that reads/writes to JSON and the packet buffer
• Added ISafeManagerReloadListener: for registering a reload listener that safely exits if forge enters an invalid state
• Added IEarlySafeManagerReloadListener: for registering a reload listener that runs during the first stage of reload that safely exits if forge enters an invalid state
• Added MergingJsonDataLoader: Loads data from JSON, merging JSONs from all packs
• Added ResourceValidator: Loads a list of present resource locations from a pack and allows checking if it exists
• Added FluidNameIngredient: Allows referencing a fluid from another mod during datagen
• Added FluidTagEmptyCondition: Like TagEmptyCondition but for fluids
• Added LoggingRecipeSerializer: Recipe serializer that logs on decoder errors
• Added cast ticker and server ticker helper to BlockEntityHelper

Utility Tweaks

• Allow extensions of InventoryBlockEntity to opt out of saving size in NBT
• Added utilities to register metal blocks with ingots and nuggets
• Added way to register enum block with no items
• Registering wood blocks now simpler, requires fewer parameters
• Fix wood block objects not having all blocks in getValues

Renames

• Container is now ContainerMenu
• Inventory is now Container in most classes
• Recipe builders
  • addCriterion is now unlockedBy
  • setGroup is now group
  • build is now save
• Tile entity is now block entity
• Rename IngredientWithout to IngredientDifference
• Many repackages, ask on the SlimeKnights discord if unsure where something went

Removals

• Remove defaultIfNull as Java added Objects.requireNonNullOrElse
• Remove cached config values as Forge now caches them
• Remove offhand indicator tag in favor of the boolean enable

Models

• Make model caches concurrent

Books

• API changes
  • Page IDs are now resource locations instead of strings
  • Recipe age size is now autodetected by default
  • Pages now have a getTitle method to make indexes simplier
  • Section transformer no longer translates both <pageName>, just <sectionName>.<pageName>
  • Fix structure page text being inconsistent with other page content types
• Added command to open a book by ID
• Added test book to help debug content types in dev
• Fix book caching names for language entries when reloading contents