Duplicates Config

After the unification, many recipes become identical. Two mods might both add a recipe to smelt Raw Silver into a Silver Ingot. Once both recipes output the same target item and accept the same tag, one of them is redundant. The duplicates config defines how such duplicates are detected and which recipe is kept.

Location: config/almostunified/duplicates.json

Options

Key	Description	Default
ignored_recipe_types	List of recipe types to exclude from the duplicate check. Supports regular expressions.	["cucumber:shaped_tag"]
ignored_recipe_ids	List of recipe IDs to exclude from the duplicate check. Supports regular expressions.	[]
default_duplicate_rules	The rules used to compare recipes of all recipe types.	see below
override_duplicate_rules	Rules for specific recipe types that replace the default rules.	see below
compare_all	Whether all recipes are compared with each other instead of only unified recipes.	false

How Duplicates Are Detected

Recipes are only compared with recipes of the same recipe type. Two recipes are duplicates if their JSON is equal, except for the fields listed in ignored_fields. If two recipes differ in a field that has a rule, they are still duplicates, and the rule decides which of them is kept.

All duplicates are grouped together. Only one recipe of each group, the master recipe, is kept, and all other recipes are removed. The master recipe keeps its original ID.

For crafting recipes, the recipes must have the same output item. Shaped crafting recipes are compared by their actual layout instead of the raw pattern and key fields, so two recipes with different key symbols but the same layout are detected as duplicates.

Duplicate Rules

Both default_duplicate_rules and each entry of override_duplicate_rules have the following structure:

{
    "ignored_fields": ["group", "category"],
    "rules": {
        "cookingtime": "HigherRule"
    },
    "handle_implicit_counts": false
}

ignored_fields

Top-level fields of the recipe JSON that are ignored when comparing two recipes. Good examples are group and category, which only affect the recipe book, or recipe conditions, which don't change the recipe itself.

rules

Top-level fields that are allowed to differ between duplicates. The value defines which recipe is kept:

• HigherRule: keeps the recipe with the higher value
• LowerRule: keeps the recipe with the lower value

The default rules prefer the recipe with the higher cookingtime, energy, and experience. Fields with a rule are automatically ignored for the regular comparison.

handle_implicit_counts

Some recipes write an item with a count of 1 explicitly, e.g. { "id": "minecraft:iron_ingot", "count": 1 }, while others leave the count out because it defaults to 1. When enabled, Almost Unified treats both variants as equal, which detects more duplicates but makes the comparison slower.

override_duplicate_rules

An object that maps recipe types to their own rules. If a recipe type has an override, the default rules are not used for it at all. The override has to contain all ignored fields and rules that should apply.

By default, there is an override for minecraft:crafting_shaped, which additionally ignores the pattern and key fields, because shaped recipes are compared by their layout.

compare_all

By default, only recipes that were changed by the unification are compared with the other recipes of the same type. Recipes that existed before and were not touched are not compared with each other.

When compare_all is enabled, all recipes are compared with each other, including recipes that were not unified. This finds duplicates that already existed before the unification, but makes the loading considerably slower in large modpacks.

Default Config

NeoForge:

{
    "ignored_recipe_types": ["cucumber:shaped_tag"],
    "ignored_recipe_ids": [],
    "default_duplicate_rules": {
        "ignored_fields": ["neoforge:conditions", "group", "category", "show_notification"],
        "rules": {
            "cookingtime": "HigherRule",
            "energy": "HigherRule",
            "experience": "HigherRule"
        },
        "handle_implicit_counts": false
    },
    "override_duplicate_rules": {
        "minecraft:crafting_shaped": {
            "ignored_fields": [
                "neoforge:conditions",
                "group",
                "category",
                "show_notification",
                "pattern",
                "key"
            ],
            "rules": {},
            "handle_implicit_counts": false
        }
    },
    "compare_all": false
}

On Fabric, neoforge:conditions is replaced with fabric:load_conditions.