This Fabric/Forge mod allows for creation of stonecutter recipes through tags. Any item in these tags can be crafted into any other item in the same tag. This allows for large decreases in JSON files and recipe counts, cutting file counts and reducing lag.

To get started, add this mod to your development environment.

repositories {
    maven { url = "https://mvn.devos.one/snapshots/" } // SCRT
    maven { url = "https://jitpack.io/" } // Mixin Extras, used by SCRT
}

dependencies {
    // loader - may be 'fabric', 'forge', or 'common'
    // version - find it on the maven: https://mvn.devos.one/#/snapshots/io/github/tropheusj/stonecutter_recipe_tags
    include(modImplementation("io.github.tropheusj.stonecutter_recipe_tags:<loader>:<version>"))

    // for an Architectury project, you can use this in the root subprojects block to set up all 3
    String platform = project.name
    String scrt = "io.github.tropheusj.stonecutter_recipe_tags:$platform:<version>"
    if (platform != "common") {
        scrt += ".$platform"
        include(scrt)
    }
    modImplementation(scrt)
}

Replace <version> with the latest version number found on the mod page.

StonecutterRecipeTagManager is where all the magic happens. However, most of the time you won't even need to touch it. To create a recipe tag, start by creating a subfolder in your mod's item tags directory. This subfolder should be named stonecutter_recipes. File structure should look something like this:
resources/data/modid/tags/items/stonecutter_recipes/
Any tag inside this folder will automatically be registered as a recipe tag.

In order to craft, all items must be equated to full blocks. Each item has a linked amount that determines how many of it is needed to equal a full block. For most items, this will be 1. For slabs, it will be 2. For snow layers, it's 8. You can register your own with StonecutterRecipeTagManager#setAmountForFullBlock. If you need to cover a large amount of items, such as with an instanceof, you can instead register a provider with StonecutterRecipeTagManager#registerFullBlockAmountProvider.

Example use case: quarter slabs would have a full block amount of 4.

StonecutterRecipeTagManager has a few other methods which may be utilized. See the Javadocs for more information.