{
  "type": "crafting_shaped",
  // Crafting pattern. Array must consist of either:
  // - two, two-character elements reflecting an inventory crafting grid.
  // - three, three-character elements reflecting a crafting table grid.
  "pattern": [
    "  D",
    " D ",
    "S  "
  ],
  // Key to the pattern.
  "key": {
    "S": [
      // Multiple item choices can be specified for one ingredient.
      // In case metadata (name/lore/nbt) is attached to an item, all choices are matched as EXACT.
      { "material": "stick" },
      { "material": "blaze_rod" }
    ],
    // 
    "D": { "material": "diamond" }
  },
  // Recipe result.
  "result": {
    "material": "diamond_sword",
    "amount": 1,
    "name": "Diagonally Crafted Diamond Sword",
    "lore": [
      "As the name suggests..."
    ],
    "nbt": "{CustomModelData: 2}"
  },
  // Recipe discover trigger. Optional.
  "discover": {
    // Items to be picked-up before this recipe is "discovered" by the player.
    "items": [
      { "material": "diamond" }
    ]
  }
}

Field discover is optional.

{
  "type": "crafting_shapeless",
  // Crafting ingredients.
  "ingredients": [
    // Multiple item choices can be specified for one ingredient.
    // In case metadata (name/lore/nbt) is attached to an item, all choices are matched as EXACT.
    [
      { "material": "oak_log" },
      { "material": "spruce_log" },
      { "material": "birch_log" },
      { "material": "jungle_log" },
      { "material": "acacia_log" },
      { "material": "dark_oak_log" },
      { "material": "mangrove_log" },
      { "material": "cherry_log" }
    ],
    { "material": "flint_and_steel" }
  ],
  // Recipe result.
  "result": { "material": "charcoal" },
  // Recipe discover trigger. Optional.
  "discover": {
    // Items to be picked-up before this recipe is "discovered" by the player.
    "items": [
      { "material": "oak_log" },
      { "material": "spruce_log" },
      { "material": "birch_log" },
      { "material": "jungle_log" },
      { "material": "acacia_log" },
      { "material": "dark_oak_log" },
      { "material": "mangrove_log" },
      { "material": "cherry_log" }
    ]
  }
}

Field discover is optional.

{
  // Recipe type. For furnace recipes you can use one of: [SMELTING, BLASTING, SMOKING, CAMPFIRE_COOKING]
  "type": "smelting",
  // Furnace input.
  "input": [
    // Multiple item choices can be specified for one ingredient.
    // In case metadata (name/lore/nbt) is attached to an item, all choices are matched as EXACT.
    { "material": "diamond_helmet" },
    { "material": "diamond_chestplate" },
    { "material": "diamond_leggings" },
    { "material": "diamond_boots" }
  ],
  // Recipe result.
  "result": { "material": "diamond" },
  // Experience to award player after taking smelting result. Optional.
  "experience": 0.7,
  // Time it takes to cook this recipe. Measured in ticks. Optional.
  "cooking_time": 200,
  // Recipe discover trigger. Optional.
  "discover": {
    // Items to be picked-up before this recipe is "discovered" by the player.
    "items": [
      { "material": "diamond_helmet" },
      { "material": "diamond_chestplate" },
      { "material": "diamond_leggings" },
      { "material": "diamond_boots" }
    ]
  }
}

All furnace recipe types follow the same schema.

• smelting - recipe for regular furnace.
• blasting - recipe for blast furnace.
• smoking - recipe for smoker.
• campfire_cooking - recipe for campfire.

Fields experience, cooking_time and discover are optional.

{
  "type": "smithing",
  // Base item, you can think of it as an item which upgrades (could) be applied to. More than one item choice can be specified.
  "base": { "material": "iron_pickaxe" },
  // Template item, you can think of it as an upgrade which is applied to the base item. More than one item choice can be specified.
  // This field works only when running 1.20 or higher.
  "template": { "material": "air" },
  // Addition item. For vanilla recipes, it's usually a trim material. More than one item choice can be specified.
  "addition": { "material": "diamond" },
  // Recipe result. Metadata is not supported as it's copied directly from the base item.
  "result": { "material": "diamond_pickaxe" },
  // Recipe discover trigger. Optional.
  "discover": {
    // Items to be picked-up before this recipe is "discovered" by the player.
    "items": [
      { "material": "iron_pickaxe" }
    ]
  }
}

Metadata (name, lore, nbt) is not supported for result items, as it's copied directly from the base item.

Field discover is optional.