Contents of spoilers.7z

advancements/chest_recipe.json:

{
	"rewards": {
		"recipes": ["minecraft:chest"]
	},
	"criteria": {
		"slightly_full_inventory": {
			"trigger": "minecraft:inventory_changed",
			"conditions": {
				"slots": {
					"occupied": 9
				}
			}
		},
		"already_has_recipe": {
			"trigger": "minecraft:recipe_unlocked",
			"conditions": {
				"recipe": "minecraft:chest"
			}
		}
	},
	"requirements": [["slightly_full_inventory"], ["already_has_recipe"]]
}

advancements/upgrade_tools.json:

{
	"display": {
		"icon": "minecraft:stone_pickaxe",
		"title": "Upgrade tools"
	},
	"parent": "minecraft:story/mine_stone",
	"criteria": {
		"stone_pickaxe": {
			"trigger": "minecraft:inventory_changed",
			"conditions": {
				"items": [
					{
						"item": "minecraft:stone_pickaxe"
					}
				]
			}
		}
	}
}


recipes/book.json:

{
  "type": "crafting_shapeless",
  "ingredients": [
    {
      "item": "minecraft:paper"
    },
    {
      "item": "minecraft:paper"
    },
    {
      "item": "minecraft:paper"
    },
    {
      "item": "minecraft:leather"
    }
  ],
  "result": {
    "item": "minecraft:book"
  }
}

recipes/golden_axe.json:

{
  "type": "crafting_shaped",
  "pattern": [
    "XX",
    "X#",
    " #"
  ],
  "key": {
    "#": {
      "item": "minecraft:stick"
    },
    "X": {
      "item": "minecraft:gold_ingot"
    }
  },
  "result": {
    "item": "minecraft:golden_axe"
  }
}