https://github.com/SpongePowered/SpongeAPI/pull/1582 covered building basic recipes with the builder and registering custom implemented Recipes.
The following points are some things that were not covered by the PR.
[ ] Diable mirroring in ShapedRecipes.
[ ] Create Ingredients that are not used up in the recipe.
[ ] Create a ResultCalculator than can compute the recipe result based on input.
[ ] Support for other modded Recipes.
[ ] RecipeBooks to hide/disable recipes for players.
[ ] CraftingContext / SmeltingContext passing in more info like crafter/furnace
[ ] SmeltingRecipe Fuel. (see feature/fuel branch)
https://github.com/SpongePowered/SpongeAPI/pull/1582 covered building basic recipes with the builder and registering custom implemented Recipes. The following points are some things that were not covered by the PR.