Compostable Recipes

The mod adds a recipe type that lists items the composter accepts, so an item can be made compostable by adding a recipe file to a data pack. Item tags are supported, and many of the common item tags Minecraft already defines, such as crops, are available as ingredients. Some seeds, crops and breads that do nothing in the composter in vanilla start working once the mod is installed.

Recipes follow a fairly standard format. From Minecraft 1.21.5 the ingredient format changed to use an item or tag key instead of a plain ingredient string, and the mod follows the new layout for that release. An optional weight key sets how much a recipe counts toward the composter's level chance, and conflicts between recipes are resolved by weight. Vanilla compostable items default to a weight of 10, and a recipe can set a higher value to override them.

Compostable Recipes is released under the MIT License, is open source, and runs on the server side only, so players join without installing it. Its files cover Minecraft 1.21.1 and 1.21.5, with 1.0.0-1.21.5 for 1.21.5 as the latest Fabric file.