Changelog

26.3.0.0

Updated to Minecraft 26.3.
Added the Poplar tree type, with poplar leaf ambience.
The Tree Simulator now works with the Fortune enchantment: each level adds a roll to every drop.
Added the useAxeDurability config option to stop the Tree Simulator from damaging axes.

Resources Types are no longer a datapack registry. They are now loaded from /config/resourcestrees/resources_type/ using simple JSON files. Add the name field to each JSON (the filename without .json also works as a fallback).
Tree Types are now configurable. Drop JSON files into /config/resourcestrees/tree_type/ to register new tree shapes.
Every resource+tree combination is its own block/item. Saplings, leaves, and leaf fragments are individually registered instead of relying on data components or block entities to store the resource type.
Automatic migration. Legacy saplings, leaves, and leaf fragments from older versions are automatically migrated to the new block/item on load.
Auto-generated client assets. Block states and item models are generated at runtime — you only need to define block models and item models for brand-new tree types.
Auto-generated loot tables. If no custom loot table is defined, one is generated automatically for saplings and leaves.
Auto-generated recipes. Sapling crafting recipes and Tree Simulator recipes are generated automatically unless you override them (place overrides under /saplings/<sapling_name>.json and /tree_simulator/<sapling_name>.json).
Plugin API added (experimental). Developers can register resource types and tree types in code via IResourcesTreesPlugin. Use config files for stability.
KubeJS integration removed.

Legacy saplings, leaves, and leaf fragments are deprecated and will be completely removed in version 26.2. Any blocks/items that have not been migrated by then will disappear.

Version numbering: patch updates increment by 1, minor updates by 10, major updates by 100.